A multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator

Abstract

The invention discloses a multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator, which belongs to the technical field of magnetic separation material distribution, and comprises a frame provided with an excitation coil; a separation barrel passes through the excitation coil, and the upper and lower magnetic poles inside the separation barrel form a separation chamber, and a first partition plate divides the separation chamber into a plurality of sub-separation chambers, and a magnetic medium is arranged in the sub-separation chamber; a plurality of material channels are arranged on the upper and lower magnetic poles; a second partition plate is arranged in the material mixing chamber to divide the material mixing chamber into a plurality of sub-mixing chambers; a jet hood with a plurality of jet holes is arranged in the sub-mixing chamber; a feed port is arranged at the upper end of the material distribution chamber, a flow guide hood is arranged inside, and a jet pipe is arranged at the lower end, and the inner diameter of the jet pipe gradually increases in the direction away from the material distribution chamber; the ore pulp enters the material distribution chamber through the feed port, and the ore pulp is distributed to the plurality of jet pipes under the guidance of the flow guide hood, diffuses outward under the constraint of the inner wall surface of the jet pipe, is sprayed into the material mixing chamber and covers the entire jet hood, and is sprayed into the separation barrel through the jet holes, so as to improve the uniformity of the ore pulp material distribution.

Description

Technical Field

[0001] The invention relates to the technical field of large-scale electromagnetic slurry high-gradient magnetic separation material distribution for iron removal and purification of non-metallic ores, and in particular to a multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator. Background Art

[0002] Electromagnetic slurry high gradient magnetic separator is mainly used for iron removal and purification of fine-grained materials such as non-metallic minerals such as quartz, feldspar, kaolin, etc. At the same time, it can also be used for wastewater treatment in steel mines and power plants.

[0003] In recent years, with the widespread application of electromagnetic slurry high-gradient magnetic separators, the sorting efficiency has been continuously improved, and the large-scale sorting equipment has become a development trend; the electromagnetic slurry high-gradient magnetic separator works in a cyclical manner, and an upper and lower magnetic pole is arranged in the sorting cylinder, and a magnetic medium is arranged between the upper and lower magnetic poles; an excitation coil is arranged around the sorting cylinder, and the excitation coil is energized to magnetize the magnetic medium in the sorting cavity, and the magnetized magnetic medium has a strong ability to adsorb magnetic objects; when the slurry is magnetically separated, the slurry enters and passes through the magnetic medium through the pipeline, and the magnetic matter in the slurry is adsorbed on the magnetic medium. After the magnetic matter is adsorbed, the slurry is discharged through the lower magnetic pole and the pipeline. After the magnetic medium in the sorting cylinder is fully adsorbed, the program is switched to flush and unload the iron, and the magnetic matter is discharged. Each cycle is a working cycle.

[0004] The magnetic medium of the electromagnetic slurry high gradient magnetic separator is usually compressed by steel plate mesh, thin steel rods, etc., with a high filling rate and small pores. When the magnetic medium is flushed and unloaded with iron, there are problems such as uneven flow resistance in some areas or accumulation and consolidation of magnetic materials. Therefore, during operation, the magnetic medium needs to be cleaned regularly every 10-30 days or so. The working efficiency is relatively low, and the output can only be increased by increasing the number of equipment or increasing the separation cavity.

[0005] In long-term applications, in order to increase the output of a single machine, the diameter of the equipment's sorting chamber has been increased from 1m to 2m, and gradually increased to 2.5-3.5m. The slurry processing volume has doubled, and the processing cost per ton of ore has continued to decrease; however, as the size of the equipment's sorting chamber gradually increases, the sorting area of ​​the magnetic medium and the slurry flow rate increase accordingly. At this stage, only multi-tube and multi-point dispersion can be used for distribution, resulting in a complex distribution structure, poor processability, and poor uniformity of equipment distribution, which seriously affects the iron removal effect; and, when the diameter of the sorting chamber increases, the diameter of the mesh medium or rod medium filled inside also increases, resulting in an increase in the cost of magnetic medium products, a large amount of disassembly and cleaning work, a long cycle, and poor convenience.

[0006] Therefore, it is an urgent problem to be solved at this stage to develop and design an improved structure that can improve the uniformity of slurry distribution and iron removal and purification effect, reduce the cost of magnetic media and the difficulty of cleaning, and an easy-to-operate multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator. Summary of the invention

[0007] In order to solve the problems existing in the prior art, the present invention provides a multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator. The slurry enters the distribution chamber through the feed port, and is evenly distributed to multiple injection pipes under the guidance of the guide cover. The gradually increasing aperture of the injection pipe allows the slurry to expand and diffuse outward under the constraint of the inner wall of the injection pipe, and is sprayed into the material mixing chamber and covers the entire spray cover. The slurry is evenly sprayed into the separation barrel through the spray holes on the spray cover, effectively improving the uniformity of the slurry distribution. At the same time, when unloading iron, when the flushing water passes through the magnetic medium to flush the ore, there will be no blind area for unloading iron, the ore is unloaded cleanly, and there is little residue, which effectively improves the iron removal and purification effect and the sorting index.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] The present invention provides a multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator, comprising:

[0010] A frame, wherein an excitation coil is arranged on the frame;

[0011] A vertically arranged sorting barrel passes through the excitation coil; an upper magnetic pole and a lower magnetic pole are arranged in the sorting barrel, a sorting cavity is formed between the upper magnetic pole and the lower magnetic pole, a first partition is arranged in the sorting cavity, the first partition divides the sorting cavity into a plurality of sub-sorting cavities, and magnetic media are arranged in each of the sub-sorting cavities; a plurality of through material channels are arranged at each of the sub-sorting cavities corresponding to the upper magnetic pole and the lower magnetic pole respectively;

[0012] a material mixing chamber, the material mixing chamber is arranged at the upper end of the sorting cylinder and is connected to the sorting cylinder, a second partition is arranged in the material mixing chamber, the second partition divides the material mixing chamber into a plurality of circumferentially distributed sub-material mixing chambers, the sub-material mixing chambers correspond to the sub-sorting chambers in a vertical direction one by one; a jet cover is arranged in the sub-material mixing chamber to divide the sub-material mixing chamber in a vertical direction, and a plurality of jet holes are arranged on the jet cover;

[0013] A material distribution chamber is arranged above the material sizing chamber, a feed port is arranged at the upper end of the material distribution chamber, a flow guide cover is arranged in the material distribution chamber, and a spray pipe corresponding to the sub-sizing chamber on a one-to-one basis is arranged at the lower end of the material distribution chamber, the spray pipe is communicated with the sub-sizing chamber, a plurality of the spray pipes are distributed around the flow guide cover, the inner diameter of the spray pipe gradually increases in the direction away from the material distribution chamber, and the axis of the spray pipe is arranged to be inclined downward along the radial direction of the sorting barrel.

[0014] As a preferred technical solution, a grid-shaped flow groove is provided on the end surface of the upper magnetic pole and / or the lower magnetic pole close to the magnetic medium, and the grid-shaped flow groove connects a plurality of the material channels.

[0015] As a preferred technical solution, the upper end surface of the lower magnetic pole corresponding to each of the sub-sorting cavities is set to be an inverted cone.

[0016] As a preferred technical solution, the spray cover is in a spherical shape convex downward;

[0017] And / or, a plurality of the jet holes are evenly distributed on the jet cover.

[0018] As a preferred technical solution, the air guide cover is conical.

[0019] As a preferred technical solution, the number of the sub-sorting chambers is set to 2-6;

[0020] And / or, the plurality of sub-sorting cavities are distributed along the circumferential direction, and the cross-section of the sub-sorting cavity is fan-shaped;

[0021] And / or, the injection pipe is trumpet-shaped, the cross section of the injection pipe is fan-shaped, and the angle of the fan-shaped is set to 60°-120°.

[0022] As a preferred technical solution, the axes of the sorting barrel, the sorting cavity, the material-splitting cavity, the material-distributing chamber, the feed inlet and the flow guide cover are all collinear;

[0023] and / or, the diameter of the sorting chamber is not less than 2 m;

[0024] And / or, the outside of the excitation coil is wrapped with a magnetic conductor, and the magnetic conductor is fixed on the frame.

[0025] As a preferred technical solution, it also includes a discharge cavity, which is arranged at the lower end of the sorting cylinder and communicated with the sorting cylinder, and the lower end of the discharge cavity is provided with a discharge port.

[0026] As a preferred technical solution, a third partition is provided in the discharge chamber, and the third partition divides the discharge chamber into a plurality of circumferentially distributed sub-discharge chambers, and the sub-discharge chambers correspond one-to-one with the sub-sorting chambers in the vertical direction; a downflow channel is provided at the lower end of the sub-discharge chamber, and the downflow channel is connected to the discharge port.

[0027] As a preferred technical solution, an inclined guide plate is provided in the sub-discharging chamber.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. During the slurry feeding process, the present invention utilizes the gradually increasing aperture of the injection pipe. The slurry expands and diffuses outward under the constraint of the inner wall of the injection pipe, and is injected into the material mixing chamber and covers the entire spray cover. The spray cover is covered with a plurality of spray holes, and the total flow rate of the plurality of spray holes is less than the flow rate of the injection pipe. The slurry is instantly filled in the material mixing chamber and forms a certain pressure. Under the action of the pressure, the slurry is synchronously sprayed downward at each spray hole, so that the slurry evenly enters the separation chamber from the material channel inside the upper magnetic pole, effectively improving the uniformity of the slurry distribution.

[0030] 2. When the slurry flows to the lower end surface of the upper magnetic pole of the present invention, under the action of the slurry pressure, part of the slurry enters the magnetic medium, and the other part of the slurry enters the grid-like flow channel at the bottom of the upper magnetic pole and flows mutually between the material channels, so that the slurry can flow into the magnetic medium from other positions, which can improve the filling speed and uniformity of the slurry in the magnetic medium between the material channels of the upper magnetic pole; after the slurry is diverted by the guide cover in the material distribution chamber, sprayed by several injection pipes, sprayed by the spray cover through the spray holes, and compensated by the grid-like flow channel for material slurry distribution, compared with the traditional multi-tube multi-point feeding and one-time material slurry distribution method, the uniformity of the slurry distribution is further improved.

[0031] 3. When the slurry is fed into the present invention, the slurry passes through the magnetic medium evenly from top to bottom, and the magnetic medium can evenly adsorb ferromagnetic substances, thereby avoiding the problem of uneven iron absorption caused by the accumulation of magnetic substances in the magnetic medium or insufficient adsorption due to uneven slurry flow; the upper end face of the lower magnetic pole adopts an inverted cone inclination method, and adopts a grid-like flow channel that is interconnected with the material channel to discharge ore. When unloading iron, flushing water passes through the magnetic medium to flush the ore, thereby reducing the blind channel material storage phenomenon caused by the porous magnetic medium being pressed and compacted with the plane. The magnetic substances can be collected and output through the inverted cone aggregate area at the upper end face of the lower magnetic pole. At the same time, the grid-like flow channels arranged on the surface of the inverted cone aggregate area are interconnected for discharge, thereby improving the unloading speed and emptying time of the magnetic medium, and there will be no blind area for unloading iron. The ore is unloaded cleanly with less residue, which effectively improves the iron removal and purification effect and the sorting index, and solves the problems of long unloading time, easy residue of magnetic substances, low working efficiency, ore running or difficult unloading affecting the iron removal index in the existing equipment.

[0032] 4. The present invention effectively reduces the manufacturing difficulty of large-scale slurry high-gradient magnetic separators, improves the single-stage feeding method that relies entirely on multi-point feeding of feed pipes, saves more than 70% of the number of feed pipes, greatly reduces welding deformation, improves product manufacturing strength and processability, and significantly reduces manufacturing costs.

[0033] 5. Since the magnetic medium needs to be disassembled and cleaned regularly during use, the present invention adopts multiple sub-sorting chambers for simultaneous sorting. The first and second partitions can force the flow direction of the ore pulp and the flushing water to be drained, so that the flushing and unloading of iron is cleaner, and the disassembly and cleaning cycle of the magnetic medium is extended. At the same time, the width requirement of the material for making the magnetic medium is reduced, which solves the problem of high customization cost of ultra-wide materials and can reduce the cost by 20%. In addition, the weight and deformation of the magnetic medium monomer are reduced during frequent disassembly and assembly. It is easy to operate and ensure quality, which reduces the labor intensity of the operator and improves the convenience of operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator of the present invention;

[0035] Figure 2 for Figure 1 The structural diagram of the middle A direction;

[0036] Figure 3 for Figure 1 Schematic diagram of the structure in the middle BB direction;

[0037] Figure 4 for Figure 1 Schematic diagram of the structure in the CC direction;

[0038] Figure 5 for Figure 1 Schematic diagram of the structure in the middle DD direction;

[0039] Figure 6 for Figure 1 Enlarged view of the middle E area;

[0040] Figure 7 for Figure 1 Magnified view of region F.

[0041] In the figure: 1-frame, 2-excitation coil, 21-magnetic conductor, 3-sorting cylinder, 31-upper magnetic pole, 32-lower magnetic pole, 33-first partition, 34-sub-sorting chamber, 35-magnetic medium, 36-material channel, 37-grid flow trough, 41-second partition, 42-sub-mixing chamber, 5-spray cover, 51-spray hole, 6-material distribution chamber, 61-feeding port, 62-guide cover, 63-injection pipe, 71-discharging port, 72-third partition, 73-sub-discharging chamber, 74-lower flow channel, 75-guide plate. DETAILED DESCRIPTION

[0042] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0043] Please refer to Figure 1-Figure 7, is an embodiment of a multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator provided by the present invention, comprising a frame 1, on which an excitation coil 2 is arranged; a separation barrel 3 is vertically arranged and passes through the excitation coil 2; an upper magnetic pole 31 and a lower magnetic pole 32 are arranged in the separation barrel 3, a separation cavity is formed between the upper magnetic pole 31 and the lower magnetic pole 32, a first partition 33 is arranged in the separation cavity, the first partition 33 divides the separation cavity into a plurality of sub-separation cavities 34, each of the sub-separation cavities 34 is provided with There is a magnetic medium 35; the upper magnetic pole 31 and the lower magnetic pole 32 are respectively provided with a plurality of through material channels 36 corresponding to each sub-sorting cavity 34. During magnetic separation, the excitation coil 2 is energized to magnetize the magnetic medium 35 in each sub-sorting cavity 34, and the ore pulp flows into the magnetic medium 35 through the material channels 36 on the upper magnetic pole 31, and the magnetic substances in the ore pulp are adsorbed on the magnetic medium 35. After the magnetic substances are adsorbed, the ore pulp flows out through the material channels 36 on the lower magnetic pole 32;

[0044] The material mixing chamber is arranged at the upper end of the sorting barrel 3 and is connected to the sorting barrel 3. A second partition plate 41 is arranged in the material mixing chamber. The second partition plate 41 divides the material mixing chamber into a plurality of circumferentially distributed sub-material mixing chambers 42. The sub-material mixing chambers 42 correspond to the sub-sorting chambers 34 in the vertical direction. A jet hood 5 is arranged in the sub-material mixing chamber 42 to separate it in the vertical direction. The jet hood 5 is provided with a plurality of jet holes 51. A material distribution chamber 6 is arranged above the material mixing chamber. A feed inlet 61 is arranged at the upper end of the material distribution chamber 6. A flow guide hood 62 is arranged in the material distribution chamber 6. A spray pipe 63 corresponding to the sub-material mixing chamber 42 is arranged at the lower end of the material distribution chamber 6. The spray pipe 63 is connected to the sub-material mixing chamber 42. A plurality of spray pipes are distributed around the flow guide hood 62. The spray pipe 6 The inner diameter of 3 gradually increases in the direction away from the material distribution chamber 6, and the axis of the injection pipe 63 is arranged to be inclined downward along the radial direction of the sorting barrel 3. The slurry enters the material distribution chamber 6 through the feed port 61. Under the guidance of the guide cover 62, the slurry is evenly distributed to multiple injection pipes. By utilizing the inclined setting of the injection pipe 63 and the gradually increasing aperture, the slurry can be expanded and diffused outward under the constraint of the inner wall of the injection pipe 63 and sprayed into each sub-mixing chamber 42. The slurry is instantly filled in the sub-mixing chamber 42 and forms a certain pressure. Under the action of the pressure, it is synchronously sprayed downward at each jet hole 51 of the jet cover 5, so that the slurry is evenly sprayed into the sorting barrel 3, effectively improving the uniformity of the slurry distribution.

[0045] For details, please refer to Figure 1 , Figure 2 and Figure 7 The spray hood 5 is in a spherical shape protruding downward, and a plurality of spray holes 51 are evenly distributed on the spray hood 5, which can further reduce the distance between each spray hole 51 and the lower end of the spray pipe 63, expand the spray range, and make the distribution more uniform; in other embodiments, the spray hood 5 can also be set to a flat shape to ensure uniform distribution of the slurry.

[0046] It should be noted that the diameter of the sorting chamber should not be less than 2m to meet the demand for increasing the output of a single machine.

[0047] In this embodiment, please refer to Figure 1 , Figure 3 and Figure 7 , grid-like flow grooves 37 are provided on the end surfaces of the upper magnetic pole 31 and the lower magnetic pole 32 close to the magnetic medium 35, and the grid-like flow grooves 37 connect several material channels 36. When the slurry flows to the lower end surface of the upper magnetic pole 31, under the action of the slurry pressure, part of the slurry enters the magnetic medium 35, and the other part of the slurry enters the grid-like flow grooves 37 at the lower part of the upper magnetic pole 31 and flows mutually between the material channels 36, so that the slurry can flow into the magnetic medium 35 from other positions, which can improve the filling speed and uniformity of the slurry in the magnetic medium 35 between the material channels 36 of the upper magnetic pole 31.

[0048] For further information, please refer to Figure 1 , Figure 3 and Figure 7 The upper end surface of each sub-sorting cavity 34 of the lower magnetic pole 32 is set to an inverted cone to form a collection area, and the grid-like flow channel 37 that is interconnected with the material channel 36 cooperates with each other in the discharge of ore. When unloading iron, the flushing water passes through the magnetic medium 35 to flush the ore, reducing the blind channel storage phenomenon of the medium caused by the porous magnetic medium 35 being pressed tightly against the plane. The magnetic material can be collected and output through the inverted cone-shaped collection area at the upper end surface of the lower magnetic pole 32, and discharged through the grid-like flow channel 37 that is interconnected, thereby improving the unloading speed and emptying time of the magnetic medium 35, and there will be no blind area for unloading iron. The ore is unloaded cleanly with less residue, which effectively improves the iron removal and purification effect and the sorting index, and solves the problems of long unloading time, easy residue of magnetic materials, low work efficiency, ore running or difficult unloading affecting the iron removal index in the existing equipment; in other embodiments, the grid-like flow channel 37 can also be only arranged at the lower end surface of the upper magnetic pole 31 or the upper end surface of the lower magnetic pole 32, so as to ensure that the ore slurry is evenly distributed and the iron unloading is clean and fast.

[0049] In this embodiment, please refer to Figure 1 and Figure 5 The number of sub-sorting cavities 34 is set to 3, and the multiple sub-sorting cavities 34 are distributed along the circumferential direction. The cross-section of the sub-sorting cavity 34 is fan-shaped, which can effectively utilize the sorting cavity space and facilitate the installation of the first partition 33; in other embodiments, the number of sub-sorting cavities 34 can also be set to other values ​​to ensure uniform distribution of the slurry and improve the iron removal and purification effect.

[0050] For further information, please refer to Figure 1 The axes of the sorting barrel 3, the sorting chamber, the material-splitting chamber, the material-distributing chamber 6, the feed port 61 and the flow guide cover 62 should all be in a collinear line to ensure that the slurry can flow smoothly and quickly from top to bottom.

[0051] In this embodiment, please refer to Figure 1 In order to ensure that the slurry is evenly diverted to each injection pipe 63, the guide cover 62 is conical; in other embodiments, the guide cover 62 can also be a polygonal cone or an ellipsoidal surface, so as to be able to evenly divert the slurry to each injection pipe 63.

[0052] For further information, please refer to Figure 1 and Figure 6 The injection pipe 63 is in the shape of a trumpet with a fan-shaped cross section, and the angle of the fan is set to 60°-120°, which can effectively ensure that the slurry is expanded and diffused outward under the constraint of the inner wall surface of the injection pipe, thereby improving the uniformity of the distribution; in other embodiments, the injection pipe 63 can also be in the shape of a truncated cone, so as to enable the slurry to diffuse outward during the process of flowing into the sub-mixing chamber 42.

[0053] In this embodiment, please refer to Figure 1 The present invention should also include a discharge chamber, which is arranged at the lower end of the sorting cylinder 3 and is connected to the sorting cylinder 3. A discharge port 71 is arranged at the lower end of the discharge chamber. During the magnetic separation process, the ore pulp after the magnetic matter is removed is collected in the discharge chamber and discharged from the discharge port 71. When unloading iron, the flushing water carrying the magnetic matter is collected in the discharge chamber and discharged from the discharge port 71.

[0054] For further information, please refer to Figure 1 A third partition plate 72 should be provided in the discharge chamber, and the third partition plate 72 divides the discharge chamber into a plurality of circumferentially distributed sub-discharge chambers 73, and the sub-discharge chambers 73 correspond to the sub-selection chambers 34 one by one in the vertical direction; a downflow channel 74 is provided at the lower end of the sub-discharge chamber 73, and the downflow channel 74 is connected with the discharge port 71, so that the material can flow smoothly from the sub-selection chamber 34 into the sub-discharge chamber 73.

[0055] For further information, please refer to Figure 1 The sub-discharging chamber 73 is preferably provided with an inclined guide plate 75 , and the guide plate 75 can guide the material to be discharged quickly from the discharging port 71 .

[0056] In this embodiment, please refer to Figure 1 The outside of the excitation coil 2 should be wrapped with a magnetic conductor 21, and the excitation coil 2 is fixed to the frame 1 through the magnetic conductor 21. The magnetic conductor 21 can prevent the strong magnetic field generated by the excitation coil 2 from diffusing to the outside, so that the magnetic lines of force are concentrated through the sorting cavity, thereby increasing the background magnetic field strength in the sorting cavity.

[0057] Please refer to Figure 1-Figure 7 , the specific working process of the present invention is as follows:

[0058] The slurry enters the material distribution chamber 6 from the feed port 61, and is quickly distributed to each injection pipe 63 through the guide cover 62. The lower end of the injection pipe 63 forms a fan-shaped injection port, and the material is evenly injected into the material distribution chamber through the fan-shaped injection port to form the first distribution;

[0059] The slurry fills the entire flow area at the spray hood 5 of the material mixing chamber, and is evenly sprayed to the upper magnetic pole 31 through a number of spray holes evenly distributed on the spray hood 5, forming secondary material distribution;

[0060] When the slurry flows into the lower end surface of the upper magnetic pole 31 through the material channel 36 on the upper magnetic pole 31, under the action of the slurry pressure, part of the slurry can enter the interconnected grid-like flow channels 37 and flow and complement each other, so that the slurry flows evenly into the magnetic medium 35, forming a third distribution.

[0061] It should be noted that the above process is the upper feeding method of the present invention. The present invention can also adopt a lower feeding method, and the lower feeding method is to set the upper feeding method in the reverse direction.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-cavity large-scale electromagnetic slurry high gradient magnetic separator, characterized in that: include: A frame (1), wherein an excitation coil (2) is arranged on the frame (1); A vertically arranged sorting barrel (3), the sorting barrel (3) passing through the excitation coil (2); an upper magnetic pole (31) and a lower magnetic pole (32) are arranged in the sorting barrel (3), a sorting cavity is formed between the upper magnetic pole (31) and the lower magnetic pole (32), a first partition (33) is arranged in the sorting cavity, the first partition (33) divides the sorting cavity into a plurality of sub-sorting cavities (34), and a magnetic medium (35) is arranged in each of the sub-sorting cavities (34); the upper magnetic pole (31) and the lower magnetic pole (32) are respectively provided with a plurality of through material channels (36) corresponding to each of the sub-sorting cavities (34); a grid-shaped flow groove (37) is arranged on the end surface of the upper magnetic pole (31) and / or the lower magnetic pole (32) close to the magnetic medium (35), and the grid-shaped flow groove (37) connects the plurality of material channels (36); a material mixing chamber, the material mixing chamber being arranged at the upper end of the sorting barrel (3) and being in communication with the sorting barrel (3); a second partition plate (41) being arranged in the material mixing chamber, the second partition plate (41) dividing the material mixing chamber into a plurality of circumferentially distributed sub-material mixing chambers (42); the sub-material mixing chambers (42) corresponding one to the sub-sorting chambers (34) in the vertical direction; a jet hood (5) being arranged in the sub-material mixing chamber (42) for dividing the sub-material mixing chamber (42) in the vertical direction, the jet hood (5) being provided with a plurality of jet holes (51); A material distribution chamber (6), wherein the material distribution chamber (6) is arranged above the material distribution chamber, a material feed port (61) is arranged at the upper end of the material distribution chamber (6), a flow guide cover (62) is arranged in the material distribution chamber (6), and a spray pipe (63) corresponding to each of the sub-material distribution chambers (42) is arranged at the lower end of the material distribution chamber (6), the spray pipe (63) is communicated with the sub-material distribution chamber (42), a plurality of the spray pipes are distributed around the flow guide cover (62), the inner diameter of the spray pipe (63) gradually increases in a direction away from the material distribution chamber (6), the axis of the spray pipe (63) is arranged to be inclined downward along the radial direction of the sorting barrel (3), and the total flow rate of the plurality of spray holes (51) is less than the flow rate of the spray pipe (63).

2. A multi-cavity large-scale electromagnetic slurry high gradient magnetic separator according to claim 1, characterized in that: The upper end surface of the lower magnetic pole (32) corresponding to each of the sub-selection cavities (34) is configured in an inverted cone shape.

3. The multi-cavity large-scale electromagnetic slurry high gradient magnetic separator according to claim 1 is characterized in that: The spray cover (5) is in the shape of a spherical surface convex downwards; And / or, the plurality of spray holes (51) are evenly distributed on the spray cover (5).

4. The multi-cavity large-scale electromagnetic slurry high gradient magnetic separator according to claim 1 is characterized in that: The deflector cover (62) is conical in shape.

5. The multi-cavity large-scale electromagnetic slurry high gradient magnetic separator according to claim 1 is characterized in that: The number of the sub-sorting chambers (34) is set to 2-6; And / or, the plurality of sub-sorting cavities (34) are distributed along the circumferential direction, and the cross-section of the sub-sorting cavity (34) is fan-shaped; And / or, the injection pipe (63) is trumpet-shaped, the cross section of the injection pipe (63) is fan-shaped, and the angle of the fan-shaped is set to 60°-120°.

6. The multi-cavity large-scale electromagnetic slurry high-gradient magnetic separator according to claim 1 is characterized in that: The axes of the sorting barrel (3), the sorting chamber, the material mixing chamber, the material distribution chamber (6), the feed port (61) and the flow guide cover (62) are all collinear; and / or, the diameter of the sorting chamber is not less than 2 m; And / or, the outside of the excitation coil (2) is wrapped with a magnetic conductor (21), and the magnetic conductor (21) is fixed on the frame (1).

7. The multi-cavity large-scale electromagnetic slurry high gradient magnetic separator according to claim 1 is characterized in that: It also comprises a discharge cavity, which is arranged at the lower end of the separation cylinder (3) and is in communication with the separation cylinder (3), and a discharge port (71) is arranged at the lower end of the discharge cavity.

8. A multi-cavity large-scale electromagnetic slurry high gradient magnetic separator according to claim 7, characterized in that: A third partition (72) is provided in the discharge chamber, and the third partition (72) divides the discharge chamber into a plurality of circumferentially distributed sub-discharge chambers (73), and the sub-discharge chambers (73) correspond to the sub-selection chambers (34) in a one-to-one vertical direction; a lower flow channel (74) is provided at the lower end of the sub-discharge chamber (73), and the lower flow channel (74) is connected to the discharge port (71).

9. A multi-cavity large-scale electromagnetic slurry high gradient magnetic separator according to claim 8, characterized in that: An inclined guide plate (75) is provided in the sub-discharging chamber (73).

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