CN114345538B - Beneficiation device and beneficiation operation process for effectively improving beneficiation production yield - Google Patents

Abstract

The invention relates to a mineral processing device and a mineral processing operation process for effectively improving the mineral processing production yield, wherein the mineral processing device consists of two parts, namely a mineral pulp separation feeding part and a mineral collecting part; the ore pulp sorting and feeding part comprises an ore pulp material distributing box, a clear water distributing tank and a concentrate settling groove carving area; aiming at the defects that the common shaking table fine particle heavy ore is difficult to return to an enrichment area, and the disc rotary vibration concentrating machine and the belt type shaking table concentrating machine have limited ore pulp settling distance, the improvement and the integration are made; the ore dressing operation process can realize that different thickness ore concentrate settlement notch areas are sequentially arranged in a stepped manner according to the order of processing the thickness of the ore concentrate, the ore pulp falling position coming out from the end part of the ore pulp separation feeding part can be staggered to the maximum extent, the disorder of the falling ore pulp is reduced, and the ore dressing production yield is effectively improved.

Description

A beneficiation device and beneficiation operation process for effectively increasing the output of beneficiation

technical field

The invention relates to the technical field of gravity separation ore dressing, in particular to an ore dressing device and an ore dressing operation process for effectively improving the production output of ore dressing.

technical background

Various metal mines and non-ferrous metal mines are widely distributed in our country. Among them, non-ferrous metals such as rare earths and tungsten account for about half of the world's reserves. However, with the continuous development of the economy and the rapid development of the non-ferrous metal beneficiation industry, a large number of tailing pools are left behind. According to the "China Mine Resource Conservation and Comprehensive Utilization Report (2018)", as of the end of 2017, my country's tailings stockpile was 19.5 billion tons, of which metal tailings accounted for 82%. Such as gold, silver, copper, iron, lead and zinc, etc., there are not only a large amount of heavy metals in these tailings, but also a large amount of heavy metal fine ore between 0.038-0.01 mm in these large number of heavy metal tailings pools. According to statistics, the heavy metal fine ore accounts for 30%-40% of the entire tailings pool. These heavy metal fine ores stay in the tailings pond for a long time, and can easily penetrate into the soil around the tailings pond and pollute the groundwater. Moreover, these heavy metal fine ores are easy to enter the atmosphere with the airflow during the dry season, further polluting the air. At present, major non-ferrous metal beneficiation enterprises still use relatively backward beneficiation processes, flotation and gravity separation, in the process of heavy metal beneficiation. Both of these methods will result in the loss of a large amount of heavy metal fine particles into the tailings pond. According to laboratory analysis, the heavy metal grade of these fine heavy metal particles is very high, basically higher than the grade of the original ore. For example, in a non-ferrous metal mine in a certain place, the grade of tin in the original ore is 0.42%. After the whole beneficiation process, a large amount of fine tailings are lost to the tailings pond. After laboratory analysis, the tin grade in the fine tailings was as high as 0.5-0.6%. Due to the loss of a large amount of fine metals, the recovery rate of tin is extremely low, only 20%. Seriously reduced the economic indicators of non-ferrous metal concentrators and took up a lot of tailings stockpile. Environmental protection has brought enormous pressure. Although the country has issued a large number of preferential policies for the comprehensive treatment of tailings ponds, and a large number of technologies and equipment have also appeared in the existing technology, the technical indicators and economic indicators cannot meet the needs of tailings ponds treatment.

Because of the embarrassment in the beneficiation process of non-ferrous metal concentrators, in recent years, people including China's largest tin company, major scientific research institutes and people from all walks of life have launched systematic research on fine metal ores. The following is a general discussion of these technical studies.

Technology 1. Fine particle shaker. The so-called fine particle shaker is an improvement on the original shaker. The working principle of the shaker: the separation of the shaker is realized under the joint action of the bed strips or grooves on the bed surface and the horizontal water flow. The bed strips or grooves on the bed surface are vertical and nearly perpendicular to the direction of the water flow. A vortex is formed in the groove, and the joint action of the eddy current and the bed strip or the groove can loosen the ore layer and divide it according to the density. This process is called "segregation stratification". Mineral particles with low density in the upper layer are subjected to greater impact by the water flow, while heavy minerals in the lower layer with high density are subject to less impact. Therefore, the lateral movement speed of light mineral particles on the bed surface is greater than that of heavy mineral particles. In the longitudinal direction, the differential movement of the shaker surface (at the beginning, it advances at a slow speed and gradually accelerates, and suddenly retreats when the speed reaches the maximum, and the speed gradually decreases during the retreat, and then repeats the above process). The process of differential motion not only promotes the loose layering of the ore sand layer, but also makes the heavy mineral particles move forward along the longitudinal direction at a higher speed, and makes the light mineral particles move forward at a smaller speed. Since the heavy minerals settle at the bottom of the groove or the bottom of the shaking table, the impact of the lateral water flow is relatively small, and the friction force is very easy to transfer to the heavy minerals settled at the bottom of the groove of the shaking table during the differential movement of the shaking table. Further speed up the forward movement of heavy minerals. While the light minerals will be above the heavy minerals during the differential movement of the shaking table surface, the force transmitted by the shaking table surface is small, and the forward moving speed is lower than the moving speed of the heavy minerals, so that the heavy minerals and light minerals are separated. separation. The main purpose of the grooves on the face of a common shaker is to give heavy minerals a "safe haven". Reduce the lateral movement speed of all minerals and let all minerals pass through the groove one by one, so as to realize the loosening and layering of all minerals inside the groove. Ordinary shakers can quickly settle some coarse and heavy mineral particles on the shaker surface, and under the action of friction and differential motion on the shaker surface, they can be better sorted and recovered. However, for those minerals with finer particle size, under the reciprocating action of lateral water flow, self-flow of ore slurry and differential motion, originally finer mineral particles are more difficult to settle on the shaker surface due to their small self-weight and slow settling speed, thus making The friction force of the shaker surface loses control over this part of the finer mineral particles and flows into the tailings of the shaker together with the water flow to the bottom of the mining area, the bottom of the tailings area, or even run directly to the tail. The improvement direction of the prior art to the fine particle shaker is to increase the number of grooves on the shaker surface. Ordinary shakers have 58 grooves, while fine particle shakers have 158 grooves or even 178 grooves. The purpose of adding grooves is to increase the "safe haven" of minerals, further reduce the speed of lateral movement of mineral particles, and allow more fine mineral particles to settle in the grooves for sorting. Thereby improving the recovery rate of fine-grained heavy minerals. Shortcoming of this improved technology one, heavy mineral all can exist in the bottom from the first engraved groove to the last engraved groove. Basically, the heavy minerals in the 30th to 80th grooves in the front will be brought into the concentrate area under the friction of the shaker surface, while the heavy minerals in the 80th to 120th grooves in the back Minerals will be brought into the middle mining area, and heavy minerals in the final groove will be brought into the tailings area. The heavy minerals at the bottom of the middle mine area and the tailings area will be covered by other light minerals, so this part of the heavy minerals cannot be recovered, resulting in loss. This improved technology shortcoming two, the shaker surface all adopts glass fiber reinforced plastics to make. As a result, the surface of the shaker is not smooth enough, which seriously hinders the smooth progress of heavy minerals on the shaker surface.

Technology 2. Disc vibration beneficiation of ore deposits. The disk vibration beneficiation bed is improved on the basic shortcomings of the ordinary shaker. Its general structure is a cone similar to a yurt. There is a slurry temporary storage box at the highest point in the middle of the cone. A rectangular slurry opening is opened in the box, so that the slurry is scattered towards the disc surface in a fan-shaped surface at a certain angle. When the pulp is fan-shaped and loose, the disc vibrates to guide the mineral particles in the pulp to stratify. The heavy minerals sink into the bottom of the slurry and adhere to the disc surface, and the disc will rotate automatically. Driven by friction, the heavy minerals attached to the disc surface will be taken out of the slurry settlement area and into the enrichment area. Under the force of water, the layer of light minerals on the surface of heavy minerals is washed away. Heavy minerals are left behind and recycled. The advantage of the disc rotary vibrating concentrator is that the heavy minerals settled on the disc surface in the slurry settlement area are moved to the mineral enrichment area in time, instead of being left in the groove like a shaker and being newly added interfered by mineral particles. This technical shortcoming one, the diameter of general disc rotary vibration concentrator is about 4 meters, and the manufacturing cost and transportation cost of this disc are very high. Disadvantages of this technology 2. The material of the disc of the disc rotary vibrating concentrator is glass fiber reinforced plastic, which is similar to the embarrassment of the shaking table, and the performance is not smooth, which leads to the phenomenon that the minerals are not moving smoothly during the beneficiation process, and there is a phenomenon of running ore. Disadvantages of this technology 3. Disc rotary vibrating concentrator is subject to production and transportation costs, plus the consideration of occupying the site area. Therefore, the disc diameter of the disc rotary vibrating concentrator can only be up to 4 meters at present. However, the concentrator adopts the method of intermediate feeding, so the effective settlement distance of the pulp is only 1.6 meters. It will directly lead to the reduction of the ability of the disc rotary vibrating concentrator to process ore pulp. The capacity of a single machine to process dry ore per hour is only 0.34 tons. Much lower than the processing capacity of the shaker. Disadvantage 4. The disc rotary vibrating concentrator adopts the top middle feeding method. The feeding method in the middle will directly reduce the range of the pulp, and if the range of the feeding box is to be increased, the effective settlement distance of the pulp of 1.6 meters will be directly compressed. Therefore, in view of the above problems, the disc rotary vibration concentrator is only used as a concentrator. It cannot be used instead of a shaker for rough selection.

Technology 3. Belt shaker concentrator. This ore concentrator is improved on the basis of ordinary shaking table combined with disc rotary vibrating concentrator and rotary vibrating felt machine. The beneficiation method of the belt shaker concentrator is basically the same as that of the disc rotary vibration concentrator. The difference is that the belt-type concentrator adopts the straight-line operation mode of the belt. The pulp enters the belt concentrator from one end of the belt shaker. Driven by the friction of the belt, it moves to the concentrate ore enrichment area at the other end of the belt, while the light minerals in the middle and top are washed to the tailings area by water. So as to realize the sorting process of minerals. Advantages of the belt shaker concentrator: Advantage 1. Compared with the disc vibrating concentrator, the ore inlet can be placed on the side of the belt shaker concentrator, and the range of the ore inlet can be made larger than that of the disc vibrating concentrator. big. Thereby increasing the processing capacity of its belt shaker concentrator. Advantage 2. Compared with the disc rotary vibrating concentrator, the loose settlement area of the pulp after the belt type concentrator enters the ore is no longer a fan-shaped surface but a rectangular surface or a parallelogram surface. Within the same settlement area distance, The settlement area of the rectangle and parallelogram is much larger than the fan-shaped settlement area of the circular vibrating concentrator. Therefore, it is also possible to increase the throughput. Advantage 3. Compared with the disc rotary vibration concentrator, the beneficiation and enrichment area of the belt shaker can be made longer, and the length of the belt can be increased according to actual needs, thereby increasing the enrichment area of the belt shaker and improving the concentrate grade ;

Disadvantages of belt shaker concentrator: Disadvantage 1. Belt shaker also has the same problems as disc rotary vibrating concentrator. The problem is that the effective settlement distance of the slurry is not enough. According to the investigation, at present, the maximum width of the belt shaker is 2.4 meters, which is only 0.4 meters more than the effective settlement distance of the pulp compared with the disc rotary vibration concentrator, while the effective settlement distance of the pulp of the ordinary shaker is 4.5 meters, which will directly lead to Neither the disc rotary vibrating concentrator nor the belt shaker can reach the processing capacity of the ordinary shaker. Disadvantage 2. The way of unloading the belt shaker is to use the unloading ore equalizing trough for unloading, and the unloading process is relatively uniform. In other words, the released ore pulp is mixed with heavy minerals or light minerals and mixed evenly. When the pulp reaches the surface of the belt shaker concentrator, heavy minerals and light minerals will interfere relatively. In the limited pulp settlement area, it will be difficult for heavy minerals to settle, and serious tailing problems will occur.

The above three technologies are applied in the field of gravity separation ore dressing. Among them, ordinary shaker shakers have been used for the longest and most common time. Although disc rotary vibration concentrators and belt shaker concentrators have been in existence for more than ten years, they have not yet been widely used due to their own shortcomings and many restrictions. Promotion only has a certain application in a small range. At present, there are other equipment or technologies in the field of beneficiation and gravity separation, such as spiral chute concentrators, horizontal centrifuges, rotary vibrating felt machines, trench felt machines, etc. These equipment and technologies are due to certain aspects There are many defects that have led to a low usage rate, so I won’t go into details about the defects.

Looking at all the gravity separation technology or equipment, it is nothing more than using the density difference between minerals within a certain range to separate heavy minerals from light minerals. After a long time of experience in gravity separation, it is found that there are many factors that affect the recovery rate, grade and processing capacity of mineral processing. For example, whether the mineral particles to be selected fully separate heavy minerals from light minerals in the grinding process; whether the minerals are too finely ground in the grinding process; whether the mineral particles are uniform, etc.;

Due to the complexity of the grinding process, the minerals after grinding are bound to have uneven thickness. Then, we focus on the importance of the uniformity and classification of the mineral particle size after grinding. The unevenness of the minerals after grinding will have a certain impact on the gravity separation of the minerals. The particle size of the minerals after grinding generally ranges from tens of meshes to hundreds of meshes. Take an ordinary shaker for illustration. When the ore pulp is transported to the lower ore groove of the shaking table, through the lower ore groove, the ore pulp is evenly lowered to the surface of the shaking table. Due to the existence of grooves on the surface of the shaking table, when the ore pulp enters the first groove, the Under the force of the differential movement of the shaking table, the large-grained minerals will inevitably settle at the bottom of the groove of the shaking table, while the fine-grained minerals will be squeezed out of the groove and enter the next groove, and when the fine-grained minerals reach the first groove In the two grooves, if the large particles in the first groove have not been conveyed by the shaker surface, the first groove can no longer accommodate the new large-grained minerals, and the lateral movement of the slurry will cause The newly entered large-grained minerals enter the second groove, and then the fine-grained heavy minerals that have settled in the second groove are expelled. By analogy, when a steady stream of ore slurry enters the shaker surface, large-grained minerals will come in continuously, and the fine-grained minerals will be pushed farther and farther, and the fine-grained minerals will be pushed into the groove at the end of the shaker surface. . The mineral grains in the engraving groove at the back are finer, and the heavy minerals of these mineral fine grains will also settle at the bottom of the engraving groove, and at the same time, the grade of the finer mineral heavy grains is higher. This part of the fine mineral heavy particles that sink to the bottom will also try to move towards the concentrate enrichment area on the shaker surface with the differential motion of the shaker, but at this time, this part of fine mineral heavy particles has been away from the concentrate on the shaker surface. The ore enrichment area is far away. No matter how hard you try, you can’t reach the concentrate enrichment area. Most of the fine-grained minerals reach the tailings area or the middle mine area. These fine ore heavy particles that reach the middle mine area and tailings area are still settled in the shaker. At the bottom, the top of this part of fine ore and heavy particles will be covered by a thick layer of loose light ore particles, which cannot be observed. Even some fine-grained minerals will be lost directly from the side of the shaker with the water flow. Through the above description, the ordinary shaker can classify the mineral particle size, but there will be serious tailing phenomenon, especially when the mineral particles are uneven in thickness, the fine-grained minerals are very serious. Therefore, disc rotary vibration concentrator and belt shaker concentrator came into being;

The emergence of disc rotary vibrating concentrator and belt shaker concentrator is mainly to make up for the defect that the fine-grained heavy minerals of the ordinary shaker fine-grain shaker cannot reach the concentrate enrichment area. The structural characteristics of the disc rotary vibrating concentrator and the belt shaker concentrator are that when the pulp enters the pulp settlement area, the two devices will move with the pulp as a whole, and then the heavy minerals that have settled at the bottom of the pulp settlement area will be removed. The overall translation moves out of the slurry settlement area and enters the mineral enrichment area. Compared with the ordinary shaker, the part of the ordinary shaker that has settled well, but the fine ore heavy particles that have been far away from the enrichment area, will follow the rotation of the disc of the disc rotary vibrating concentrator or the horizontal movement of the belt of the belt shaker concentrator. Move, and pull the fine ore heavy particles that have been far away from the mineral enrichment area back to the mineral enrichment area. Then take back the fine ore heavy particles that cannot be recovered by this part of ordinary shaking table. To achieve the purpose of increasing the recovery rate;

Although the disc rotary vibrating concentrator and the belt shaker concentrator effectively make up for the defect that ordinary shaker fine particles are difficult to recover, but, as mentioned in the introduction of the two concentrators, the two equipment There is a defect that minerals have a limited settling distance, leading to two problems. Problem 1: If the pulp processing capacity is increased, the flow velocity of the pulp on the settling surface will inevitably increase, but the settling distance of the pulp is too short, resulting in a considerable part of the pulp being difficult to settle and directly lost, resulting in a low recovery rate. Question 2. If it is ensured that the ore pulp has enough time to settle, then it is bound to reduce the amount of ore pulp entering, and reduce the flow velocity on the surface where the ore pulp will settle, so as to ensure sufficient time for the ore pulp to settle. This method will directly lead to a reduction in the processing capacity of the equipment. Doubling down.

Based on the above-mentioned full analysis and elaboration of various mineral processing equipment and technologies, we combined the advantages and disadvantages of various equipment and technologies, through numerous tests and data analysis, and finally invented a method that can effectively increase the processing capacity in the field of gravity separation method.

Contents of the invention

The present invention is mainly aimed at the technical problem of how to increase the processing capacity and recovery rate in the field of gravity separation and mineral dressing, and proposes a mineral processing device that can effectively increase the production output of mineral processing. The improvement and integration of the defects of the limited pulp settlement distance of vibratory concentrators and belt concentrators can improve the recovery rate of fine particles in ordinary concentrators and increase the pulp settlement distance of disc rotary vibratory concentrators and belt concentrators . The present invention also proposes a beneficiation operation process; it can realize step-by-step arrangement of different thick and fine concentrate settlement and grooving areas according to the order of processing concentrate thickness, and can maximize the staggering of the pulp falling position coming out of the end of the pulp sorting feeding part , reduce the confusion of blanking pulp, and effectively increase the output of beneficiation production.

The concrete solution that the present invention solves the problem is:

A beneficiation device that effectively improves the output of beneficiation, which is composed of two parts: a pulp separation and feeding part and an ore collection part; the above pulp separation and feeding part includes a pulp distribution box, a clear water tank and a concentrate settlement groove area ; The groove area of the concentrate settlement groove is in the shape of a flat plate, and the flat plate installation plane of the concentration groove area and the ground have a left-high and right-low angle; the pulp distribution box and the clear water tank are arranged side by side The left side of the plate in the ore settlement groove area is higher than one side, so that the pulp discharge hole at the bottom of the pulp distribution box is aligned with the fine groove surface at the rear of the concentrate settlement groove area, and the clear water outlet hole at the bottom of the water tank is aligned The highest area of the fine groove surface in the front part of the concentrate settlement groove area; at the tail slurry outlet end of the front end of the concentrate settlement groove area, there is also a slurry blanking buffer arc plate connected to it; The connection of the above pulp blanking buffer arc plate is a movable connection, and the angle can be adjusted up and down or left and right according to the different installation positions of the pulp sorting and feeding part;

There are three types of concentrate sinking and grooving areas in the above-mentioned pulp separation and feeding part: coarse concentrate settlement and grooving areas, slightly fine ore settlement and grooving areas and fine concentrate settlement and grooving areas: the three kinds of grooving areas The groove depths are different and the widths are different; the groove depth in the rough concentrate ore settlement groove area is the shallowest, the groove depth in the fine concentrate ore groove area is shallow, and the fine concentrate ore settlement groove depth is the deepest;

The above-mentioned ore collecting part is composed of a belt support roller and a belt; on the working surface of the belt, there are also multiple mineral particle damping belts according to the running direction of the belt;

On one side of the working face of the belt, according to the running direction of the belt, and in the order of the thickness of the concentrate to be processed, there are coarse concentrate settlement groove area, slightly fine concentrate settlement groove area and fine concentrate settlement groove area; specifically : The farther away from the belt, the coarser ore settlement and grooving area is located at a higher relative position of the belt, and the finer ore settlement and grooving area is slightly lower, and the final fine concentrate ore settlement and grooving area is the lowest;

The outlet end of the tail pulp at the end of the three kinds of concentrated ore sinking grooves forms an angle with the belt running direction, so as to ensure that from the three kinds of concentrated ore sinking grooves, through the respectively connected pulp blanking buffer arc plate The coarse-grained pulp, slightly fine-grained pulp and fine-grained pulp land on different horizontal positions of the belt respectively; the specific horizontal position setting of the pulp is: the position of the coarse-grained pulp is relatively high, the position of the slightly fine-grained pulp is in the middle, and the position of the fine-grained pulp is The position of the pulp is the lowest;

On one side of the working surface of the belt, according to the running direction of the belt, a plurality of belt surface flushing outlets are arranged at intervals, and the flushing direction of the nozzles is guaranteed to be at right angles to the belt running direction, or at a certain oblique angle; the belt surface flushing The arrangement of nozzles at intervals means that, starting from the position of the pulp coming out of the end of the feeding part of the previous pulp separation, a belt surface flushing port is arranged before reaching the position of the pulp coming out of the end of the feeding part of the next pulp sorting.

A kind of ore dressing operation process of the present invention is to use the above-mentioned ore dressing device that can effectively increase the output of ore dressing; the process includes feeding into the pulp distribution box, shaking table rough separation and classification, belt collection and transfer to the concentrate enrichment area;

Specific steps are as follows:

① Start the mineral processing device, transport the tailings to be selected to the pulp distribution box in the settlement and groove area of the coarse concentrate, and control the amount of water added to ensure that the mass percentage of the pulp uniformly enters from the pulp discharge hole at the bottom of the pulp distribution box The concentration is adjusted at 20-30%; in the rough concentrate settlement groove area, the particle size of the bottom of the rough concentrate settlement groove area is 120 mesh - 200 mesh coarse particle pulp, under the action of friction, by adjusting the pulp blanking The buffer arc plate controls the settlement distance and lands at the highest horizontal line on the right side of the belt;

② Coarse-grained light minerals and finer-grained heavy minerals are gradually squeezed to the top of the coarse-concentrate sinking groove area under the action of differential motion in the coarse-concentrate sinking groove area, and the clear water discharged from the bottom of the clear water tank Under the action of clear water flushed out of the hole, the slightly finer tailings composed of coarse-grained light minerals and slightly finer-grained heavy minerals at the top of the coarse-concentrate settlement groove area are washed into the slightly finer-grained tailings. In the pulp distribution box in the ore settlement groove area, control the amount of water added to the pulp distribution box to ensure that the mass percentage concentration of the pulp uniformly entered from the pulp discharge hole at the bottom of the pulp distribution box is adjusted at 18-25%; In the finer concentrate settlement groove area, the sedimentation at the bottom of the finer concentrate settlement groove area is 200 mesh-325 mesh finer pulp, and the settlement is controlled by adjusting the slurry blanking buffer arc plate under the action of friction distance, landing at the middle higher horizontal line of the belt;

③The finer-grained light minerals and fine-grained heavy minerals are gradually squeezed to the top of the finer concentrate sinking groove area under the action of differential motion of the finer concentrate sinking groove area, and are evenly arranged by the bottom of the clear water tank Under the action of the clear water flushed out of the clear water outlet hole, the fine-grained tailings composed of finer-grained light minerals and fine-grained heavy minerals at the top of the sinking groove area of the slightly finer concentrate are washed into the fine-grained mine In the pulp distribution box in the concentrate sinking and grooving area, the amount of water added to the pulp distribution box is controlled to ensure that the mass percentage concentration of the pulp uniformly entered from the pulp discharge hole at the bottom of the pulp distribution box is adjusted at 15-20% ; In the fine concentrate settlement groove area, the particle size at the bottom of the fine concentrate settlement groove area is 325 mesh-600 mesh fine particle pulp, and the settlement distance is controlled by adjusting the slurry blanking buffer arc plate under the action of friction, Landing at the lowest horizontal line on the left side of the belt;

④The above-mentioned three kinds of concentrates landed on the belt follow the belt running direction, while transferring and flushing through the flushing port on the belt surface in turn, so that the light particles contained in the top layer of the pulp are washed by the water in the slurry with different thickness particles at different horizontal positions of the belt Go, leaving the coarse particles, slightly finer particles and finer heavy minerals deposited on the belt and transferred to the concentrate enrichment area through the belt; here all the ore pulp has been classified into coarser heavy particles and light particles, slightly Heavy and light particles of fine particles, heavy and light particles of fine particles; important preparations for the next step of selection.

The present invention is mainly aimed at the difficulty of return to the enrichment area for the fine-grained heavy ore on the ordinary shaker, and the improvement and integration of the defects of the limited pulp settlement distance of the disc rotary vibration concentrator and the belt shaker concentrator. The advantages of bed, disc rotary vibration concentrator and belt shaker concentrator are integrated and improved on the basis of discarding their respective shortcomings; the following functions can be realized:

1. Feeding function;

2. Classification of mineral particles in the pulp;

3. Distinguish between heavy minerals and light minerals in the pulp;

4. Increase the settlement distance and area of heavy minerals in the slurry;

5. Ore collection settlement;

6. Enrichment and recovery of heavy minerals.

Structural feature of the present invention can produce following technical effect:

1, the groove depth of the thick ore sinking trough area designed in the pulp separation and feeding part of the present invention is shallower, so that the coarse particles in the pulp stay in the grooves of the coarse concentrate sinking trough area; The particles will cross the grooves in the coarse concentrate settlement groove area and reach the finer concentrate settlement groove area; because the grooves in the finer concentrate settlement groove area are deeper than those in the coarse concentrate settlement groove area , so it is difficult for coarse grained minerals to pass through, while finer mineral grains and fine mineral grains are relatively easy to pass through the grooves in the settlement groove area of finer concentrates, and so on;

2. According to the design of the present invention, from the three kinds of concentrated ore sinking and grooving areas, the coarse-grained ore pulp, the slightly fine-grained ore pulp and the fine-grained ore pulp that come down through the respectively connected pulp blanking buffer arcs are respectively dropped on different horizontal positions of the belt; The effect is: when the belt carries the fine-grained pulp to the landing position of the slightly fine-grained pulp, the heavy fine-grained ore particles that have settled on the belt will not be directly impacted by the fine-grained pulp when it falls, and will not Disturbs heavy particles of fine-grained pulp that have settled on the belt;

3. According to the order of processing concentrate thickness, the present invention arranges the sedimentation and grooving areas of concentrates of different thicknesses step by step, which can maximize the staggered landing position of the pulp coming out of the end of the feeding part of the pulp separation, and reduce the confusion of the blanking pulp;

The pulp blanking buffer arc plate of the present invention can adjust the angle according to the different installation positions of the pulp sorting and feeding part, and minimize the height drop between the belts where the pulp coming out of the end of the pulp sorting and feeding part falls; Chaos of blanking slurry;

4. Before the pulp coming out of the end of the pulp sorting feeding part of the present invention reaches the position of the pulp coming out of the end of the next pulp sorting and feeding part, a flushing device is installed to flush the previous pulp through the impact force of the water flow. The surface layer of light granular minerals after the stratification of the slurry coming out of the end of the sorting feeding part is washed away, leaving the bottom layer of heavy minerals.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a front view of Fig. 1 .

Fig. 4 is a left side view of Fig. 1 .

Fig. 5 is a right side view of Fig. 1 .

The reference signs are explained as follows:

1. Pulp distribution box; 2. Pulp discharge hole; 3. Coarse ore settlement groove area; 4. Fine concentrate ore settlement and groove area; 5. Fine concentrate settlement and groove area; 6. Clear water tank ; 7. Clean water outlet hole; 8. Pulp blanking buffer arc plate; 9. Belt support roller; 10. Belt; 11. Belt surface flushing port; 12. Mineral particle damping belt;

Detailed ways

The present invention will be described in detail below with specific embodiments in conjunction with the accompanying drawings

A mineral processing device that can effectively increase the output of mineral processing. It consists of two parts: the pulp separation feeding part and the ore collection part; the pulp separation and feeding part can realize the particle size classification in the pulp during the feeding process of the pulp , Distinguish the weight of the particles in the pulp, stratify the weight of the particles in the pulp, and will not break up the pulp when it enters the ore collecting device during the feeding process, so as to increase the amount of processed pulp; the collecting part of the device can quickly Transfer the coarse-grained, slightly fine-grained and fine-grained bottom minerals in the slurry to the concentrate enrichment area and throw away the light minerals;

The above-mentioned pulp separation and feeding part (13) includes the pulp distribution box, the clear water tank (6) and the concentrate settlement and groove area; the concentrate settlement groove area is flat, and the plate installation plane of the concentrate settlement groove area There is a left-high and right-low angle with the ground, and the angle is 4° to 10°; the slurry distribution box and the clear water tank (6) are placed side by side on the left side of the plate in the concentrate settlement groove area One side higher than that, so that the pulp discharge hole (2) at the bottom of the pulp distribution box is aligned with the finely carved groove surface at the rear of the concentrate settlement groove area, and the clean water discharge hole (7) at the bottom of the clean water tank (6) is aligned with the The highest area of the fine groove surface in the front part of the quasi-concentrate settlement groove area; at the tail pulp outlet end of the front end of the concentrate settlement groove area, there is also a slurry blanking buffer arc plate (8) with it connected; the connection of the slurry blanking buffer arc plate (8) is a movable connection, and the angle can be adjusted up and down or left and right according to the different installation positions of the slurry sorting and feeding part (13);

The above-mentioned concentration ore settlement and groove area in the feeding part of the slurry separation includes a coarse concentrate settlement and groove area (3), a finer concentrate settlement and groove area (4) and a fine concentrate settlement and groove area (5). Type: the depth and width of the grooves in the three groove areas are different; the groove depth of coarse concentrate settlement is 8-12 mm, and the width is 8-12 mm; the depth of groove settlement of slightly fine concentrate is 12-16 mm, The width is 12-16 mm; the fine concentrate ore settlement groove depth is 18-22 mm, and the width is 18-22 mm; the groove depth of the coarse concentrate ore settlement groove area (3) is the shallowest, and the slightly fine concentrate ore settlement groove area The groove depth of (4) is relatively shallow, and the groove depth of fine concentrate settlement groove area (5) is the deepest;

The above-mentioned ore collection part is composed of a belt support roller (9) and a belt (10); on the working surface of the belt (10), there are also multiple mineral particle damping belts (12) according to the belt running direction;

On one side of the working surface of the belt (10), according to the running direction of the belt, there are coarse concentrate settlement groove area (3), finer concentrate settlement groove area (4) and fine ore settlement groove area (4) and fine ore settlement area arranged step by step according to the order of the thickness of the concentrate. Concentrate settlement groove area (5); specifically: the farther away from the belt (10) the coarse concentrate settlement groove area (3) is located, the higher the relative position of the belt (10) is, and the finer concentrate settlement groove area (4) Slightly lower, and the final fine concentrate settlement groove area (5) is the lowest;

The outlet end of the tail pulp at the end of the three kinds of concentrate sinking and grooving areas has an included angle of 20°-45° with the belt running direction, so as to ensure that the three kinds of concentrate settlement and grooving areas pass through the respective connected The coarse-grained pulp, finer-grained pulp and fine-grained pulp from the pulp blanking buffer arc plate (8) land on different horizontal positions of the belt (10); It is higher on the inside, the position of the slightly finer pulp is in the middle, and the position of the finer pulp is the lowest on the outer side;

On one side of the working surface of the belt (10), according to the running direction of the belt, a plurality of belt flushing outlets (11) are arranged at intervals, and the flushing direction of the outlets is guaranteed to be at right angles to the running direction of the belt, or at a certain oblique angle; The arrangement of the flushing ports (11) on the belt surface at intervals means that counting from the position of the pulp coming out of the end of the previous pulp sorting and feeding part (13), every time it reaches the next pulp sorting and feeding part (13) A belt surface flushing port (11) is arranged before the position of the pulp coming out of the end;

The particle size of the coarse concentrate is 120 mesh-200 mesh; the particle size of the slightly fine concentrate is 200 mesh-325 mesh; the particle size of the fine concentrate is 325 mesh-600 mesh.

Further, the pulp sorting feeding part (13) can be arranged in multiple pieces on the belt (10).

Description of working principle:

Slurry feeding and sorting process: The plane of the pulp sorting feeding part (13) has an included angle inclined to the right with the ground. When the pulp enters the pulp distribution box (1) in the pulp sorting and feeding part (13), then the pulp evenly enters the coarse concentrate from the pulp discharge hole (2) at the bottom of the pulp distribution box (1) In the settlement groove area (3), the pulp sorting and feeding part (13) will make a differential motion along the groove direction, and drive the pulp entering the rough concentrate settlement groove area (3) to do a differential motion, Realize the further loosening of the pulp particles in the rough concentrate settlement groove area (3), so that the particles in the pulp can obtain shear force, and the particles in the pulp are under the action of the shear force, and then realize the size classification of the particles in the pulp, Grading by weight, large grains of heavy minerals will settle at the bottom of the coarse ore concentrate settlement groove area (3), while coarse grains of light minerals and fine grains of heavy minerals will be gradually squeezed out under the shear force obtained by differential motion On the top of the rough concentrate settlement groove area (3), the clear water flushed out by the evenly arranged clear water outlet holes (7) at the bottom of the clear water tank (6) is perpendicular to the direction of the differential movement of the pulp sorting and feeding part Under the active force, the coarse-grained light minerals and fine-grained heavy minerals on the top of the coarse concentrate settlement groove area (3) are washed into the next coarse concentrate settlement groove area (3). And after all the mineral particles go through all the grooves in the coarse concentrate settlement groove area (3), when the particles in all the pulp pass through multiple coarse concentrate sedimentation groove areas (3), most of the Coarse-grained heavy minerals have been left at the bottom of the coarse concentrate settlement groove area (3), and the coarse-grained heavy minerals settled at the bottom of the coarse concentrate settlement groove area (3) will be separated from the slurry feeding part (13) contact with each other and then generate friction force. Since the pulp sorting feeding part (13) has been producing differential motion, it will settle at the bottom of the rough concentrate settlement groove area (3) and move along the settlement groove under the action of friction force. The slurry blanking buffer arc plate (8) at the bottom of the tank moves in the direction and falls gently on the belt (10). When all the mineral particles of the slurry go through all the grooves in the rough concentrate settlement groove area (3) one by one, most of the coarse heavy minerals are left and sent away by the coarse concentrate settlement groove area (3), and The remaining pulp particles are mainly some finer and finer mineral particles, and then these particles enter the slightly finer concentrate settlement groove area (4) under the impact force of the water flow perpendicular to the groove direction. After this part of the finer pulp particles enters the finer concentrate settlement groove area (4), the heavy particles in the finer pulp particles will also settle in the finer concentrate settlement after being stratified by the shear force The bottom of the grooving area (4) will move along the direction of the grooving to the direction of the slurry blanking buffer arc plate (8) along with the friction force of the fine ore settlement of the grooving area (4) and gently fall on the belt ( 10) on. The fine-grained light minerals and fine-grained heavy minerals in the slightly finer pulp will be gradually squeezed to the top of the finer concentrate settlement groove area (4) under the action of shear force, and the fine particles in this part of the slightly finer pulp Light minerals and fine-grained heavy minerals will be flushed out from the clear water outlet holes (7) evenly arranged at the bottom of the clear water tank (6) under the force of the clear water perpendicular to the direction of differential movement of the pulp sorting and feeding part. The slightly finer grained light minerals and fine grained heavy minerals at the top of the finer concentrate settlement groove area (4) are washed into the next finer concentrate settlement groove area (4). When all the finer pulp particles have gone through the finer concentrate settlement groove area (4), most of the finer heavy minerals will settle in the finer concentrate settlement groove area (4) and be taken to the slurry blanking buffer On the arc plate (8) and gently fall on the belt (10). The rest of the fine grain minerals will then come to the fine concentrate settlement groove area (5). And repeat the above actions;

After all the pulp passes through the coarse concentrate settlement groove area (3), slightly fine concentrate settlement groove area (4) and fine concentrate settlement groove area (5), it comes to the slurry blanking buffer arc plate ( 8) on. Here all the ore pulp has been divided into heavy and light particles of coarse particles, heavy and light particles of slightly finer particles, heavy particles and light particles of fine particles. Made important preparations for the next selection;

Slurry selection process: when the heavy particles and light particles of coarse particles, the heavy particles and light particles of slightly finer particles and the heavy particles and light particles of fine particles come to the corresponding coarse concentrate settlement groove area (3 ) on the slurry blanking buffer arc plate (8), on the slurry blanking buffer arc plate (8) of the slightly fine concentrate settlement groove area (4), and on the slurry blanking buffer arc plate (8) of the fine particle concentrate settlement groove area Plate (8), falls on the belt (10) through the pulp blanking buffer arc plate (8) respectively. Since there is a certain angle between the end edge of the pulp separation feeding part (13) and the pulp blanking buffer arc plate (8) and the running direction of the belt, the corresponding pulp from the rough concentrate settlement groove area (3) Coarse ore light particles and heavy particles falling on the blanking buffer arc plate (8) will fall on the partial upper position of the belt (10). And the slightly finer light particles and heavy particles falling from the slurry blanking buffer arc plate (8) corresponding to the slightly finer concentrate settlement groove area (4) will fall on the middle position of the belt (10), and from the 5th slightly The fine light particles and heavy particles falling from the pulp blanking buffer arc plate (8) corresponding to the fine particle concentrate settlement groove area will fall on the lower position of the belt (10). Then realize the distinction between coarse ore light particles and heavy particles, slightly finer light particles and heavy particles, and fine light particles and heavy particles at different positions on the belt (10), avoiding the confusion of ore pulp, and preparing for the next step of concentrate prepare. The running direction of the belt is counterclockwise, and the belt (10) will continue to move leftward with the pulp particles in different positions. When the flushing direction is at right angles, acute angles or obtuse angles to the running direction of the belt, then the impact force of the water will quickly wash away the light particles on the top of the slurry at different positions, leaving sediment on the belt (10 ) on the coarse grains, slightly finer grains and fine grained heavy minerals, and continue to move forward with the belt (10). On the belt (10), a plurality of pulp separation feeding parts (13) are arranged in total, and the lower ore ports of the pulp separation feeding part (13) are respectively arranged in the upper, middle and lower positions or more of the belt (10). locations. The purpose is that when the rightmost pulp sorting feeding part (13) is loaded and the heavy minerals deposited on the belt (10) move to the left through the second pulp sorting feeding part (13) It will not be disturbed by the impact force of the slurry generated during the new feeding process, and the heavy minerals that have settled on the belt (10) will be mixed with the light minerals on the top again to avoid the loss of heavy minerals. When the heavy minerals deposited on the belt (10) pass through the second pulp separation feeding part (13), although the top of the heavy minerals will be more or less covered by a layer of light minerals, however, the flushing port on the belt surface (11) position, the layer of light particle minerals on the surface of heavy minerals will soon be washed away, and it is difficult to cause the grade of heavy minerals to decrease. When all the heavy minerals run to the left along the belt (10) until they leave the discharge area of the feeding part (13) for all the pulp separation, they come to the concentrate enrichment area, and all the heavy minerals settle on the belt (10) ) on the heavy minerals will go through a long-distance flushing process, and the heavy minerals will be washed out from the belt (10) and recycled.

In a tin beneficiation plant, the ore tin grade is 0.42%. Gravity separation after ball mill grinding, the proportion of pulp particles after ball mill grinding: 9.5% on 100 mesh sieve, 50% between 100 mesh and 150 mesh, 20% between 150 mesh and 200 mesh, 200 mesh 10.5% to 325 mesh, 10% on the 325 mesh sieve; the following is a comparison of specific implementation data.

Specific implementation scheme one, shaker scheme

Shaking table scheme 1. The ore feed rate (dry ore) per hour is 1.2 tons, the recovery rate is 15%, the tailing is 0.35% (tin content), and the concentrate grade is 21%;

Shaking table plan 2. The ore feed rate (dry ore) per hour is 1 ton, the recovery rate is 20%, the tailing is 0.32% (tin content), and the concentrate grade is 28%;

Shaking table scheme 3. The amount of concentrate (dry ore) per hour is 2 tons, the recovery rate is 10%, the tailing is 0.38% (tin content), and the concentrate grade is 15%;

From the above scheme, the recovery rate of the shaking table is relatively low. The main reasons are as follows: 1. The pulp particles are not uniform, so that the fine-grained concentrate cannot reach the concentrate enrichment area. This part of the ore cannot be recycled; 2. The size of the ore feed will directly affect the recovery rate and grade.

Specific implementation plan 2. Disc rotary vibrating concentrator plan

Disc rotary vibrating concentrator scheme 1. The ore feed rate (dry ore) per hour is 2 tons, the recovery rate is 5%, the running tail is 0.4% (tin content), and the concentrate grade is 5%;

Disc rotary vibrating concentrator scheme 2. The ore feed rate (dry ore) per hour is 1.5 tons, the recovery rate is 10%, the running tail is 0.38% (tin content), and the concentrate grade is 8%;

Disc rotary vibrating concentrator scheme 3. The ore feed rate (dry ore) per hour is 1 ton, the recovery rate is 15%, the running tail is 0.35% (tin content), and the concentrate grade is 12%;

Disc rotary vibrating concentrator scheme 4. The ore feed rate (dry ore) per hour is 0.3 tons, the recovery rate is 40%, the running tail is 0.25% (tin content), and the concentrate grade is 18%;

The above scheme shows that the recovery rate of the disk vibration beneficiation machine will increase with the reduction of the ore intake. When the ore intake is reduced to 0.3 tons of dry ore/hour, the recovery rate will increase significantly. The reasons are as follows: firstly, the lower pulp opening of the circular vibrating concentrator is small, which determines that the pulp is scattered in a fan-shaped area. More pulp will flow through the open area, which is equivalent to the increase of the velocity of the pulp in the effective pulp spreading area, and the spreading surface of the pulp will be rectangular or strip-shaped, which will directly lead to the return of heavier mineral particles. It will be lost without having time to settle. Second, the effective settlement distance of the slurry is only 1.6 meters. The heavy minerals in the slurry have no time to settle in such a short distance, especially the fine-grained heavy minerals. Third, the coarse and fine particles in the slurry are uneven, which will disturb the effect of the layering of the slurry in the process of being subjected to shear force and friction on the disc surface.

Specific implementation plan three, belt shaker concentrator plan

Belt-type shaker concentrator scheme 1. The ore feed rate is 4 tons per hour (dry ore), the recovery rate is 20%, the running tail is 0.32% (tin content), and the concentrate grade is 10%;

Belt-type shaker concentrator scheme 2. The ore feed rate is 3 tons per hour (dry ore), the recovery rate is 30%, the running tail is 0.28% (tin content), and the concentrate grade is 15%;

Belt-type shaker concentrator scheme three, the ore feed rate is 2 tons per hour (dry ore), the recovery rate is 50%, the running tail is 0.21% (tin content), and the concentrate grade is 18%;

Belt-type shaker concentrator scheme 4. The ore feed rate is 1 ton per hour (dry ore), the recovery rate is 65%, the tailing is 0.15% (tin content), and the concentrate grade is 22%;

The above scheme shows that the recovery rate of the belt-type shaker beneficiation machine will increase with the reduction of the ore intake. When the ore intake is reduced to 1 ton of dry ore per hour, the recovery rate will increase significantly. Compared with the circular vibrating concentrator, both the processing capacity and the recovery rate should be significantly improved. The reason is that the ore inlet of the belt-type shaker concentrator adopts the side-feed method, and the spread area of the pulp is much larger than that of the disc rotary vibrating concentrator. However, there are also problems similar to those of the disc rotary vibrating concentrator, that is, the effective settlement distance of the pulp is not enough and the uneven thickness of the pulp leads to the settlement of the disordered pulp.

Specific embodiment four The mineral processing device of the present invention effectively improves the mineral processing production output

Increase the settling distance of the heavy particles in the pulp by the length of the slurry sorting feeding part (13); through the coarse concentrate settlement groove area (3), slightly fine concentrate settlement groove area (4) and 5 fine concentrate The coarse and fine particles in the slurry are effectively classified in advance in the sedimentation groove area, because the heights of the three kinds of concentrate sedimentation grooves are different, and the groove depth of the coarse concentrate sedimentation groove area (3) is relatively the shallowest. The coarsest particles are intercepted and the heavy minerals in the coarse particles are settled at the bottom of the groove. The groove depth of the finer concentrate sedimentation groove area (4) is slightly deeper than that of the coarse concentrate sedimentation groove area (3), which is used to intercept the finer particles one by one and remove the heavy minerals in the finer particles. settled at the bottom of the groove. 5. The groove in the groove area of fine concentrate settlement is the deepest, which is used to intercept the fine-grained minerals and settle the heavy minerals in the fine particles at the bottom of the groove. And the whole 13 ore pulp sorting feeding troughs are inclined to the right, which is convenient for the ore pulp to flow from the 3 coarse concentrate ore engraving groove area to the 5 tin concentrate ore engraving groove area. Thus, before entering the belt (10), the ore pulp has undergone coarse and fine separation, light and heavy separation. For easy further selection on the belt.

In order to verify the conclusion of the present invention, it is proved by following series of schemes and experiments.

Scheme 1, condition 1, grooves in the pulp separation feeding part (13), coarse concentrate settlement groove area (3), slightly fine concentrate settlement groove area (4) and 5 fine concentrate settlement groove area There is no change in height. Condition 2: The pulp sorting and feeding part (13) is horizontally fed to the belt (10);

Experimental data 1. Slurry sorting and feeding part (13), the ore feed rate is 6 tons per hour (dry ore), the recovery rate is 20%, the tailing is 0.3% (tin content), and the concentrate grade is 5%;

Experimental data 2. Slurry sorting and feeding part (13), the ore feed rate is 5 tons per hour (dry ore), the recovery rate is 25%, the tailing is 0.3% (tin content), and the concentrate grade is 15%;

Experimental data 3. Slurry sorting and feeding part (13), the ore feed rate is 4 tons per hour (dry ore), the recovery rate is 30%, the tailing is 0.28% (tin content), and the concentrate grade is 20%;

Experimental data 4. Slurry sorting and feeding part (13), the ore feed rate is 2 tons per hour (dry ore), the recovery rate is 60%, the tailing is 0.18% (tin content), and the concentrate grade is 22%;

According to the data of this scheme, the after-treatment volume and recovery rate of the concentrate feeding part have been increased to a certain extent. The main reason is that the effective settling distance of the pulp is increased and the mineral particles in the pulp are effectively stratified between light and heavy.

Scheme 2, condition 1, grooves in the pulp separation feeding part (13), the rough concentrate settlement groove area (3), the slightly fine concentrate settlement groove area (4) and the 5 fine concentrate settlement groove area The height increases in steps. Condition 2: The pulp sorting feeding part (13) and the ground form an angle inclined to the right to feed the belt (10);

Experimental data 1. Slurry sorting and feeding part (13), the ore feed rate is 6 tons per hour (dry ore), the recovery rate is 30%, the tailing is 0.28% (tin content), and the concentrate grade is 15%;

Experimental data 2. Slurry sorting and feeding part (13), the ore feed rate is 5 tons per hour (dry ore), the recovery rate is 40%, the tailing is 0.25% (tin content), and the concentrate grade is 20%;

Experimental data 3. Slurry sorting and feeding part (13), the ore feed rate is 4 tons per hour (dry ore), the recovery rate is 50%, the tailing is 0.22% (tin content), and the concentrate grade is 25%;

Experimental data 4. Slurry sorting and feeding part (13), the ore feed rate is 2 tons per hour (dry ore), the recovery rate is 65%, the tailing is 0.15% (tin content), and the concentrate grade is 30%;

According to the data of this program, the slurry separation feeding part (13) in the coarse concentrate settlement groove area (3), the slightly fine concentrate settlement groove area (4) and the 5 fine concentrate settlement groove area The height of the engraved groove is stepped up and the slurry separation feeding part (13) is inclined to the right with the ground. After feeding to the belt (10), compared with the previous scheme, no matter the recovery rate or the concentrate grade All have been greatly improved.

Scheme 3, condition 1, grooves in the pulp separation feeding part (13), the rough concentrate settlement groove area (3), the slightly fine concentrate settlement groove area (4) and the 5 fine concentrate settlement groove area The height increases in steps. Condition 2: The pulp sorting feeding part (13) and the ground form an angle inclined to the right to feed the belt (10). Condition 3: Add ore pulp blanking buffer arc plate (8) and not add ore pulp blanking buffer arc plate (8);

Experimental data 1. Increase the slurry blanking buffer arc plate (8). Slurry sorting and feeding part (13), the ore feed rate is 4 tons per hour (dry ore), the recovery rate is 60%, the tailing is 0.18% (tin content), and the concentrate grade is 26%

Experimental data two, do not increase the slurry blanking buffer arc plate (8). Slurry sorting and feeding part (13), the ore feed rate is 4 tons per hour (dry ore), the recovery rate is 50%, the tailing is 0.22% (tin content), and the concentrate grade is 25%;

According to the experimental data, the recovery rate increases by 10% after adding the slurry blanking buffer arc plate (8). , and the belt (10) is the level ground. A drop of a certain height will inevitably be formed between the pulp sorting feeding part (13) and the belt (10). When the pulp on the pulp sorting feeding part (13) falls from a certain height on the belt (10) , It is bound to disrupt the ore pulp layer that has been graded according to the severity. Underlying heavy mineral particles may be tumbled back to the surface, requiring re-sedimentation. Especially slightly finer and finer heavy mineral particles need to be settled again, the finer the mineral heavy particles, the slower the settling speed, and the longer the required settling distance. Cause a certain fine particle tailing phenomenon.

Scheme 4, condition 1, grooves in the pulp separation feeding part (13), the rough concentrate settlement groove area (3), the slightly fine concentrate settlement groove area (4) and the 5 fine concentrate settlement groove area The height increases in steps. Condition 2: The pulp sorting feeding part (13) and the ground form an angle inclined to the right to feed the belt (10). Condition 3: increase the slurry blanking buffer arc plate (8); condition 4: add or not add sprayers on the slurry blanking buffer arc plate (8);

Experimental data 1. Do not add sprayers. Slurry sorting and feeding part (13), the ore feed rate is 4 tons per hour (dry ore), the recovery rate is 60%, the tailing is 0.18% (tin content), and the concentrate grade is 26%;

Experimental data 2. Increase the sprayer. Slurry sorting and feeding part (13), the ore feed rate is 4 tons per hour (dry ore), the recovery rate is 65%, the tailing is 0.15% (tin content), and the concentrate grade is 30%;

According to the experimental data, there is a certain difference in the recovery effect between adding sprayers and not increasing sprayers. The reason is that the pulp on the pulp sorting feeding part (13) falls through the pulp blanking buffer arc plate (8). Falling on the belt (10), although the ore slurry is buffered, there is a small distance (about 3 mm) after all. When the ore slurry crosses this distance, there will be a small amount of tumbling phenomenon. If the ore slurry is tumbling, there will be a small amount of mineral particles. Contact with air, and then subjected to the tension phenomenon of water. Causes a small number of mineral particles to float on the surface of the water. lead to loss of minerals. If the sprayer is added, the water mist hits the floating mineral particles from top to bottom, thereby destroying the tension of the water. Once the tension of the water is broken, the floating minerals will immediately sink to the bottom. thereby increasing the recovery rate.

Scheme 5, condition 1, grooves in the pulp separation feeding part (13), the rough concentrate settlement groove area (3), the slightly fine concentrate settlement groove area (4) and the 5 fine concentrate settlement groove area The height increases in steps. Condition 2: The pulp sorting feeding part (13) and the ground form an angle inclined to the right to feed the belt (10). Condition 3: Increase the slurry blanking buffer arc plate (8). Condition 4: Add a sprayer on the slurry blanking buffer arc plate (8). Condition 5. One slurry separation feeding part (13) feeds to the belt shaker concentrator, two pulp separation feed parts (13) feeds to the belt shaker concentrator, three pulp separation The feeding part (13) feeds the belt shaker concentrator. Condition 6. Two or three pulp separation feeding parts (13) are fed to the belt (10). The tail edge of the discharge port of the pulp separation feeding part (13) is parallel to the running direction of the belt, and two or three The tailings edges of the discharge outlets of the three pulp separation feeding parts (13) are all flush on the same straight line. Condition seven, no additional 11 flushing devices;

Experimental data 1. A slurry sorting feeding part (13) feeds the belt (10). The ore feed rate is 4 tons per hour (dry ore), the recovery rate is 65%, the tailing is 0.15% (tin content), and the concentrate grade is 30%;

Experimental data 2. The feeding part (13) of two pulp separation feeds to the belt (10). The ore feed rate is 8 tons per hour (dry ore), the recovery rate is 55%, the running tail is 0.17% (tin content), and the concentrate grade is 25%;

Experimental data 3. The feeding part (13) of three pulp separation feeds to the belt (10). The ore feed rate is 12 tons per hour (dry ore), the recovery rate is 45%, the tailing is 0.22% (tin content), and the concentrate grade is 20%;

According to the experimental data, the output of each additional slurry sorting and feeding part (13) will be doubled, but as the output increases, the concentrate grade and recovery rate will decrease. The reason is that when the heavy minerals in the pulp discharged from the first pulp separation feeding part (13) settle on the belt (10), along with the operation of the belt (10), the next pulp separation feeding part (13) The position of the pulp outlet, since the pulp falls from the pulp sorting feeding part (13) onto the belt (10), the heavy minerals that have settled on the belt (10) will be stirred by the new pulp disturb. Since the 11 flushing device is not added at the position of the belt (10), there will be no water on the belt (10) when the pulp discharged from the first pulp separation feeding part (13) is running on the belt (10). The light minerals on the surface layer of the stratified pulp are washed away in time, and then enter the position of the pulp discharge outlet of the second pulp separation feeding part (13) and then enter the third pulp separation feeding part (13 ) The location of the pulp outlet. The repeated deposition of light minerals on the surface makes it difficult to wash away the light minerals on the surface at the end. Eventually lead to low pulp grade.

Scheme 6, Condition 1, grooves in the slurry separation feeding part (13), the rough concentrate settlement groove area (3), the slightly fine concentrate settlement groove area (4) and the 5 fine concentrate settlement groove area The height increases in steps. Condition 2: The pulp sorting feeding part (13) and the ground form an angle inclined to the right to feed the belt (10). Condition 3: Increase the slurry blanking buffer arc plate (8). Condition 4: Add a sprayer on the slurry blanking buffer arc plate (8). Condition 5. One slurry separation feeding part (13) feeds to the belt shaker concentrator, two pulp separation feed parts (13) feeds to the belt shaker concentrator, three pulp separation The feeding part (13) feeds the belt shaker concentrator. Condition 6. Two or three pulp separation feeding parts (13) feed into the belt (10), and the tail edge of the pulp separation feeding part (13) is not parallel to the running direction of the belt (see figure The left side is high and the right is low), and the position of the edge of the tailings at the discharge outlet of the feeding part (13) of two or three pulp separations on the belt (10) is also arranged in a stepped manner in a manner that the left is high and the right is low (according to icon). Condition 7. Add 11 flushing devices at the upper left position of the discharge port of each pulp separation feeding part (13);

Experimental data 1. The feeding part (13) of three pulp separation feeds to the belt (10). The ore feed rate is 12 tons per hour (dry ore), the recovery rate is 65%, the running tail is 0.15% (tin content), and the concentrate grade is 35%;

From the experimental data, the recovery rate and concentrate grade have been greatly improved when the processing capacity is increased. Investigate the reason, reason 1, because the edge of the tail end of the discharge port of the pulp separation feeding part (13) is not parallel to the belt running direction (see the figure, the left side is high and the right side is low), so, from the pulp separation feeding part (13) ) from the discharge outlet, the coarse mineral pulp will fall on the slightly upper position of the belt (10), the finer mineral pulp will fall on the slightly middle position of the belt (10), and the fine mineral pulp will fall on the belt (10) slightly lower position. Three kinds of pulp with different fineness fall on different positions of the belt. As the belt (10) enters the discharge port of the next pulp separation feeding part (13), the impact force of the water flow at the upper position is the largest, and the coarse pulp at the uppermost position can withstand the heavy weight due to its heavy weight. The force of the water flow will not be washed away. Reason 2: Since the pulp sorting feeding part (13) arranged on the belt (10) is stepped, the left side is high and the right side is low, and the heavy minerals that have been deposited on the belt (10) will not be sorted by the second pulp The position of the new ore slurry coming down from the feeding part (13) is successfully avoided, and will not be disturbed by the impact force of the new ore slurry. Reason three, because the (11) flushing device has been added on the belt (10), that layer of light ore pulp on the back surface of the loose stratification on the belt (10) can be washed away in time.

Claims (3)

1. A mineral processing device for effectively improving the yield of mineral processing production comprises two parts, namely a mineral pulp separation feeding part and a mineral collecting part; the method is characterized in that: the ore pulp sorting and feeding part (13) comprises an ore pulp material separating box (1), a clear water separating tank (6) and a concentrate settling and notching area; the concentrate settlement notching area is in a flat plate shape, and a flat plate installation plane of the concentrate settlement notching area and the ground form an included angle with a high left side and a low right side; the ore pulp distributing box (1) and the clear water distributing groove (6) are arranged on the left higher side of the flat plate of the concentrate settlement notch area side by side, so that an ore pulp discharging hole (2) at the bottom of the ore pulp distributing box (1) is aligned to a fine notch surface at the rear part of the concentrate settlement notch area, and a clear water outlet hole (7) at the bottom of the clear water distributing groove (6) is aligned to the highest area of the fine notch surface at the front part of the concentrate settlement notch area; an ore pulp blanking buffer arc plate (8) is arranged at the tail ore pulp outlet end at the front end part of the concentrate settlement notching area and is connected with the ore pulp outlet end; the connection of the ore pulp blanking buffer arc plates (8) is a movable connection, and the angles can be adjusted up and down or left and right according to different installation positions of the ore pulp sorting and feeding part (13);

the ore pulp separation feeding part comprises three ore concentrate settlement notching areas, namely a rough ore concentrate settlement notching area (3), a slightly fine ore concentrate settlement notching area (4) and a fine ore concentrate settlement notching area (5): the three types of groove areas have different groove depths and different widths; the groove depth of the rough concentrate settlement notching area (3) is the shallowest, the groove depth of the slightly fine concentrate settlement notching area (4) is shallower, and the groove depth of the fine concentrate settlement notching area (5) is the deepest;

the ore collecting part consists of a belt supporting roller (9) and a belt (10); a plurality of mineral particle damping belts (12) are arranged on the working surface of the belt (10) according to the running direction of the belt;

a rough concentrate settlement notching area (3), a slightly fine concentrate settlement notching area (4) and a fine concentrate settlement notching area (5) are sequentially arranged in a stepped manner on one side of the working surface of the belt (10) according to the running direction of the belt and the sequence of processing the concentrate thickness; the method comprises the following steps: the relative position of the belt (10) where the rough concentrate settling notching area (3) far away from the belt (10) is higher, the slightly-fine concentrate settling notching area (4) is slightly lower, and finally the slightly-fine concentrate settling notching area (5) is lowest;

the outlet ends of ore pulp at the tail parts of the three ore concentrate settlement notching areas form an included angle with the running direction of the belt, so that the coarse particle ore pulp, the slightly fine particle ore pulp and the fine particle ore pulp which are discharged from the three ore concentrate settlement notching areas through the ore pulp blanking buffering arc plates (8) which are respectively connected are ensured to respectively fall at different horizontal line positions of the belt (10); the horizontal line position setting of its concrete ore pulp descending is: the position of the coarse particle ore pulp is higher, the middle of the position of the slightly fine particle ore pulp is the lowest, and the position of the fine particle ore pulp is the lowest;

a plurality of belt surface flushing ports (11) are arranged on one side of the working surface of the belt (10) at intervals according to the running direction of the belt, and the flushing direction of the water ports is ensured to be at a right angle or a certain oblique angle with the running direction of the belt; the belt surface flushing ports (11) are arranged at intervals, namely, one belt surface flushing port (11) is arranged before the position of the ore pulp coming out from the end part of the next ore pulp separation feeding part (13) is reached from the position of the ore pulp coming out from the end part of the previous ore pulp separation feeding part (13);

the flat mounting plane of the concentrate settlement notching area and the ground form an included angle which is inclined from left to right and is 4-10 degrees;

the tail ore pulp outlet ends of the end parts of the three concentrate settling notching areas form included angles with the running direction of a belt, and the included angles are 20-45 degrees.

2. The beneficiation device according to claim 1, which effectively improves the yield of beneficiation production, and is further characterized in that: the granularity of the rough concentrate is 120-200 meshes; the granularity of the slightly fine concentrate is 200 meshes-325 meshes; the particle size of the fine concentrate is 325-600 mesh.

3. A mineral processing operation process using the mineral processing apparatus according to claim 1, which is effective for increasing the yield of mineral processing production, characterized in that: the operation process comprises feeding of an ore pulp distributing box (1), rough concentration and classification of a table concentrator and ore collection and transfer of a belt (10) to a concentrate enrichment area; the method comprises the following specific steps:

(1) starting the ore dressing device, conveying tailings to be sorted into an ore pulp distributing box (1) of a rough concentrate settling and notching area (3), controlling the water adding amount, and ensuring that the mass percentage concentration of ore pulp uniformly entering from an ore pulp discharging hole (2) at the bottom of the ore pulp distributing box (1) is adjusted to be 20-30%; in the rough concentrate settlement notching area (3), the coarse particle ore pulp with the granularity of 120-200 meshes settled at the bottom of the rough concentrate settlement notching area (3) is controlled by adjusting an ore pulp blanking buffer arc plate (8) under the action of friction force to land at the highest horizontal line position inside a belt (10);

(2) under the action of differential motion of the rough concentrate settlement notching area (3), the coarse-particle light minerals and the slightly-particle heavy minerals are gradually extruded to the top of the rough concentrate settlement notching area (3), under the action of clear water flushed out by clear water outlet holes (7) uniformly arranged at the bottom of a clear water diversion groove (6), slightly-particle tailings with the particle size smaller than 200 meshes, formed by the coarse-particle light minerals and the slightly-particle heavy minerals at the top of the rough concentrate settlement notching area (3), are flushed into an ore pulp distributing box of the slightly-particle ore pulp settlement notching area (4), the water adding amount of the ore pulp distributing box is controlled, and the mass percentage concentration of the ore pulp uniformly entering the ore pulp discharging holes (2) at the bottom of the ore pulp distributing box (1) is adjusted to 18-25%; in the slightly fine concentrate settlement notching area (4), ore pulp with slightly fine particles with the granularity of 200-325 meshes settled at the bottom of the slightly fine concentrate settlement notching area (4) is controlled by adjusting an ore pulp blanking buffer arc plate (8) under the action of friction force to fall at a higher horizontal line position in the middle of a belt (10);

(3) slightly fine light minerals and fine heavy minerals are gradually extruded to the top of the slightly fine ore settling and notching area (4) under the action of differential motion of the slightly fine ore settling and notching area (4), under the action of clear water flushed out by clear water outlet holes (7) uniformly arranged at the bottom of a clear water diversion groove (6), fine particle tailings with the particle size smaller than 325 meshes, formed by the slightly fine light minerals and the fine heavy minerals at the top of the slightly fine ore settling and notching area (4), are flushed into an ore pulp distributing box of the fine ore settling and notching area (5), the water adding amount of the ore pulp distributing box is controlled, and the mass percentage concentration of ore pulp uniformly entering the ore pulp discharging hole (2) at the bottom of the ore pulp distributing box (1) is regulated to 15-20%; in the fine concentrate settlement notching area (5), the bottom of the fine concentrate settlement notching area (5) settled is fine particle ore pulp with the granularity of 325-600 meshes, the settlement distance is controlled by adjusting an ore pulp blanking buffer arc plate (8) under the action of friction force, and the ore pulp falls on the lowest horizontal line position outside a belt (10);

(4) the three concentrates falling on the belt (10) are transferred along the running direction of the belt and are flushed through the belt surface flushing port (11) in sequence, so that light minerals contained in the top layer of the ore pulp are flushed away by water in different coarse and fine particle ore pulps positioned at different horizontal line positions of the belt (10), and the heavy minerals of coarse particles, slightly fine particles and fine particles which are left to be deposited on the belt (10) are transferred to a concentrate enrichment area through the belt (10); all slurries herein have been classified into coarse-grained heavy and coarse-grained light minerals, slightly fine-grained heavy and slightly fine-grained light minerals, fine-grained heavy and fine-grained light minerals; and preparing for next selection.

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