CN114812100A - Mineral dewatering equipment and process - Google Patents

Abstract

A mineral dewatering device and a manufacturing process utilize a microwave mixing device to generate microwave and then irradiate the microwave to minerals, so that the viscosity of mineral soil is reduced, the minerals are further refined, the structure of the minerals is loosened, on one hand, the total surface area of the mineral soil is increased, on the other hand, the retention force of the mineral soil to moisture is weakened, the heating area of the minerals is increased in the subsequent heating process of a rotary furnace, the moisture is easily separated from the mineral soil, the moisture in the minerals is easily evaporated, the moisture content is greatly reduced, and the moisture content of the minerals can be reduced from the range of 30-35% to the range of 12-17%.

Description

Mineral water removal equipment and process

technical field

The invention relates to the technical field of mineral processing, in particular to a mineral water removal equipment and a manufacturing process.

Background technique

Most of the extraction of various metals is to first extract ore or ore from the ore vein, and then transport the ore or ore to the refining unit or factory, and then extract the metal, such as iron ore, aluminum ore or nickel ore, etc. For some minerals with high water content, such as laterite-type bauxite and nickel ore, the existing treatment method is to directly transport the ore to the destination refining unit or factory, and the refining unit or factory first After removing moisture, it enters the refining process.

This existing processing method makes the mineral soil with high water content transported from the mining field to the refining plant, thus increasing the transport weight, and for the same volume of cargo ships or trucks, the volume of the mineral soil that can be transported each time Reduced, resulting in an increase in the cost of transportation, and the refinery plant needs to build water removal equipment, which also increases the construction cost of the refinery plant and complicates the process.

In addition, the existing mine soil water removal equipment is to heat the mineral soil to remove water. Since the mineral soil contains clay and other highly viscous substances, the direct heating method can remove a limited amount of water within a given time.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a mineral water removal equipment and process, the mineral can be chopped first by a mineral crushing device, and then the viscosity of the mineral can be reduced by a microwave mixing device, and the particle size of the mineral can be further refined. , and finally enter the rotary furnace for heating, which greatly reduces the water content.

The technical means adopted in the present invention are as follows.

An embodiment of the mineral water removal equipment of the present invention includes a mineral crushing device, a first microwave mixing device and a rotary furnace. The mineral crushing device includes a crushing piece, which chops the mineral so that the particle size of the mineral before entering the mineral crushing device is larger than the particle size of the mineral after leaving the mineral crushing device. The first microwave mixing device includes a first microwave cavity, a first conveying member and a plurality of first microwave generating parts. The first microwave generating parts generate microwaves and transmit them into the first microwave cavity. The first conveying The component is arranged in the first microwave cavity, and transmits the mineral from the feed port to the discharge port of the first microwave cavity. The rotary furnace includes a rotary furnace body and a heater, the mineral enters the rotary furnace body and rotates with the rotary furnace body, and the heater heats the mineral located inside the rotary furnace body. The mineral passes through the mineral crushing device, the first microwave mixing device and the rotary furnace in sequence, and the water content of the mineral is reduced from a range of 30% to 35% to a range of 12% to 17%.

An embodiment of the mineral water removal process of the present invention includes: a raw soil providing step: providing a mineral raw soil, the mineral raw soil has a first water content; a crushing step: shredding the mineral raw soil through a mineral pulverizing device The first microwave mixing step: reduce the viscosity of the minced minerals through a first microwave mixing device and further crush them; heating step: heat the crushed minerals through a rotary furnace to remove moisture and further crush materialized to obtain a second mineral grain, the second mineral grain has a second water content; wherein the first water content is in the range of 30% to 35% and the second water content is 12% to 17% scope.

The mineral water removal equipment and process of the present invention utilizes a microwave mixing device to generate microwaves and then irradiate the minerals to reduce the viscosity of the mineral soil, further refine the minerals, and loosen the structure of the minerals. The increase of the total surface area, on the other hand, weakens the retention of water by the mineral soil, so that in the subsequent heating process of the rotary furnace, the heating area of the mineral increases, and the water is easily separated from the mineral soil, which makes the water in the mineral easy to evaporate, and greatly Reduce moisture content.

Description of drawings

FIG. 1 is a perspective view of an embodiment of the first microwave mixing device or the second microwave mixing device of the present invention.

FIG. 2 is a top view of the first microwave mixing device or the second microwave mixing device of FIG. 1 .

FIG. 3 is a front view of the first microwave mixing device or the second microwave mixing device of FIG. 1 .

FIG. 4 is a cross-sectional view of the first microwave mixing device or the second microwave mixing device of FIG. 1 .

FIG. 5 is a schematic diagram of the first microwave mixing device or the second microwave mixing device of FIG. 1 performing microwave mixing processing on minerals.

FIG. 6 is a rear view of the first microwave mixing device or the second microwave mixing device of FIG. 1 .

FIG. 7 is an enlarged view of a microwave generating member of the first microwave mixing device or the second microwave mixing device of FIG. 1 .

8 is a cross-sectional view of another embodiment of the first microwave mixing device or the second microwave mixing device.

9 is a cross-sectional view of yet another embodiment of a first microwave mixing device or a second microwave mixing device.

FIG. 10 is a schematic diagram of an embodiment of the mineral water removal device of the present invention.

FIG. 11 is a schematic diagram of an embodiment of the rotary furnace of the mineral water removal apparatus of FIG. 10 .

FIG. 12 is a graph showing the distance and temperature between the interior of the rotary furnace of FIG. 11 and the feed port.

FIG. 13 is a schematic view of the rotary furnace of the mineral water removal equipment of FIG. 10 heating the minerals.

14 is a schematic diagram of an embodiment of the process of removing water from minerals through the mineral water removing equipment of the present invention.

15 is a schematic diagram of another embodiment of the process of removing water from minerals through the mineral water removing equipment of the present invention.

FIG. 16 is a flow chart of an embodiment of the mineral water removal process of the present invention.

Description of drawing numbers:

10: Microwave mixing device

11: Microwave cavity

12: Microwave generator

13: Conveyor parts

16: Transformer device

17: Drive unit

18: First Pedestal

19: Water-cooled system

20: Mineral crushing device

30: The first microwave mixing device

40: Rotary furnace

41: Rotary furnace body

42: Heater

43: Roller

44: Second base

50: Second microwave mixing device

60: Feeding device

70: Conveyor

80: Transport equipment

100: Mineral water removal equipment

111: Feed port

112: Outlet

113: Feed Hopper

115: Air intake

116: exhaust port

117: Airflow generator

131: Shaft body

132: Spiral Plate

181: Support frame

182: Carrier Plate

183: Working Ladder

191: Water inlet pipe

192: Drainpipe

193: Deputy

194: valve body

195: Hose

411: Feed port

412: Outlet

B: Bearing

S1: Steps to provide original soil

S2: Feeding step

S3: Crushing step

S4: The first microwave mixing step

S5: Second microwave mixing step

S6: Heating step

S7: the conveying step.

Detailed ways

Please refer to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , which illustrate an embodiment of the first microwave mixing device or the second microwave mixing device of the present invention. The microwave mixing device 10 of the present invention includes a microwave cavity 11 , a plurality of microwave generating parts 12 and a conveying part 13 .

The microwave cavity 11 is a hollow cavity, which has a feeding port 111 and a feeding port 112 . The feeding port 111 and the discharging port 112 are respectively disposed at opposite ends of the microwave cavity 11 . The feeding port 111 has a feeding hopper 113 , the feeding hopper 113 is upright facing upward, and the minerals enter the microwave cavity 11 through the feeding port 111 through the guidance of the feeding hopper 113 . The discharge port 112 faces below the microwave cavity 11 , and the minerals after microwave treatment leave the microwave cavity 11 from the discharge port 112 . As used herein, "above" refers to a direction away from the ground, and "below" refers to a direction toward the ground.

As shown in FIG. 1 and FIG. 2 , the microwave generating elements 12 are inserted into the shell of the microwave cavity 11 , each microwave generating element 12 has a microwave emitting end, and the microwave emitting end is located in the microwave cavity 11 , and the microwave emitting end emits Microwaves are irradiated to the minerals delivered to the microwave cavity 11 , and since the microwave cavity 11 in this embodiment is made of metal, the microwaves can be continuously reflected by the microwave cavity 11 and repeatedly irradiated to the minerals. In this embodiment, the microwave cavity 11 is a polygonal cavity. As shown in FIG. 1 , the microwave cavity 11 is formed by twelve rectangular metal plate parts that are arranged in pairs along a circumscribed cylindrical surface to form a cylindrical shape. The structure of the upper half (180 degrees) of the six rectangular metal plates, each rectangular metal plate is provided with two columns of holes, so there are 12 columns of holes in total, and each hole is provided with a microwave generator Piece 12. In this embodiment, the microwave generating element 12 is a magnetron. The magnetron has a center cathode, an anode surrounding the center cathode, and magnets arranged at both ends of the cathode and the anode in the axial direction. The magnetic field generated by the magnets at both ends generates microwaves in the resonant cavity between the cathode and the anode, and the generated microwaves are transmitted to the microwave cavity 11 through the antenna at the microwave transmitting end. Since the magnetron requires high voltage, a plurality of transformer devices 16 are arranged on both sides of the microwave cavity 11 to convert the voltage of the mains (110V or 220V) into the high voltage (4000V) required by the magnetron.

As shown in FIG. 4 , the conveying member 13 is disposed in the microwave cavity 11 . The conveying member 13 in this embodiment is a screw device, which includes a shaft body 131 and a spiral plate 132 , and the spiral plate 132 is along the axial direction of the shaft body 131 . set up. Both ends of the shaft body 131 are rotatably supported by bearings B, respectively. Please also refer to FIG. 1 and FIG. 3 , one end of the shaft body 131 is connected to a driving device 17 , and the driving device 17 drives the shaft body 131 to rotate to make the spiral plate 132 rotate. In this embodiment, the driving device 17 is an electric motor. The output shaft of the driving device 17 is connected to the shaft body 131 via a coupling, so that the driving device 17 can drive the shaft body 131 to rotate.

Please refer to FIG. 4 and FIG. 6 , a plurality of air inlets 115 are provided at one end of the microwave cavity 11 close to the discharge port 112 , and an exhaust port 116 is provided at the end of the microwave cavity 11 close to the feeding hopper 113 . The air inlet 115 is provided with a plurality of airflow generating members 117. In this embodiment, the airflow generating members 117 are fans. The fan rotates to drive the air into the microwave cavity 11 to generate airflow in the microwave cavity 11. Port 116 exits.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the microwave cavity 11 , the microwave generating part 12 , the conveying part 13 , the transformer device 16 and the driving device 17 are arranged on a first base 18 . The first base 18 includes a support frame 181 , a plurality of bearing plates 182 and a working ladder 183 . As shown in FIG. 3 , in order to make the conveyance of minerals in the microwave cavity 11 smoother, the support frame 181 is set to have an inclined angle with the ground, and is inclined downward from the feeding port 111 to the discharging port 112 . In this way, in addition to pushing the minerals from the feeding port 111 to the discharging port 112 by the conveying member 13 , the minerals can also be transported from the feeding port 111 to the discharging port 112 by gravity by using the inclined support frame 181 . As shown in FIG. 1 and FIG. 2 , the carrier plate 182 is arranged between the microwave cavity 11 and the transformer device 16 and on both sides of the driving device 17 , and the working ladder 183 is erected on one side of the support frame 181 , and the operator can work The ladder 183 climbs to the carrier plate 182 for maintenance or operation.

As shown in FIG. 5 , after the mineral particles are put into the feeding hopper 113 , they enter the microwave cavity 11 through the feeding port 111 by the guidance of the feeding hopper 113 , and the conveying member 13 disposed in the microwave cavity 11 pushes the minerals The pellets advance along the axial direction, and at this time, the microwave generating member 12 generates microwaves and transmits the microwaves into the microwave cavity 11 to irradiate the mineral pellets. The temperature of the mineral grains is raised by rotating the water molecules in the mineral grains by means of microwaves, causing the mineral molecules to oscillate. As the temperature rises, part of the water and the dust of the mineral particles rises to be suspended in the microwave cavity 11 , and the air flow generated by the airflow generator 117 in the microwave cavity 11 displaces the moisture and dust through the exhaust port 116 discharge. After the mineral particles are irradiated by microwave, the mineral particles will not only reduce the water content, but also make the structure of the mineral particles looser, reduce the viscosity of the mineral particles, and crack the mineral particles into smaller particle sizes. Small pellets.

As shown in FIG. 7 , the microwave generating element 12 of the present embodiment is a magnetron, and a water-cooling system 19 is used to cool the anode of the magnetron. The water-cooled system 19 includes a water inlet pipe 191 and a drain pipe 192 . The water inlet pipe 191 and the drain pipe 192 are provided with a plurality of auxiliary pipes 193 . 12. The anode of the microwave generator 12 is surrounded by a water jacket, and the cooling water passes through the water jacket from the water inlet pipe 191 through the auxiliary pipe 193, the valve body 194 and the hose 195, and absorbs the heat generated by the anode, and the cooling water whose temperature increases It enters the drain pipe 192 via the hose 195 , the valve body 194 and the auxiliary pipe 193 .

FIG. 8 shows another embodiment of the first microwave mixing device or the second microwave mixing device of the present invention. In this embodiment, the microwave generating elements 12 are arranged in a staggered arrangement on the microwave cavity 11 .

Figure 9 shows yet another embodiment of the first microwave mixing device or the second microwave mixing device of the present invention. In this embodiment, the microwave generating elements 12 are arranged closely (with a small spacing) on the rectangular metal plate near the top of the microwave cavity 11 , and the microwave generating elements 12 are arranged on the rectangular metal plate near the bottom of the microwave cavity 11 . They are arranged more evacuated (larger spacing).

Please refer to FIG. 10 , FIG. 11 , FIG. 14 , and FIG. 15 , which are an embodiment of the mineral water removal device of the present invention. The mineral water removal device 100 of the present invention includes a mineral crushing device 20 , a first microwave mixing device 30 and a rotary furnace 40 . The mineral water removal equipment of this embodiment is suitable for ore soils with high viscosity and high water content (latterite bauxite, nickel soil). Minerals excavated from the mine have a water content of 30% to 35%.

The minerals are delivered to the mineral crushing device 20 , which includes a crushing piece that shreds the minerals so that the particle size of the minerals before entering the mineral crushing device 20 is larger than that after the minerals leave the mineral crushing device 20 . In this embodiment, the mineral crushing device 20 is a crusher, which can be a single-shaft, double-shaft or four-shaft crusher. After the minerals are chopped by the mineral pulverizing device 20 , particles with a particle size of less than 20 cm are formed, which are uniformly discharged and transported to the first microwave mixing device 30 .

The first microwave mixing device 30 may be the microwave mixing device shown in FIGS. 1 to 9 . The first microwave mixing device 30 includes a first microwave cavity (such as the aforementioned microwave cavity 11 ), a first conveying member (such as the aforementioned conveying member 13 ), and a plurality of first microwave generating parts (such as the aforementioned microwave generating member 13 ) component 12), the first microwave generating components generate microwaves and transmit them into the first microwave cavity, and the output power of the first microwave mixing device is in the range of 100 kilowatts to 140 kilowatts. The first conveying member is disposed in the first microwave cavity, and conveys the minerals from the feeding port (such as the aforementioned feeding port 111 ) to the discharging port (such as the aforementioned feeding port 112 ) of the first microwave cavity body. The first microwave mixing device 30 is for minerals. Through the first microwave mixing device 30, the temperature of the minerals can be increased by microwaves to remove part of the water, so that the water content is slightly reduced to 31%, and the bonds of crystal water are broken. The viscosity of the minerals is destroyed, the organic matter in the mineral soil is decomposed and no longer intertwined with each other, and the particle size of the minerals is reduced.

As shown in FIG. 11 and FIG. 13 , the rotary furnace 40 includes a rotary furnace body 41 and a heater 42 . The minerals enter the rotary furnace body 41 and rotate with the rotary furnace body 41 , and the heater 42 is located inside the rotary furnace body 41 . mineral heating. There is a roller 43 below the rotary furnace body 41 , the roller 43 is driven to rotate by a motor, and the rotary furnace body 41 is supported by the roller 43 and rotates with the roller 43 . The rollers 43 are arranged on a second base 44, and the second base 44 is arranged to have an inclination angle relative to the ground, so that the minerals can move in the rotary furnace body 41 by gravity to achieve the conveying effect. The height of the feed port 411 of the rotary furnace body 41 relative to the ground is greater than the height of the discharge port 412 of the rotary furnace body 41 relative to the ground. The heater 42 is a diesel burner and is arranged at the end of the rotary furnace body 41. The heater 42 generates a flame in the rotary furnace body 41 and heats the minerals moving in the rotary furnace body 41 to a temperature range of 430°C to 470°C. In order to remove the moisture of the minerals, the minerals pass through the rotary furnace body 41 to form pellets with a moisture content in the range of 12% to 17% and a mineral particle size of less than 1.5 cm. FIG. 12 is a graph showing the temperature of the rotary furnace 40 and the distance from the feed port 411 in this embodiment. It can be seen from FIG. 12 that the temperature in the middle part of the rotary furnace 40 is the highest, exceeding 700 degrees Celsius, and the temperature at the inlet 411 and the outlet 412 is the lowest, between 200 and 300 degrees Celsius.

As shown in FIGS. 10 and 14 , the mineral water removal device 100 of the present invention further includes a second microwave mixing device 50 , and the mineral particles processed by the first microwave mixing device 30 are transported to the second microwave mixing device 50 , the second microwave mixing device 50 may be the microwave mixing device shown in FIG. 1 to FIG. 11 . The second microwave mixing device 50 includes a second microwave cavity (such as the aforementioned microwave cavity 11 ), a second transport member (eg, the aforementioned transport member 13 ), and a plurality of second microwave generating members (eg, the aforementioned microwave generating member) 12), the second microwave generating members generate microwaves and transmit them into the second microwave cavity, and the output power of the second microwave mixing device is in the range of 60 kilowatts to 100 kilowatts. The second conveying member is disposed in the second microwave cavity, and conveys the minerals from the feeding port (such as the aforementioned feeding port 111 ) to the discharging port (such as the aforementioned feeding port 112 ) of the second microwave cavity body. The second microwave mixing device 50 is for minerals. Through the second microwave mixing device 50, the temperature of the minerals can be increased by microwave to remove part of the water again, so that the water content is slightly reduced to 30%, and the crystal water is interrupted at the same time. The bonding of the minerals destroys the viscosity of the minerals and reduces the particle size of the minerals, and the minerals form particles with a particle size of less than 4 cm when they are output through the second microwave mixing device 50 . After the minerals are irradiated with microwaves through the second microwave mixing device 50 , they are transported to the above-mentioned rotary furnace 40 .

The coupling model of soil moisture evaporation rate is shown in the following two relations:

E _w =(ΔR _n +γE _aw )/(Δ+γA)

E _aw =0.35(1+0.146u _w )e _aw (BA)

where E _w is the evaporation rate (mm/day), Δ is the slope of the relationship between saturated vapor pressure and temperature, R _n is the net radiation (W/m ² ), γ is the psychrometric constant (kPa/°C), and u _w is Wind speed (km/hr), _eaw is the vapor pressure of the soil surface (mm-Hg), A is the reciprocal of the relative humidity of the air, and B is the reciprocal of the relative humidity of the soil surface. When the mineral water removal equipment 100 of the present invention processes the minerals in the devices of each treatment stage, the theoretical value of the water content of the mineral in each stage (the data calculated by the above-mentioned soil moisture evaporation rate coupling model) and the experimental value ( The comparison of the actual data) is as follows:

FIG. 15 shows another embodiment of the mineral water removal apparatus 100 of the present invention. This embodiment has a part of the same structure as the embodiment of FIG. 14 , and the same elements are given the same symbols and their descriptions are omitted. The difference between this embodiment and the embodiment of FIG. 14 is that this embodiment further includes a feeding device 60 and a conveying device 70 , and minerals are fed into the feeding device 60 by a shovel, so as to avoid directly feeding the minerals into the mineral crushing device 20 . impact on the equipment. The minerals are transported to the mineral crushing device 20 from the feeding device 60 . In this embodiment, the feeding device 60 may be a vibrating feeder, and the conveying device 70 may be a conveyor belt, and the minerals heated by the rotary furnace 40 are conveyed to a transport device 80, such as a cargo ship or a truck, through the conveying device 70.

FIG. 16 shows an embodiment of the mineral water removal process of the present invention, which includes: a raw soil providing step S1, a crushing step S3, a first microwave mixing step S4, and a heating step S6. In this embodiment, the mineral water removal process of the present invention further includes a second microwave mixing step S5. In this embodiment, the mineral water removal process of the present invention further includes a feeding step S2. In this embodiment, the mineral water removal process of the present invention further includes a conveying step S7.

In step S1, it provides raw soil. Step S1: providing a mineral raw soil, and the mineral raw soil has a first water content. In this embodiment, the mineral raw soil is a mineral soil with high viscosity and high water content (latterite bauxite, nickel soil). Minerals excavated from the mine have a water content of 30% to 35%. Then proceed to step S2.

In step S2, it is the feeding step S2: the ore raw soil is put into the above-mentioned feeding device 60, and is transported to the mineral crushing device 20 through the feeding device 60. Then proceed to step S3.

In step S3, it is a crushing step S3: the raw mineral soil is shredded through the above-mentioned mineral crushing device 20. The mineral pulverizing device 20 is a crusher, and after the minerals are chopped by the mineral pulverizing device 20, particles with a particle size of less than 20 cm are formed, which are uniformly discharged. Then proceed to step S4.

In step S4, it is the first microwave mixing step S4: the minced minerals are reduced in viscosity through a first microwave mixing device 30 and further crushed, so that the water content is slightly reduced to 31%, and the crystallization is interrupted. The bonding of water destroys the viscosity of the minerals and reduces the particle size of the minerals, and the minerals form particles with a particle size of less than 4 cm when they are output through the first microwave mixing device 30 . Then proceed to step S5.

In step S5, it is the second microwave mixing step S5: the minerals processed in the first microwave step are reduced in viscosity through the second microwave mixing device 50 and further crushed. The water content is slightly reduced to 30%, which further destroys the viscosity of the minerals, and reduces the particle size of the minerals. Then proceed to step S6.

In step S6, it is a heating step S6: the crushed minerals are heated through the above-mentioned rotary furnace 40 to remove moisture and further crushed to obtain a mineral pellet, and the mineral pellet has a second water content. The rotary furnace body 41 of the rotary furnace 40 rotates to turn the minerals, while the heater 42 generates a flame in the rotary furnace body 41 to heat the minerals in the rotary furnace body 41 to remove moisture to obtain mineral pellets. The second moisture content is in the range of 12% to 17%. Next, go to step S7.

In step S7, conveying step S7: the mineral pellets are conveyed to the conveying device 80 via the above-mentioned conveying device 70.

The mineral water removal equipment and process of the present invention utilizes a microwave mixing device to generate microwaves and then irradiate the minerals to reduce the viscosity of the mineral soil, further refine the minerals, and loosen the structure of the minerals. The increase of the total surface area, on the other hand, weakens the holding power of the mineral soil to water, so that in the subsequent heating process of the rotary furnace, the heating area of the mineral increases, and the water is easily separated from the mineral soil, which makes the water in the mineral easy to evaporate, and greatly Reduce moisture content.

Claims (15)

1. A mineral dewatering apparatus for reducing the water content of a mineral, characterised in that the mineral dewatering apparatus (100) comprises:

a mineral comminution apparatus (20) including comminution means for comminuting the mineral to a particle size greater than the particle size of the mineral after it has left the mineral comminution apparatus (20) prior to entry into the mineral comminution apparatus (20);

a first microwave mixing device (30) which comprises a first microwave cavity, a first conveying piece and a plurality of first microwave generating pieces, wherein the first microwave generating pieces generate microwaves and emit the microwaves into the first microwave cavity, and the first conveying piece is arranged in the first microwave cavity and conveys the minerals from a feeding hole of the first microwave cavity to a discharging hole;

a rotary furnace (40) including a rotary furnace body (41) and a heater (42), the mineral entering the rotary furnace body (41) and rotating with the rotary furnace body (41), the heater (42) heating the mineral inside the rotary furnace body (41);

wherein the mineral passes through the mineral crushing device (20), the first microwave mixing device (30) and the rotary furnace (40) in sequence, and the water content of the mineral is reduced from the range of 30% to 35% to the range of 12% to 17%.

2. The mineral dewatering apparatus of claim 1, including a second microwave mixing device (50) including a second microwave chamber, a second conveyor member and a plurality of second microwave generating members, the plurality of second microwave generating members generating microwaves and emitting the microwaves into the second microwave chamber, the second conveyor member being disposed in the second microwave chamber and conveying the minerals from the feed inlet to the discharge outlet of the second microwave chamber, the minerals passing through the mineral crushing device (20), the first microwave mixing device (30), the second microwave mixing device (50) and the rotary oven (40) in sequence.

3. The mineral dewatering apparatus of claim 2, characterized in that the second conveying member of the second microwave mixing device (50) is a screw extending in the axial direction of the second microwave cavity.

4. The mineral dewatering apparatus of claim 2, characterized in that the mineral is formed into pellets having a particle size of less than 4 cm by the first microwave mixing device (30) and the second microwave mixing device (50).

5. The mineral dewatering apparatus of claim 2, characterized in that the output of the first microwave mixing device (30) is in the range of 100 to 140 kwa and the output of the second microwave mixing device (50) is in the range of 60 to 100 kwa.

6. The mineral dewatering apparatus of claim 1, characterized in that the first conveying member of the first microwave mixing device (30) is a screw member extending in the axial direction of the first microwave cavity.

7. The mineral dewatering apparatus of claim 1, characterized in that the heater (42) of the rotary kiln (40) is a burner.

8. The mineral dewatering apparatus of claim 5, wherein the rotary furnace (40) heats the mineral to a temperature in the range of 430 ℃ to 470 ℃.

9. The mineral dewatering apparatus of claim 1, characterized in that the rotary furnace body (41) of the rotary furnace (40) has an angle of inclination with respect to the ground, the height of the feed opening (411) of the rotary furnace body (41) with respect to the ground being greater than the height of the discharge opening (412) of the rotary furnace body (41) with respect to the ground.

10. The mineral dewatering apparatus of claim 1, characterized in that the mineral is shredded by the mineral comminution means (20) into particles having a size of less than 20 cm.

11. The mineral dewatering apparatus of claim 1, including an inlet means (60) and a conveyor means (70), the mineral being conveyed to the mineral reducing means (20) via the inlet means (60), the mineral heated by the rotary kiln (40) being conveyed to a conveyor means (80) via the conveyor means (70).

12. A mineral dewatering process, comprising:

a raw soil providing step (S1): providing raw mineral soil, wherein the raw mineral soil has a first water content;

a crushing step (S3): cutting the raw mineral soil by a mineral crushing device;

a first microwave mixing step (S4): reducing the viscosity of the cut minerals through a first microwave mixing device and further crushing the minerals;

a heating step (S6): heating the crushed mineral through a rotary furnace to remove water and further crushing the crushed mineral to obtain mineral particles, wherein the mineral particles have a second water content;

wherein the first moisture content is in the range of 30% to 35% and the second moisture content is in the range of 12% to 17%.

13. The mineral dewatering process of claim 12, including a second microwave mixing step (S5): the mineral processed in the first microwave step (S4) is passed through a second microwave mixing device to reduce viscosity and further reduce the mineral into particles.

14. The mineral dewatering process of claim 13, including an input step (S2): the raw ore soil is conveyed to the mineral crushing device through a feeding machine.

15. The mineral dewatering process of claim 12, including a conveying step (S7): the mineral particles are transported to a transport device by a transport device.

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