Mineral separation and magnetic separation machine for muddy tungsten polymetallic ore and recovery system for recovering black tungsten

Abstract

The invention discloses a mineral separation magnetic separator for muddy tungsten polymetallic ore and a recovery system for recovering black tungsten, and relates to the technical field of mineral separation of the muddy tungsten polymetallic ore. The blending box is used for blending raw material ore pulp with the concentration of 30%; the bottom of the blending box is transmitted to the permanent magnet separator through a transmission pump connecting pipeline, and a return pipeline I and a circulating pump I are mounted on the permanent magnet separator; magnetically separating the raw ore pulp by a permanent magnetic separator to obtain weak magnetic concentrate pulp; the bottom of the permanent magnetic separator is provided with a transmission pipeline and connected with the high-intensity magnetic separator, and the transmission pipeline is connected with a transmission pump; the concentrate thickener is used for blending and concentrating to obtain concentrated ore pulp with the concentration of 25-35%; a centrifugal concentrator; a return pipeline II and a circulating pump II are arranged on the centrifugal separator, and the number of cycles is three; and the frequencies of the centrifugal separator are respectively 50HZ, 40HZ and 30HZ. The technical problems that argillization tungsten ore cannot be recycled, and materials with proper tungsten concentration cannot be selected through magnetic separation and gravity separation, and the recycling difficulty is large are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ore dressing of muddy tungsten polymetallic ore, in particular to a magnetic separator for dressing muddy tungsten polymetallic ore and a recovery system for recovering black tungsten. Background Art

[0002] Muddy tungsten polymetallic ore, muddy means that the mineral particle size is less than 0.15mm, and the content of particles less than 0.02mm is greater than 40%. Polymetallic ore refers to useful metals in the mineral, including but not limited to tungsten, molybdenum, bismuth, iron, and tin, from which black tungsten is recovered by beneficiation to produce tungsten (measured in WO3) greater than 15%. Most of the existing technologies are aimed at recovering black tungsten from primary ore, and there is a lack of technology in the beneficiation of muddy tungsten polymetallic ore as raw material. Secondly, although the current strong magnetic separator can adjust the magnetic field strength, it mostly uses high-pressure water guns for cleaning or shutdown and disassembly for cleaning when cleaning magnetically attracted materials, which takes a lot of time. To this end, we provide a magnetic separator for beneficiation of muddy tungsten polymetallic ore and a recovery system for recovering black tungsten to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to make up for the shortcomings of the prior art and provide a magnetic separator for the beneficiation of muddy tungsten polymetallic ore and a recovery system for recovering black tungsten, so as to overcome the technical problems that muddy tungsten ore cannot be recovered and that magnetic separation and gravity separation cannot select materials with suitable tungsten concentrations, which makes the recovery difficult.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The recovery system of black tungsten from muddy tungsten polymetallic ore includes:

[0006] A mixing box is used to mix raw material slurry, and the concentration of the raw material slurry is 30%. A transmission pump is connected to the mixing box;

[0007] Permanent magnetic separator, the bottom of the mixing box is connected to the permanent magnetic separator through a transmission pump connecting pipeline, and a return pipeline 1 and a circulation pump 1 are arranged at the bottom of the permanent magnetic separator, the return pipeline 1 is suitable for repeatedly pumping the slurry of the permanent magnetic separator back to the inlet of the permanent magnetic separator; the circulation pump 1 is installed on the return pipeline 1; the raw slurry is magnetically separated by the permanent magnetic separator to obtain weak magnetic concentrate slurry;

[0008] Strong magnetic separator: A transmission pipeline is arranged at the bottom of the permanent magnetic separator and connected to the strong magnetic separator, and a transmission pump is connected to the transmission pipeline; the weak magnetic concentrate enters the strong magnetic separator to be screened into coarse black tungsten concentrate;

[0009] Concentrate thickener: The concentrate thickener mixes and concentrates the coarse wolframite concentrate to a concentrated pulp with a concentration of 25-35%;

[0010] Centrifugal concentrator, a transmission pipeline is installed between the centrifugal concentrator and the concentrate thickener and is connected to a transmission pump; a return pipeline 2 and a circulation pump 2 are provided on the centrifugal concentrator, and the number of cycles is 3 times; and the frequencies of the centrifugal concentrator are 50HZ, 40HZ and 30HZ respectively.

[0011] In a further technical solution, the high intensity magnetic separator is 1.0T to 1.3T.

[0012] The magnetic separator for beneficiation of tungsten polymetallic ore comprises a frame, a magnetic drum is arranged in the frame, and a feed box is installed on one side of the magnetic drum; a guide plate is installed in the feed box;

[0013] A sector plate is installed in the magnetic drum, and a magnetic system is installed on the sector plate;

[0014] A central shaft is arranged in the middle of the sector plate, and the central shaft is connected to the sector plate;

[0015] A load plate is installed on the central axis, the load plate is arc-shaped and is provided with a connecting rod connected to the central axis;

[0016] The magnetic drum is provided with an inner ring shell and an outer ring shell, and a baffle is installed on the side of the load plate facing away from the fan-shaped plate; and a limit member is installed on the connecting rod; the baffle is suitable for opening and closing the feed box;

[0017] A magnetic shielding plate is installed between the outer ring shell and the inner ring shell.

[0018] In a further technical solution, an arc-shaped opening is provided on the fan-shaped plate, and the arc-shaped opening is suitable for installing multiple sets of magnetic systems; closed plates are provided at both ends of the arc-shaped opening, and the closed plates are suitable for abutting against the end faces of the magnetic systems and are detachably connected to the fan-shaped plate.

[0019] In a further technical solution, an extension plate is installed on the side of the load plate facing away from the connecting plate, and the extension plate extends out of the inner ring shell and the outer ring shell and is integrally connected with an arc-shaped baffle;

[0020] The arc-shaped baffle, the inner ring shell and the outer ring shell are arranged in a cocircular manner;

[0021] The feed box is provided with a side opening, and a baffle plate is installed in the side opening, and the top of the baffle plate is rotatably connected to the inner wall of the feed box; the arc-shaped baffle plate is suitable for movably inserting into the side opening to shield the feed box.

[0022] In a further technical solution, the position-limiting member comprises a fixed block, and the fixed block is provided in two groups and is fixedly connected to the inner wall of the inner ring shell; a position-limiting rod is installed between the two groups of the fixed blocks;

[0023] The connecting rod is provided with a mounting groove, the inner diameter of which is larger than the rod diameter of the limiting rod; and the limiting rod is arranged through the mounting groove;

[0024] The two sets of fixed blocks are installed horizontally, and a fixed plate is installed on the fixed block close to the feed box, a travel switch is installed on the fixed plate, and the connecting rod is suitable for abutting the travel switch at the extreme position on the limit rod; the extreme position is the position where the connecting rod rotates to abut the fixed block.

[0025] In a further technical solution, the tops of the inner ring shell and the outer ring shell are both provided with open grooves, and the open grooves are suitable for the extension plate to pass through;

[0026] Support plates are arranged at both ends of the inner ring shell, and the support plates are fixedly connected to the frame.

[0027] In a further technical solution, a driving motor is installed at the outer end of the central shaft, and the driving motor is suitable for driving the central shaft to rotate; the driving motor is a stepping motor.

[0028] In a further technical solution, a water spray port is installed at the bottom of the frame, and a high-pressure water spray head arranged obliquely upward is installed in the water spray port and is suitable for connecting to an external water pipe; and a discharge port is installed at the bottom of the magnetic drum;

[0029] A steering motor is installed at one end of the magnetic rotating cylinder facing away from the driving motor, and a fixing cylinder is installed at the output part of the steering motor, and the fixing cylinder is connected to the outer ring shell; after the travel switch is triggered, it is suitable for triggering the opening and closing of the high-pressure water spray head and the steering motor.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention adopts a combined beneficiation process of "magnetic-magnetic-gravity" for muddy tungsten polymetallic ores. Through the strong magnetic method in the strong magnetic separator, the magnetic field strength is controlled at 1.0 Tesla to 1.3 Tesla, and the gravity separation adopts three consecutive centrifugal beneficiation operations to continuously magnetically select suitable black tungsten concentrate.

[0032] The present invention adjusts the position of the fan-shaped plate on the central axis in the magnetic separation cylinder by driving the motor, thereby affecting the position of the magnetic flux in the discharge port. The connecting rod is rotated on the limit rod to the limit position. On the one hand, the arc-shaped baffle plate on the top is plugged into the feed box to achieve the material blocking effect. On the other hand, the travel switch is triggered to further realize the operation of the high-pressure water spray head and drive the steering motor to turn on to realize the rotation of the magnetic shielding plate. Since it is set between the inner ring shell and the outer ring shell, it moves to the bottom of the fan-shaped plate and interferes with the adsorbed magnetic separation material at its bottom position, so that the magnetic separation material falls at the discharge port, and the solid magnetic separation material is discharged through different directions of the pipeline. No additional shutdown for cleaning is required, and quick cleaning can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of a recycling system of the present invention;

[0034] Figure 2 It is a front view structural schematic diagram of the high-intensity magnetic separator of the present invention;

[0035] Figure 3 It is a front cross-sectional schematic diagram of the high-intensity magnetic separator of the present invention;

[0036] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0037] Figure 5 for Figure 3 A magnified schematic diagram of part B;

[0038] Figure 6 for Figure 3 An enlarged schematic diagram of the C portion;

[0039] Figure 7 It is a schematic diagram of the back structure of the high-intensity magnetic separator of the present invention.

[0040] In the figure:

[0041] 1. Dispensing box; 2. Transmission pump; 3. Permanent magnetic separator; 31. Return pipe 1; 32. Circulation pump 1; 4. High-intensity magnetic separator; 5. Transmission pipeline; 6. Concentrate thickener; 7. Centrifugal separator; 71. Return pipe 2; 72. Circulation pump 2;

[0042] 41. Frame; 42. Magnetic drum; 43. Feed box; 44. Guide plate; 45. Fan plate; 46. Magnetic system; 47. Center axis; 48. Load plate; 49. Inner ring shell; 410. Outer ring shell; 411. Connecting rod; 412. Magnetic shielding plate; 413. Closed plate; 414. Extension plate; 415. Arc baffle; 416. Baffle plate; 417. Fixed block; 418. Limit rod; 419. Mounting slot; 420. Travel switch; 421. Open slot; 422. Support plate; 423. Drive motor; 424. High-pressure sprinkler head; 425. Discharge port; 426. Steering motor. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] See also Figure 1 , the present invention provides a technical solution, a recovery system for recovering black tungsten from mud tungsten polymetallic ore, comprising a mixing box 1, the mixing box 1 mixes the raw material slurry concentration, the raw material slurry concentration is 30%; the mixing box 1 is externally connected to a transmission pump 2;

[0046] Permanent magnetic separator 3, the bottom of the mixing box 1 is connected to the permanent magnetic separator 3 through the transmission pump 2, and a return pipe 31 and a circulation pump 32 are arranged at the bottom of the permanent magnetic separator 3, the return pipe 31 is suitable for repeatedly pumping the slurry of the permanent magnetic separator 3 back to the inlet of the permanent magnetic separator 3; the circulation pump 32 is installed on the return pipe 31; the raw material slurry is magnetically separated by the permanent magnetic separator 3 to obtain weak magnetic concentrate slurry;

[0047] Strong magnetic separator 4, a transmission pipeline 5 is arranged at the bottom of the permanent magnetic separator 3 and connected to the strong magnetic separator 4, and a transmission pump 2 is connected to the transmission pipeline 5; the weak magnetic concentrate enters the strong magnetic separator 4 to be screened into black tungsten coarse concentrate;

[0048] The concentrate thickener 6 is used to mix and concentrate the coarse wolframite concentrate to a concentrated pulp with a concentration of 25-35%;

[0049] A centrifugal concentrator 7 is provided with a transmission pipeline 5 between the centrifugal concentrator 7 and the concentrate thickener 6 and is connected with a transmission pump 2; a return pipeline 2 71 and a circulation pump 2 72 are provided on the centrifugal concentrator 7, and the number of cycles is 3 times; and the frequencies of the centrifugal concentrator 7 are 50HZ, 40HZ and 30HZ respectively.

[0050] In a further technical solution, the high-intensity magnetic separator 4 is 1.0T to 1.3T. This embodiment is aimed at the recovery of black tungsten from muddy tungsten polymetallic ores, and produces tungsten containing more than 15%. The present invention can solve the problem that muddy tungsten ore cannot be recovered, and adopts a combined beneficiation scheme of magnetic separation and gravity separation. There is no residual beneficiation agent in the beneficiation wastewater, and there is no environmental burden. The present invention adopts a combined beneficiation process of "magnetic-magnetic-gravity" for muddy tungsten polymetallic ores. Through the strong magnetic method in the high-intensity magnetic separator, the magnetic field strength is controlled at 1.0 Tesla to 1.3 Tesla, and the gravity separation adopts three continuous centrifugal beneficiation operations.

[0051] Example 2

[0052] like Figure 2-7 As shown in FIG. 1 , another embodiment of the present invention is provided. On the basis of Example 1, a magnetic separator for beneficiating tungsten polymetallic ore comprises a frame 41, a magnetic drum 42 is arranged in the frame 41, and a feed box 43 is installed on one side of the magnetic drum 42; Figure 3As shown, a guide plate 44 is installed in the feed box 43; a fan-shaped plate 45 is installed in the magnetic drum 42, and a magnetic system 46 is installed on the fan-shaped plate 45; a central shaft 47 is provided in the middle of the fan-shaped plate 45, and the central shaft 47 is connected to the fan-shaped plate 45;

[0053] A load plate 48 is mounted on the central shaft 47. The load plate 48 is arc-shaped and is provided with a connecting rod 411 connected to the central shaft 47.

[0054] like Figure 3 As shown, the magnetic drum 42 is provided with an inner ring shell 49 and an outer ring shell 410, and a baffle is installed on the side of the load plate 48 facing away from the fan-shaped plate 45; and a limiter is installed on the connecting rod 411; the baffle is suitable for opening and closing the feed box 43; a magnetic shielding plate 412 is installed between the outer ring shell 410 and the inner ring shell 49. The present invention adopts two sets of rotating ring shells to realize convenient cleaning of the required materials adsorbed on the magnetic separation drum. The present invention realizes the adjustment of magnetic flux by installing multiple sets of magnetic systems on the fan-shaped plate, so as to realize the magnetic attraction at different rack positions and achieve the magnetic separation effect.

[0055] The fan-shaped plate 45 is provided with an arc-shaped opening, and the arc-shaped opening is suitable for installing multiple sets of magnetic systems 46; closed plates 413 are provided at both ends of the arc-shaped opening, and the closed plates 413 are suitable for abutting against the end surface of the magnetic system 46 and are detachably connected to the fan-shaped plate 45.

[0056] like Figure 5 As shown, an extension plate 414 is installed on the side of the load plate 48 facing away from the connecting plate. The extension plate 414 extends out of the inner ring shell 49 and the outer ring shell 410 and is integrally connected with an arc-shaped baffle 415;

[0057] The arc-shaped baffle 415, the inner ring shell 49 and the outer ring shell 410 are arranged cocircularly;

[0058] The feed box 43 is provided with a side opening, and a baffle plate 416 is installed in the side opening, and the top of the baffle plate 416 is rotatably connected to the inner wall of the feed box 43; the arc baffle 415 is suitable for being movably inserted into the side opening to shield the feed box 43. The designed arc baffle can set its length according to the size of the feed box actually installed. The limiting member includes a fixed block 417, and the fixed block 417 is provided in two groups and is fixedly connected to the inner wall of the inner ring shell 49; a limiting rod 418 is installed between the two groups of the fixed blocks 417; a mounting groove 419 is provided on the connecting rod 411, and the inner diameter of the mounting groove 419 is larger than the rod diameter of the limiting rod 418; and the limiting rod 418 is set through the mounting groove 419;

[0059] Combination Figure 3 and Figure 5As shown, two groups of fixed blocks 417 are installed horizontally, and a fixed plate is installed on the fixed block 417 close to the feed box 43, and a travel switch 420 is installed on the fixed plate. The connecting rod 411 is suitable for abutting the travel switch 420 at the extreme position on the limit rod 418; the extreme position is the position where the connecting rod 411 rotates to abut the fixed block 417.

[0060] The tops of the inner ring shell 49 and the outer ring shell 410 are both provided with an opening groove 421, and the opening groove 421 is suitable for the extension plate 414 to pass through; support plates 422 are provided at both ends of the inner ring shell 49, and the support plates 422 are fixedly connected to the frame 41.

[0061] like Figure 2 As shown, a driving motor 423 is installed at the outer end of the central shaft 47, and the driving motor 423 is suitable for driving the central shaft 47 to rotate; the driving motor 423 is a stepping motor. The connection between the driving motor and the central shaft is not shown in the figure. According to the actual installation design, a coupling or other connecting components can be added to realize the connection between the driving motor and the central shaft.

[0062] A water spray port is installed at the bottom of the frame 41, and a high-pressure water spray head 424 arranged obliquely upward is installed in the water spray port, and is suitable for being connected to an external water pipe (not shown in the figure); and a discharge port 425 is installed at the bottom of the magnetic rotating cylinder 42; a steering motor 426 is installed at the end of the magnetic rotating cylinder 42 facing away from the drive motor 423, and a fixed cylinder is installed at the output part of the steering motor 426, and the fixed cylinder is connected to the outer ring shell 410; after the travel switch 420 is triggered, it is suitable for triggering the opening and closing of the high-pressure water spray head 424 and the opening and closing of the steering motor 426.

[0063] The present invention adjusts the position of the fan-shaped plate on the central axis in the magnetic separation cylinder by driving the motor, thereby affecting the position of the magnetic flux in the discharge port. The connecting rod is rotated on the limit rod to the limit position. On the one hand, the arc-shaped baffle plate on the top is plugged into the feed box to achieve the material blocking effect. On the other hand, the travel switch is triggered to further realize the operation of the high-pressure water spray head and drive the steering motor to turn on to realize the rotation of the magnetic shielding plate. Since it is set between the inner ring shell and the outer ring shell, it moves to the bottom of the fan-shaped plate and interferes with the adsorbed magnetic separation material at its bottom position, so that the magnetic separation material falls at the discharge port, and the solid magnetic separation material is discharged through different directions of the pipeline. No additional shutdown for cleaning is required, and quick cleaning can be achieved.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0065] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A system for recovering black tungsten from muddy tungsten polymetallic ore, characterized in that: include: A mixing box (1), the mixing box (1) mixes raw material slurry, the raw material slurry concentration is 30%; the mixing box (1) is externally connected to a transmission pump (2); A permanent magnetic separator (3), the bottom of the mixing box (1) is connected to the permanent magnetic separator (3) through a pipeline via a transmission pump (2), and a return pipeline (31) and a circulation pump (32) are installed on the permanent magnetic separator (3), the return pipeline (31) is suitable for repeatedly pumping the raw material slurry magnetically separated by the permanent magnetic separator (3) back to the inlet of the permanent magnetic separator (3); the circulation pump (32) is installed on the return pipeline (31); the raw material slurry is magnetically separated by the permanent magnetic separator (3) to obtain weak magnetic concentrate slurry; A strong magnetic separator (4), a transmission pipeline (5) is arranged at the bottom of the permanent magnetic separator (3) and connected to the strong magnetic separator (4), and a transmission pump (2) is connected to the transmission pipeline (5); the weak magnetic concentrate enters the strong magnetic separator (4) and is screened into black tungsten coarse concentrate; A concentrate thickener (6), which mixes and concentrates the coarse wolframite concentrate to a concentrated pulp with a concentration of 25-35%; A centrifugal concentrator (7) is provided, wherein a transmission pipeline (5) is installed between the centrifugal concentrator (7) and a concentrate thickener (6) and is connected to a transmission pump (2); a return pipeline (71) and a circulation pump (72) are arranged on the centrifugal concentrator (7), and the number of circulations is 3 times; and the frequencies of the centrifugal concentrator (7) are 50 Hz, 40 Hz and 30 Hz respectively.

2. The recovery system for recovering black tungsten from muddy tungsten polymetallic ore according to claim 1 is characterized in that: The high-intensity magnetic separator (4) is 1.0T to 1.3T.

3. A magnetic separator for ore dressing of tungsten polymetallic ore, used in the high-intensity magnetic separator (4) in claim 1; characterized in that: It comprises a frame (41), a magnetic drum (42) is arranged in the frame (41), and a feed box (43) is installed on one side of the magnetic drum (42); a guide plate (44) is installed in the feed box (43); A sector plate (45) is installed in the magnetic rotating drum (42), and a magnetic system (46) is installed on the sector plate (45); A central shaft (47) is provided in the middle of the sector plate (45), and the central shaft (47) is connected to the sector plate (45); A load plate (48) is installed on the central shaft (47); the load plate (48) is arc-shaped and is provided with a connecting rod (411) connected to the central shaft (47); The magnetic drum (42) is provided with an inner ring shell (49) and an outer ring shell (410); a baffle is installed on the side of the load plate (48) facing away from the fan-shaped plate (45); and a limit member is installed on the connecting rod (411); the baffle is suitable for opening and closing the feed box (43); A magnetic shielding plate (412) is installed between the outer ring shell (410) and the inner ring shell (49).

4. The magnetic separator for beneficiation of tungsten polymetallic ore according to claim 3, characterized in that: The fan-shaped plate (45) is provided with an arc-shaped opening, and the arc-shaped opening is suitable for installing multiple groups of magnetic systems (46); closed plates (413) are provided at both ends of the arc-shaped opening, and the closed plates (413) are suitable for abutting against the end surface of the magnetic system (46) and being detachably connected to the fan-shaped plate (45).

5. The magnetic separator for beneficiation of tungsten polymetallic ore according to claim 4, characterized in that: An extension plate (414) is installed on the side of the load plate (48) facing away from the connection plate, and the extension plate (414) extends out of the inner ring shell (49) and the outer ring shell (410) and is integrally connected with an arc-shaped baffle plate (415); The arc-shaped baffle plate (415), the inner ring shell (49) and the outer ring shell (410) are arranged in a cocircular manner; The feed box (43) is provided with a side opening, and a baffle plate (416) is installed in the side opening, and the top of the baffle plate (416) is rotatably connected to the inner wall of the feed box (43); the arc-shaped baffle plate (415) is suitable for being movably inserted into the side opening to shield the feed box (43).

6. The magnetic separator for ore dressing of tungsten polymetallic ore according to claim 5, characterized in that: The limiting member comprises a fixing block (417), wherein two groups of the fixing blocks (417) are provided and fixedly connected to the inner wall of the inner ring shell (49); a limiting rod (418) is installed between the two groups of the fixing blocks (417); The connecting rod (411) is provided with a mounting groove (419), the inner diameter of the mounting groove (419) is larger than the rod diameter of the limiting rod (418); and the limiting rod (418) is arranged through the mounting groove (419); The two groups of fixed blocks (417) are installed horizontally, and a fixed plate is installed on the fixed block (417) close to the feed box (43), and a travel switch (420) is installed on the fixed plate. The connecting rod (411) is suitable for abutting against the travel switch (420) at the extreme position on the limit rod (418); the extreme position is the position where the connecting rod (411) rotates to abut against the fixed block (417).

7. The magnetic separator for beneficiation of tungsten polymetallic ore according to claim 5, characterized in that: The tops of the inner ring shell (49) and the outer ring shell (410) are both provided with an opening groove (421), and the opening groove (421) is suitable for the extension plate (414) to pass through; Support plates (422) are provided at both ends of the inner ring shell (49), and the support plates (422) are fixedly connected to the frame (41).

8. The magnetic separator for beneficiation of tungsten polymetallic ore according to claim 5, characterized in that: A driving motor (423) is installed at the outer end of the central shaft (47), and the driving motor (423) is suitable for driving the central shaft (47) to rotate; the driving motor (423) is a stepping motor.

9. The magnetic separator for beneficiation of tungsten polymetallic ore according to claim 6, characterized in that: A water spray port is installed at the bottom of the frame (41), and a high-pressure water spray head (424) is installed in the water spray port and is arranged obliquely upward and is suitable for connecting to an external water pipe; and a discharge port (425) is installed at the bottom of the magnetic drum (42); A steering motor (426) is installed at one end of the magnetic rotating cylinder (42) facing away from the driving motor (423), and a fixing cylinder is installed at the output portion of the steering motor (426), and the fixing cylinder is connected to the outer ring shell (410); After the travel switch (420) is triggered, it is suitable for triggering the opening and closing of the high-pressure water spray head (424) and the opening and closing of the steering motor (426).

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