CN120815626A - A high-efficiency anti-blocking ilmenite pre-selection device and method - Google Patents
A high-efficiency anti-blocking ilmenite pre-selection device and methodInfo
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- CN120815626A CN120815626A CN202511139533.2A CN202511139533A CN120815626A CN 120815626 A CN120815626 A CN 120815626A CN 202511139533 A CN202511139533 A CN 202511139533A CN 120815626 A CN120815626 A CN 120815626A
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- ilmenite
- tailings
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- cavity
- blocking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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Abstract
本申请公开了一种高效防堵的钛铁矿预选装置，包括相互连通的垂直腔体和倾斜腔体，垂直腔体位于倾斜腔体的下方且外周部连接有上升水管，倾斜腔体内部容纳有形状尺寸全部相同的斜板，且倾斜腔体和所有的斜板从下往上的宽度逐渐缩小，上升水管用于向垂直腔体内输入水并用输入的水推动其中的低密度的矿物颗粒沿垂直腔体和倾斜腔体内的斜板向上运动，以使低密度的矿物颗粒从尾矿排出部推出去，并使高密度的钛铁矿从精矿排矿管落下去，实现钛铁矿的预选。该装置能够提升粗粒的预选钛铁矿的效果，实现预选钛精矿TiO2品位提升，降低进入浮选的物料量，防止预选过程中发生物料堵塞，提升生产效率。本申请还公开了一种高效防堵的钛铁矿预选方法。
The present application discloses an efficient and anti-blocking ilmenite preselection device, comprising a vertical cavity and an inclined cavity interconnected with each other. The vertical cavity is located below the inclined cavity and is connected to a rising water pipe on its outer periphery. The inclined cavity contains inclined plates of identical shape and size, and the width of the inclined cavity and all the inclined plates gradually decreases from bottom to top. The rising water pipe is used to input water into the vertical cavity and use the input water to push low-density mineral particles therein upward along the inclined plates in the vertical cavity and the inclined cavity, so that the low-density mineral particles are pushed out from the tailings discharge section and the high-density ilmenite falls from the concentrate discharge pipe, thereby achieving ilmenite preselection. The device can improve the effect of preselecting coarse-grained ilmenite, improve the TiO2 grade of preselected titanium concentrate, reduce the amount of material entering flotation, prevent material blockage during the preselection process, and improve production efficiency. The present application also discloses an efficient and anti-blocking ilmenite preselection method.
Description
Technical Field
The invention belongs to the technical field of comprehensive utilization of vanadium titano-magnetite, and particularly relates to an ilmenite preselection device and method with high efficiency and anti-blocking performance.
Background
The normal temperature specific strength of titanium is approximately 260 kN.m.kg -1, which is superior to high-strength steel and aluminum alloy, the surface of the titanium is provided with a TiO 2 passivation film of 2nm to 10nm, the titanium can be used in seawater, aqua regia and wet chlorine for a long time, the elastic modulus is 105GPa (close to bone tissue), the titanium implant is non-magnetic and non-cytotoxicity, the MRI compatibility of the implant is kept, the titanium alloy still keeps good toughness at minus 253 ℃, the titanium alloy is an ideal material of a liquid hydrogen/liquid oxygen storage tank, the Ti-Ni alloy can realize 8% recoverable strain, and the titanium alloy is used for vascular stents and satellite unfolding mechanisms and has excellent performances of titanium.
In the existing titanium smelting technology, the grade of TiO 2 of materials entering the flotation desulfurization titanium-selecting operation is generally 11-18%, and the grade of the flotation ilmenite concentrate TiO 2 is generally 45-47%, so that a large amount of sulfuric acid and other flotation reagents are required to be added, and the problems of high reagent consumption, serious equipment and pipeline corrosion and the like in the titanium-selecting operation are caused by high acidity. Therefore, there is a need to increase the grade of TiO 2 in the feed to the flotation operation to reduce the reagent consumption of the flotation operation.
The TFe content in the vanadium titano-magnetite iron tailings utilized in the prior art is about 13%, the TiO 2 content is about 9%, the grade of TiO 2 of the pre-selected concentrate of the single-purpose vertical-ring pulse high-gradient magnetic separator can only be improved to 14-15%, the operation recovery rate of TiO 2 of the pre-selected concentrate is only 65-75%, therefore, the pre-selection efficiency of ilmenite is low, the waste of titanium resources is caused, the problem that the thrust gradually weakens along with the upward movement of water flow exists in the existing pre-selection device, the high-position hydraulic power is insufficient to realize efficient pre-selection separation, and the inclined plate is blocked and is excessively high in maintenance cost.
Disclosure of Invention
In order to solve the problems, the invention provides the high-efficiency anti-blocking ilmenite preselection device and method, which can realize coarse and fine separation, improve the effect of coarse-grain ilmenite preselection, realize remarkable improvement of the grade of total titanium concentrate TiO 2, reduce the amount of materials entering flotation, save production cost, effectively prevent material blockage in the preselection process and improve production efficiency.
The invention provides an efficient anti-blocking ilmenite preselection device, which comprises a vertical cavity and an inclined cavity which are mutually communicated, wherein the vertical cavity is positioned below the inclined cavity, the periphery of the vertical cavity is connected with a rising water pipe, inclined plates with the same shape and size are accommodated in the inclined cavity, the width of the inclined cavity and the width of all the inclined plates from bottom to top are gradually reduced, a tailings discharge part is arranged above the inclined cavity, a stirring part is accommodated in the vertical cavity, the body of the vertical cavity is a cylinder, the lower part of the vertical cavity is a cone, the periphery of the body is provided with a mineral feeding pipe, a concentrate discharge pipe is arranged below the cone, and the rising water pipe is used for feeding water into the vertical cavity and pushing low-density mineral particles in the vertical cavity and the inclined cavity upwards by using the input water so as to enable the low-density mineral particles to be pushed out of the tailings discharge part from the tailings discharge part and enable high-density ilmenite to fall down from the concentrate discharge pipe, and the preselection of ilmenite is realized.
Preferably, in the above efficient anti-blocking ilmenite preselection device, the cross section of the inclined cavity is rectangular, the length of the rectangle of the lower port of the inclined cavity is 20cm to 25cm, the width is 17cm to 18cm, the length of the rectangle of the upper port of the inclined cavity is 17cm to 18cm, the width is 15cm to 16cm, and the inclination angle of the inclined cavity relative to the horizontal plane is 65 ° to 75 °.
Preferably, in the above efficient anti-blocking ilmenite preselection device, the inclined plates have smooth surfaces, the distance between adjacent inclined plates is 1.5mm to 6.0mm, and the length of the inclined plates is 120cm to 180cm.
Preferably, in the above efficient anti-blocking ilmenite preselection device, the body of the vertical cavity is in a cylindrical shape with a diameter of 30cm to 40cm and a height of 40cm to 60 cm.
Preferably, in the above efficient anti-blocking ilmenite preselection device, the rising water pipe is disposed at a connection portion of the body and the cone, and the number of the rising water pipes is 6 to 8, and the rising water pipes are 1cm to 2cm in diameter and uniformly distributed along an outer peripheral portion of the cone.
Preferably, in the above efficient anti-blocking ilmenite preselection device, an included angle between a conical surface of the cone and a horizontal plane is 50 ° to 70 °, a diameter of the concentrate discharge pipe is 1cm to 2cm, and a concentrate discharge valve is further arranged on the concentrate discharge pipe, and the device further comprises a discharge replenishing pipe arranged at a connection part of the concentrate discharge pipe and the cone;
the tailings discharge part comprises a tailings collecting tank and a tailings discharge pipe with the diameter of 2cm to 4 cm.
Preferably, in the above efficient anti-blocking ilmenite preselection device, the stirring component comprises a stirring impeller, and a stirring shaft and a transmission component connected with the stirring impeller.
Preferably, in the above efficient anti-blocking ilmenite preselection device, the ore feeding pipe is disposed at a middle height position of the body and has a diameter of 1cm to 2cm.
Preferably, in the above efficient anti-blocking ilmenite preselection device, the device further comprises a frame for supporting the vertical cavity and the inclined cavity.
The invention provides a high-efficiency anti-blocking ilmenite preselection method which comprises the following steps:
S1, separating slag from iron tailings by using a high-frequency vibrating screen, wherein a first undersize product enters a step S2, and a first oversize product enters a step S6;
S2, carrying out weak magnetic iron removal on the first undersize product by utilizing a permanent magnetic cylinder type magnetic separator, removing ferromagnetic minerals, and enabling the obtained iron-removed tailings to enter a step S3;
S3, performing ilmenite preselection on the iron-removed tailings by using a vertical ring pulsating high gradient magnetic separator to obtain first magnetic concentrate and first magnetic tailings;
s4, performing ilmenite pre-selection on the first magnetic separation tailings by adopting a vertical ring pulsating high gradient magnetic separator to obtain second magnetic separation concentrate and second magnetic separation tailings, taking the second magnetic separation tailings as first tailings, and merging the second magnetic separation concentrate and the first magnetic separation concentrate into a step S5;
S5, classifying the first magnetic concentrate and the second magnetic concentrate by adopting a high-frequency vibration sieve, wherein the obtained second oversize product enters a step S6, and the second undersize product enters a step S7;
S6, enabling the first oversize product and the second oversize product to enter ore grinding operation, and conveying the obtained ore grinding and ore discharging pump to the step S1;
S7, classifying the second undersize product by adopting a cyclone, and enabling the obtained settled sand to enter a step S8 and the obtained overflow to enter a step S10;
s8, the settled sand enters a stirring barrel, water is added to adjust the concentration of ore pulp, and the settled sand is fed into the step S9 by a pump;
S9, adjusting the ore feeding speed, the rising water amount, the stirring speed and the ore discharging speed of the ilmenite preselecting device according to the grade of the concentrate and the tailing TiO 2, the blocking condition of the ores at the two ends of the long side along the cross section of the inclined plate, the concentration of the tailings and the concentration of ore pulp in the inclined cavity by utilizing the ilmenite preselecting device to obtain first preselecting titanium concentrate and first preselecting tailings;
S10, performing ilmenite preselection on overflow by using a vertical ring pulsating high gradient magnetic separator to obtain second preselection titanium concentrate and second preselection tailings;
And S11, combining the first pre-selected titanium concentrate and the second pre-selected titanium concentrate to be used as pre-selected titanium total concentrate, and combining the first tailings, the first pre-selected tailings and the second pre-selected tailings to be used as total tailings.
According to the efficient anti-blocking ilmenite preselection device provided by the invention, as the rising water pipe is used for inputting water into the vertical cavity and pushing low-density mineral particles in the vertical cavity and the inclined plates in the inclined cavity to move upwards by using the input water, so that the low-density mineral particles are pushed out of the tailing discharging part, and the high-density ilmenite falls down from the concentrate discharging pipe to preselect ilmenite, coarse and fine separation is realized, coarse-grain preselection ilmenite effect is improved, the grade of total preselect titanium concentrate TiO 2 is obviously improved, the amount of materials entering flotation is reduced, production cost is saved, and as the inclined plates with the same shape and size are accommodated in the inclined cavity, the inclined cavity and all inclined plates gradually shrink from bottom to top, the more upward water flow speed is higher, material blockage can be effectively prevented from occurring in the preselection process, and production efficiency is improved. The ilmenite preselection method with high efficiency and anti-blocking performance has the same advantages.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of an embodiment of a high efficiency anti-fouling ilmenite preselection apparatus provided by the present invention;
FIG. 2 is a left side view of the tilt chamber;
FIG. 3 is a schematic illustration of an embodiment of a high efficiency anti-clogging ilmenite preselection method provided by the present invention.
Detailed Description
The invention has the core of providing an efficient anti-blocking ilmenite preselecting device and method, which can realize coarse and fine separation, improve the effect of coarse-grain ilmenite preselecting, realize remarkable improvement of the grade of total titanium concentrate TiO 2, reduce the amount of materials entering flotation, save production cost, effectively prevent material blockage in the preselecting process and improve production efficiency.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the anti-blocking ilmenite preselection device provided by the invention is shown in fig. 1, fig. 1 is a schematic diagram of the embodiment of the anti-blocking ilmenite preselection device provided by the invention, the embodiment of the anti-blocking ilmenite preselection device can comprise a vertical cavity 1 and an inclined cavity 2 which are mutually communicated, the vertical cavity 1 is positioned below the inclined cavity 2, the periphery of the vertical cavity is connected with a rising water pipe 3, the vertical cavity 1 and the inclined cavity 2 can be transited by using a reverse cone 9 and can be connected in a welding mode, no gap is ensured, water is not leaked out, the rising water pipe 3 is used for inputting water into the interior, the shape and the size of the rising water pipe 3 are not limited, the flow of each rising water pipe 3 can be independently controlled, the inclined cavity 2 is internally provided with a sloping plate 4 with the same shape and size, the inclined plates 4 are parallel to each other and arranged in the inclined cavity 2 at certain intervals, the space between the adjacent inclined plates 4 can accommodate water and mineral particles to pass through, and referring to fig. 2, which is a left side view of the inclined cavity, the inclined cavity 2 and all the inclined plates 4 gradually reduce in width from bottom to top, so that the water can flow upwards with the gradually reduced cross-sectional area from bottom to top, the flow velocity of the water becomes larger and larger, thereby the mineral particles can be driven to flow upwards more and more quickly, the channel blockage can be effectively avoided, the free flowing space of the surfaces of the inclined plates 4 is ensured, the width change of the inclined plates is consistent with the width change of the inclined cavity 2, so that gaps between the inclined plates in the width direction can be avoided, the tailing discharging part 5 can be arranged above the inclined cavity 2, and the tailing can be carried out from the part, the vertical cavity 1 can be internally provided with a stirring part 6 for realizing the separation from the titanium concentrate, so that the entered materials can be uniformly stirred and dispersed, the blocking caused by lump together is avoided, the stirring speed of the stirring part 6 can be independently regulated and controlled, the body 101 of the vertical cavity 1 is a cylinder, the lower part is a cone 102, most of water flow can not go downwards but only upwards, thereby providing a basis for the material separation, the periphery of the body 101 is provided with a feeding pipe 7, minerals can enter the body 101 from the feeding pipe 7 for separation, the lower part of the cone 102 is provided with a concentrate discharging pipe 8, the ilmenite concentrate can fall out from the position due to high density and gravity resistance, the separation is realized, specifically, the rising water pipe 3 is used for inputting water into the vertical cavity 1 and pushing low-density mineral particles therein to move upwards along the inclined plates 4 in the vertical cavity 1 and the inclined cavity 2 by using the input water, so that the low-density mineral particles are pushed out from the tailing discharging part 5, and high-density ilmenite is dropped from the concentrate discharging pipe 8, the preselection of ilmenite is realized, the low-density mineral particles continuously move upwards along the surface of the inclined plates 4 under the action of water, and the high-density ilmenite cannot move upwards along the surface of the inclined plates 4 due to larger gravity ratio, but continuously moves downwards, and finally drops from the concentrate discharging pipe 8, so that the effective separation of the two particles is realized.
As can be seen from the above description, in the embodiment of the efficient anti-blocking ilmenite preselection device provided by the invention, since the rising water pipe 3 is used for inputting water into the vertical cavity 1 and pushing the low-density mineral particles therein to move upwards along the inclined plates 4 in the vertical cavity 1 and the inclined cavity 2 by using the input water, so that the low-density mineral particles are pushed out from the tailings discharge portion 5, and the high-density ilmenite falls from the concentrate discharge pipe 8 to realize the preselection of ilmenite, the effect of coarse-grain separation can be realized, the effect of remarkably improving the grade of the total preselected titanium concentrate TiO 2 is realized, the amount of materials entering the flotation is reduced, the production cost is saved, and the inclined cavity 2 and all the inclined plates 4 gradually shrink from bottom to top, so that the more upward water flow speed is larger, the material blocking in the preselection process can be effectively prevented, and the production efficiency can be improved.
In one specific embodiment of the above efficient anti-blocking ilmenite preselection device, the cross section of the inclined cavity 2 is rectangular, the length of the rectangle of the lower port of the inclined cavity 2 is 20cm to 25cm, the width is 17cm to 18cm, the length of the rectangle of the upper port of the inclined cavity 2 is 17cm to 18cm, the width is 15cm to 16cm, and the inclination angle of the inclined cavity 2 with respect to the horizontal plane is 65 ° to 75 °. It can be seen that in this embodiment the length of the rectangle of the lower port of the tilting chamber 2 is smaller than the length of the rectangle of the upper port, and the width of the rectangle of the lower port is also smaller than the width of the rectangle of the upper port, so that a gradually decreasing cross section from bottom to top is formed, thereby ensuring that the water flow speed from bottom to top is faster and faster, better avoiding clogging, ensuring a higher pre-selection efficiency, and in a further preferred example the length of the rectangle of the lower port of the tilting chamber 2 is 23.5cm, the width is 18cm, the length of the rectangle of the upper port of the tilting chamber 2 is 18cm, the width is 16cm, and the tilting angle of the tilting chamber 2 with respect to the horizontal plane is 70 °.
In another embodiment of the above-described efficient anti-clogging ilmenite preselection device, the inclined plates 4 may have a smooth surface so that no clogging of the particles is caused, and the spacing between adjacent inclined plates 4 is 1.5mm to 6.0mm, which may be dependent on the size of the mineral particles to be treated, and when the mineral particles are larger, a larger inclined plate spacing is selected, and vice versa, the length of the inclined plate 4 is 120cm to 180cm, further preferably 150cm, and the water flow through this length is sufficient to drive the mineral particles to flow out from the upper part, achieving a better separation, and if the length is too short, an effective separation may not be achieved.
In yet another specific embodiment of the above-described high efficiency anti-clogging ilmenite preselection device, the body 101 of the vertical cavity 1 may be in the shape of a cylinder with a diameter of 30cm to 40cm and a height of 40cm to 60 cm. In one embodiment, the diameter may preferably be 30cm and the height 50cm, so as to provide a space for agitation of sufficient size to allow uniform dispersion of both mineral particles and water entering the space to ensure effective separation. The number of the ascending water pipes 3 is 6 to 8, the diameter is 1cm to 2cm, the number of the ascending water pipes 3 is 8, the diameter is 1.5cm, and the ascending water pipes are uniformly distributed along the periphery of the cone 102, so that water can be fed to all the positions, the uniformity of water power is better, and mineral particles at all the positions can be stably moved.
In a preferred embodiment of the above efficient anti-blocking ilmenite preselection device, the included angle between the conical surface of the cone 102 and the horizontal plane is 50 ° to 70 °, and further preferably 60 °, so that a gradual reduced cross-sectional area form can be provided to avoid excessive impact caused by water supply, the diameter of the concentrate discharge pipe 8 is 1cm to 2cm, and further preferably 1.5cm, which can be determined according to the size of ilmenite concentrate, and with continued reference to fig. 1, the concentrate discharge pipe 8 is further provided with a concentrate discharge valve 10, so that when the concentrate is discharged according to actual demands, and the size of the discharge flow rate can be controlled at the end of the concentrate discharge pipe 8, the concentrate can be rapidly discharged by suction of the pump, the concentrate discharge pipe 11 arranged at the connection position of the concentrate discharge pipe 8 and the cone 102 can be effectively diluted by the aid of the concentrate discharge pipe 11, so that blockage is not easy, the concentrate discharge pipe 5 can specifically comprise a tailing collecting groove with a tailing diameter of 2cm to 501 cm, and the tailing collecting groove can be more preferably arranged at the end of 501 cm, and the tailing collecting groove can be more uniformly discharged from the tailing collecting groove to 502, and the tailing collecting efficiency can be more preferably guaranteed at the end of 502 cm.
In another preferred embodiment of the above-mentioned anti-blocking ilmenite preselection device, the stirring unit 6 may include a stirring impeller 601, a stirring shaft 602 and a transmission unit 603 connected thereto, so that the transmission unit 603 may be connected to an external motor, and the rotation of the motor may be transmitted to the stirring shaft 602 to rotate the stirring shaft, so that the stirring impeller 601 may be driven to stir in a vertical cavity, thereby stirring materials more uniformly and effectively dispersing, and the stirring speed may be controlled.
In a further preferred embodiment of the above-described high-efficiency anti-clogging ilmenite preselection device, the feed tube 7 may be arranged at an intermediate height position of the body 101 and have a diameter of 1cm to 2cm. The mineral is thus fed into and stirred from a position intermediate the height of the body 101, so that the stirring space is larger and the diameter is preferably 1.5cm, although a larger diameter feeder tube 7 is chosen when it is desired to treat a larger diameter mineral, which can be selected according to the actual needs and is not limited thereto. Furthermore, with continued reference to fig. 1, the efficient anti-blocking ilmenite preselection device may further include a frame 12 for supporting the vertical cavity 1 and the inclined cavity 2, so that the vertical cavity 1 and the inclined cavity 2 may be more firmly fixed together, loosening of the whole device caused by vibration is avoided, and the specific frame 12 may be configured according to the shape and size of each cavity, which is not limited herein.
An embodiment of a method for pre-selecting ilmenite with high efficiency and blocking prevention provided by the invention is shown in fig. 3, and fig. 3 is a schematic diagram of an embodiment of a method for pre-selecting ilmenite with high efficiency and blocking prevention provided by the invention, and the method can comprise the following steps:
S1, separating slag from iron tailings by using a high-frequency vibrating screen, wherein a first undersize product enters a step S2, and a first oversize product enters a step S6;
Specifically, the high-frequency vibrating screen can effectively separate coarse particle impurities (slag separation) from recyclable fine particle minerals in tailings in a high-frequency and low-amplitude vibrating mode, and is particularly suitable for iron ore tailings treatment with the granularity of 0.074-0.6 mm.
S2, carrying out weak magnetic iron removal on the first undersize product by utilizing a permanent magnetic cylinder type magnetic separator, removing ferromagnetic minerals, and enabling the obtained iron-removed tailings to enter a step S3;
It should be noted that this step allows to remove ferromagnetic minerals, such as magnetite, maghemite, ferrosilicon impurities, avoiding interfering with the subsequent high intensity magnetic separation or flotation step.
S3, performing ilmenite preselection on the iron-removed tailings by using a vertical ring pulsating high gradient magnetic separator to obtain first magnetic concentrate and first magnetic tailings;
it is noted that more than 70% of tailings can be thrown away, the grade of titanium dioxide is improved by 2.5 to 4 times, and the operation recovery rate is not less than 75%.
S4, performing ilmenite pre-separation on the first magnetic separation tailings by using a vertical ring pulsating high gradient magnetic separator to obtain second magnetic separation concentrate and second magnetic separation tailings, taking the second magnetic separation tailings as the first tailings, and combining the second magnetic separation concentrate and the first magnetic separation concentrate to enter a step S5;
it can be seen that after such more primary ilmenite preselections, the grade of ilmenite can be further upgraded.
S5, classifying the first magnetic concentrate and the second magnetic concentrate by adopting a high-frequency vibration sieve, wherein the obtained second oversize product enters a step S6, and the second undersize product enters a step S7;
it should be noted that this step can further screen concentrates of different sizes for facilitating subsequent separate processing.
S6, enabling the first oversize product and the second oversize product to enter grinding operation, and conveying the obtained grinding and discharging pump to the step S1;
The two oversize products are all gathered into the same ore grinding system to form a closed circuit of two-stage ore grinding and two-time classification, and the granularity of-0.045 mm is more than or equal to 80 percent as the final fineness target, so that the dissociation of ilmenite monomers is ensured.
S7, classifying the second undersize product by adopting a cyclone, and enabling the obtained settled sand to enter a step S8 and the obtained overflow to enter a step S10;
Therefore, the products can be continuously classified according to different granularity, and the subsequent separate treatment is convenient.
S8, the settled sand enters a stirring barrel, water is added to adjust the concentration of ore pulp, and the settled sand is fed into the step S9 by a pump;
in this case, the sand setting is continuously diluted so as to facilitate the subsequent process treatment.
S9, utilizing the high-efficiency anti-blocking ilmenite preselection device according to any one of the above steps, and according to the grade of concentrate and tailing TiO 2, the blocking condition of ores at two ends along a long side of a sloping plate section, the concentration of the tailings and the concentration of ore pulp in an inclined cavity, adjusting the ore feeding speed, the rising water quantity, the stirring speed and the ore discharging speed of the ilmenite preselection device to obtain first preselection titanium concentrate and first preselection tailings;
It should be noted that, because this kind of high-efficient anti-blocking ilmenite preselection device can prevent to block up, consequently this step also can be more smooth and easy going on, guarantee the high efficiency of work.
S10, performing ilmenite preselection on overflow by using a vertical ring pulsating high gradient magnetic separator to obtain second preselection titanium concentrate and second preselection tailings;
Specifically, after this step, the overflow can be further preselected, thereby further upgrading it.
And S11, combining the first pre-selected titanium concentrate and the second pre-selected titanium concentrate to obtain a pre-selected titanium total concentrate, and combining the first tailings, the first pre-selected tailings and the second pre-selected tailings to obtain a total tailings.
Therefore, the grade of ilmenite can be improved to a greater extent by utilizing the steps, so that excessive treatment liquid is not required to be added in the subsequent steps, and the production cost is greatly saved.
In summary, the method adopts the iron tailings-slag separation-weak magnetic iron removal-high magnetic field strength strong magnetic separation to preselect ilmenite (the recovery rate of ilmenite is improved by one-stage roughing and one-stage scavenging), the high-frequency vibration screen of the strong magnetic concentrate, the coarse grain grinding return slag separation, the fine grain cyclone classification and concentration, the cyclone sand setting adopts the ilmenite preselecting device for preselecting ilmenite-overflow, the strong magnetic preselecting ilmenite process is adopted, the preselecting titanium concentrate product with high TiO 2 content is obtained, the product can directly meet the requirement of flotation granularity, the material amount entering the flotation operation is obviously reduced, a foundation is laid for further economic utilization of ilmenite by utilizing vanadium titano-magnetite, and the anti-blocking effect is better.
The above apparatus and method are described in detail below with a specific comparative example:
The results obtained by the conventional process for concentrating a section of strong magnetic concentrate by using a SLon500-1.5T vertical ring pulsating high gradient magnetic separator are shown in Table 1, and Table 1 is a table of results obtained by using the conventional process. The "pair operation" in the table is calculated by taking the feed of the operation as 100%, and the "pair iron tailings" is calculated by taking the iron tailings as 100%.
Table 1 results obtained by conventional procedure
The device and the method provided by the application are as follows in detail:
The main physical and chemical properties of the adopted ore are that the iron ore tailings sample contains TFe 14.25%、TiO2 9.22%、V2O50.02%、SiO2 43.32%、CaO 10.22%、MgO 7.35%、Al2O3 4.28%、MnO 0.13%、S 0.25%, samples with the grain size of-0.074 mm accounting for 63.11%, wherein the samples contain 37.27% of pyroxene, 25.08% of ilmenite, 9.60% of radfor, 9.38% of amphibole, 4.58% of olivine, 3.95% of anorthite, 2.94% of titano-magnetite, 1.74% of albite, 1.24% of sphene, 0.96% of pyrrhotite, less mineral content and 88.09% of ilmenite monomer dissociation degree.
The test procedure was as follows:
(1) Adding the dry iron tailings into a hopper of a10 cm multiplied by 10cm pendulum feeder, adjusting a valve of the pendulum feeder to 100kg/h, adding water to adjust the concentration to 40%, and feeding the mixture into a KM-800-4S high-frequency vibrating screen by a vertical sand pump to screen and separate slag, wherein the diameter of a screen hole is 1.0mm, and enabling a product on the screen to automatically flow into an operation (6);
(2) The low-intensity magnetic separation iron removal, namely feeding the undersize product into a XCRS-phi 400 multiplied by 300 drum type magnetic separator, wherein the magnetic field strength is 3500Oe, the magnetic separation concentrate is used as secondary iron concentrate, and the magnetic separation tailings are fed into the operation (3) by a vertical sand pump;
(3) The method comprises the steps of pre-separating ilmenite by strong magnetism, namely, adjusting the magnetic field intensity of an SLon500-1.5T vertical ring pulsating high gradient magnetic separator to 8000Oe, the stroke to 35mm, the stroke frequency to 350 times/min, and the swivel to 2.5rad/min, performing strong magnetic separation to obtain strong magnetic separation tailings, and performing the operation (4), and performing the operation (5) on the strong magnetic separation concentrate;
(4) The strong magnetic scavenging pre-selecting ilmenite, namely recycling ilmenite by adopting an SLon500-1.5T vertical ring pulsating high gradient magnetic separator, adjusting the magnetic field strength to 10000Oe, the stroke to 35mm, the stroke frequency to 350 times/min, and the rotating ring to 2.0rad/min, and performing strong magnetic separation to obtain strong magnetic separation tailings serving as tailings 1, wherein the strong magnetic separation concentrate enters (5) operation;
(5) The high-frequency vibrating screen classification, namely, strong magnetic concentrate of the steps (3) and (4) automatically flows into a KM-800-4S high-frequency vibrating screen to be screened, the diameter of a screen hole is 0.18mm, the products on the screen automatically flow into an operation (6), and the products under the screen flow into an operation (7);
(6) The oversize products of the ore grinding (1) and (5) automatically flow into an XMB-phi 420 multiplied by 600 continuous ball mill, and the ore discharge pump of the mill is used for the operation (1);
(7) Classifying the cyclone, namely classifying the product under the screen in the step (5) by adopting a phi 25 cyclone, controlling the underflow concentration of the cyclone to be 40%, and automatically flowing to the step (8), wherein the overflow of the cyclone automatically flows to the step (10);
(8) Sizing, namely adding water into the settled sand of the cyclone by adopting an XDT-15L stirring barrel to adjust the concentration to 30%, and feeding the settled sand into the cyclone by using a pump (9);
(9) The ilmenite is preselected by utilizing the efficient anti-blocking ilmenite preselection device, wherein the ascending water flow of the efficient anti-blocking ilmenite preselection device is regulated to be 2.2L/min, the stirring speed is 100rad/min, the ore discharging speed is 0.6L/min, and a 3mm inclined plate is adopted to obtain preselected titanium concentrate 1 and tailings 2;
(10) Pre-separating ilmenite by strong magnetic separation, namely pre-separating ilmenite overflowed by a cyclone in step (7) by adopting an SLon500-1.5T vertical ring pulse high-gradient magnetic separator, adjusting the magnetic field strength to 10000Oe, the stroke to 35mm, the stroke frequency to 350 times/min, and the rotating ring to 3.0rad/min, and performing strong magnetic separation to obtain strong magnetic separation concentrate serving as pre-selected titanium concentrate 2 and tailings serving as tailings 3;
(11) The pre-selected titanium concentrate 1 and the pre-selected titanium concentrate 2 are total pre-selected titanium concentrates, and the tailings 1, the tailings 2 and the tailings 3 are total tailings.
The results obtained using the apparatus and method provided by the present application are shown in table 2, and table 2 is a table of results obtained using the apparatus and method provided by the present application.
Table 2 results table obtained using the apparatus and method provided by the present application
As can be seen from a comparison of the two tables, by using the device and the method provided by the application, the total preselected titanium concentrate with the yield of 19.71% and the recovery rate of TiO 2 32.26%、TiO2 of 68.75% can be obtained, compared with the conventional process, the grade of the preselected titanium concentrate TiO 2 is improved by 13.50%, the recovery rate of TiO 2 is improved by 6.60%, the amount of materials entering the flotation operation is reduced by 10.82%, and the reduction is up to 35.44%.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
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| CN202511139533.2A CN120815626A (en) | 2025-08-14 | 2025-08-14 | A high-efficiency anti-blocking ilmenite pre-selection device and method |
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