CN117563770A - Device for recycling rare earth oxide by utilizing rare earth magnetic material waste - Google Patents

Abstract

The invention provides a device for recycling rare earth oxide by utilizing rare earth magnetic material waste, which comprises an extraction box, wherein a bracket is fixedly arranged at the top of the extraction box, a sedimentation box is arranged at one side of the extraction box, a magnetic suction box is rotatably connected to the bracket, a discharging pipe is arranged at the bottom of the magnetic suction box, a top plate is fixedly arranged at the top of the bracket, a hopper positioned above the magnetic suction box is fixedly connected to the top plate, a discharging pipe is arranged at the bottom of the hopper, a discharging opening in butt joint with the discharging pipe is arranged at the top of the magnetic suction box, a rotating shaft is rotatably connected to the top of the hopper, and the lower end of the rotating shaft penetrates through the discharging pipe, the discharging opening, the magnetic suction box and the discharging pipe. The device can accomplish magnetic separation, leaching and sedimentation process by the serialization, and the integration sets up, compact structure, and area is little, adopts rotatory magnetic separation's mode, and the magnetic separation is thorough to can carry out the process of magnetic separation, lixivium mixture and precipitate discharge in step.

Description

A device for recycling rare earth oxides from rare earth magnetic material waste

Technical field

The present invention relates to the technical field of rare earth waste recycling, and in particular to a device for recovering rare earth oxides from rare earth magnetic material waste.

Background technique

NdFeB permanent magnet materials have been widely used in defense industry, aerospace, medical equipment, computers, electronics and new energy automobile industries due to their superior magnetic properties. Today, more than 300,000 tons of NdFeB permanent magnets are produced globally every year. Waste materials such as magnet chips, cutting chips, grinding chips, and ultrafine powder will be generated during the manufacturing process, accounting for 20 to 30% of the input materials. And as time goes by, the permanent magnets that are components of each product will gradually expire and be scrapped. How to low-cost and green recycle the various elements contained in it, especially rare earth elements, has become an important technical issue at the moment.

At present, the process of recovering rare earth oxides from rare earth magnetic waste generally goes through magnetic separation, leaching, precipitation and calcination. However, most of the existing recovery equipment is a single equipment, which requires transfer or erection of conveying equipment between equipment, which occupies an area of Large, and the magnetic separation equipment has incomplete magnetic suction.

Contents of the invention

In view of the above problems, the present invention provides a device for recovering rare earth oxides from rare earth magnetic material waste. The device can continuously complete the magnetic separation, leaching and precipitation processes. It is integrated, compact in structure, small in floor space, and adopts a rotating method. The magnetic separation method is thorough and can simultaneously carry out the processes of magnetic separation, leachate mixing and sediment discharge.

In order to solve the above problems, the technical solution adopted by the present invention is:

A device for recovering rare earth oxides from rare earth magnetic material waste, including a leaching box. A bracket is fixedly installed on the top of the leaching box. A sedimentation box is installed on one side of the leaching box. A magnetic suction box is rotatably connected to the bracket. The bottom of the magnetic box is provided with a discharge pipe, and the top of the bracket is fixed with a top plate. The top plate is fixedly connected with a hopper located above the magnetic box. The bottom of the hopper is provided with a discharge pipe. The top of the magnetic suction box is provided with a discharge port connected to the discharge pipe. The top of the hopper is rotatably connected to a rotating shaft. The lower end of the rotating shaft runs through the discharge pipe, the discharge port, the magnetic suction box and the discharge pipe. The rotating shaft There are multiple connecting arms fixedly connected to the inner wall of the unloading port. Two opening and closing mechanisms are installed on the rotating shaft. The two opening and closing mechanisms correspond to the unloading pipe and the discharging pipe respectively. The circumferential inner wall of the magnetic suction box There are multiple vertical magnetic strips embedded in it. The bottom of the magnetic box is equipped with multiple drop-out openings corresponding to the magnetic strips. The magnetic box is equipped with a magnetic strip that can put multiple magnetic strips on the magnetic strips. The sucked waste is pushed to the annular push plate of the blanking port. A plurality of staggered guide plates are fixed on the circumferential side wall of the rotating shaft in the magnetic separation box. The top of the leaching box is provided with a material corresponding to the blanking port. An annular blanking channel, a stirring assembly connected to the rotating shaft is installed in the leaching tank, and a pump liquid pipe is provided in the settling tank to pump the leaching liquid in the leaching tank into the settling tank.

Preferably, the tops of both sides of the annular push plate are fixedly connected with support rods extending out of the magnetic suction box. The first spring is set on the support rod, and the upper end of the support rod is fixedly connected with an annular support plate. A cylinder is installed on the top plate for pushing the annular supporting plate downward.

Preferably, a motor is fixedly installed on the top of the hopper, and the output end of the motor is connected to the upper end of the rotating shaft through a pair of gear transmission.

Preferably, the opening and closing mechanism includes a circular cavity arranged in the rotating shaft, a connecting rod is elastically connected to the circular cavity through a second spring, and there are holes on both sides of the circular cavity for the corresponding ends of the connecting rod to pass through. The outer wall of the rotating shaft is equipped with a tapered stopper fixedly connected to the connecting rod. The tapered stopper is adapted to the nozzles of the feeding pipe and the discharge pipe. The tapered stopper is The bottom of the seat is fixed with a sealing sleeve set on the rotating shaft.

Preferably, two conductive rings are fixed on the upper end side wall of the rotating shaft. The two conductive rings are electrically connected to the two second springs respectively. The conductive rings are externally connected to brushes, and the brushes are externally connected to the control switch.

Preferably, the bottom of the magnetic suction box is provided with a telescopic groove connected with the corresponding discharge opening, and an arc-shaped baffle extending into the discharge opening is elastically connected in the telescopic groove through a third spring.

Preferably, the bracket is fixedly mounted with an annular conductive rail sleeved around the periphery of the magnetic suction box, and a plurality of conductive sliders that conflict with the annular conductive rail are fixed on the circumferential side walls of the magnetic suction box. The block is electrically connected to the corresponding third spring, and the annular conductive rail is connected to an external control switch.

Preferably, the stirring assembly includes a stirring shaft rotatably connected in the leaching box. A plurality of liquid mixing plates are fixed on the stirring shaft. The upper end of the stirring shaft extends out of the leaching box and is connected to the lower end of the rotating shaft through a clutch.

Preferably, the bottom of the sedimentation tank is provided with a discharge channel for discharging sediment, a spiral conveyor blade is rotatably connected in the discharge channel, a transmission cavity is provided in the bottom of the leaching tank, and the conveyor shaft of the spiral conveyor blade The end extends into the transmission cavity, and the lower end of the stirring shaft extends into the transmission cavity and is connected to the transmission shaft through a bevel gear pair.

Preferably, a stirring blade is fixed on a side wall of the rotating shaft located in the hopper.

The beneficial effects of the present invention are:

1. By installing the hopper, magnetic separation box, leaching box and sedimentation box, the rare earth magnetic material waste is ground into powder and poured into the hopper, and the magnetic separation, leaching and sedimentation processes can be automatically completed. The integrated setting has a compact structure and occupies an area The area is small, and the processes of magnetic separation, leachate mixing and sediment discharge can be carried out simultaneously.

2. By installing the magnetic separation box, magnetic strips, rotating shaft, guide plate and annular push plate, the powdery waste falls into the magnetic selection box through the discharge pipe and the discharge port, and the rotating shaft drives multiple guide plates and magnetic separation The box rotates, and the powder waste is thrown out circumferentially through multiple guide plates, thrown to the inner wall of the magnetic separation box, and rotates with it. The multiple magnetic strips arranged circumferentially can magnetically absorb the metal powder in the powder waste. Suction, circumferential rotation achieves uniform magnetic suction, and the magnetic suction is complete. After the magnetic suction is completed, start the cylinder, drive the annular push plate downward through the annular resisting plate and the resisting rod, and then the metal magnetically attracted by the multiple magnetic strips can be Scrape off the powder.

3. By setting up the opening and closing mechanism, when you need to add materials to the magnetic selection box at regular intervals, or when you need to discharge the waste materials that are not magnetically attracted in the magnetic selection box, you only need to control the switch, brush and conductive ring accordingly. The second spring is energized, causing it to shrink when it is energized, and drives the conical stopper to move upward through the connecting rod, thereby opening the unloading pipe or the discharging pipe. In this way of opening, there are no internal settings in the discharging pipe or the discharging pipe. Components, the unloading speed is fast, and the powder in the hopper can evenly fall into the magnetic separation box through the unloading tube to ensure the magnetic separation effect.

4. By setting up the stirring assembly, screw conveyor blade, clutch and bevel gear pair, under the control of the clutch, the rotating shaft can synchronously drive the stirring shaft to rotate, and then drive the mixing plate to rotate, realizing the mixing process of powder and leachate after magnetic separation. The bevel gear pair drives the spiral conveyor blade to rotate, which can discharge the sediment precipitated by the sedimentation agent in the sedimentation tank, with a high degree of integration.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is an enlarged schematic diagram of the structure at point A in Figure 1;

Figure 3 is a cross-sectional view of the expansion tank proposed by the present invention;

Figure 4 is a schematic diagram of the annular push plate pushing state proposed by the present invention;

Figure 5 is a schematic diagram of the open state of the opening and closing mechanism proposed by the present invention.

In the picture: 1 leaching tank, 2 bevel gear pair, 3 mixing plate, 4 stirring shaft, 5 pump liquid pipe, 6 sedimentation tank, 7 discharge channel, 8 screw conveyor blade, 9 clutch, 10 discharge pipe, 11 annular blanking Channel, 12 magnetic box, 13 blanking port, 14 magnetic strip, 15 ring conductive rail, 16 conductive slider, 17 ring push plate, 18 opening and closing mechanism, 19 rotating shaft, 20 bracket, 21 supporting rod, 22 first Spring, 23 hopper, 24 top plate, 25 cylinder, 26 motor, 27 gear, 28 conductive ring, 29 discharge pipe, 30 tapered stopper, 31 connecting rod, 32 strip mouth, 33 second spring, 34 round cavity , 35 sealing sleeve, 36 unloading port, 37 connecting arm, 38 arc baffle, 39 third spring, 40 telescopic groove, 41 guide plate.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation disclosed below.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Referring to Figure 1-5, a device for recovering rare earth oxides from rare earth magnetic material waste includes a leaching box 1. A bracket 20 is fixedly installed on the top of the leaching box 1. A sedimentation tank 6 is installed on one side of the leaching box 1. The bracket 20 A magnetic suction box 12 is rotatably connected to the top. The bottom of the magnetic suction box 12 is provided with a discharge pipe 10. A top plate 24 is fixed on the top of the bracket 20. A hopper 23 located above the magnetic suction box 12 is fixedly connected to the top plate 24. The hopper 23 The bottom is provided with a discharge pipe 29. The top of the magnetic suction box 12 is provided with a discharge opening 36 which is connected to the discharge pipe 29. The top of the hopper 23 is rotatably connected to a rotating shaft 19, and the lower end of the rotating shaft 19 passes through the discharge pipe 29 and the discharge pipe. The opening 36, the magnetic box 12 and the discharge pipe 10, the rotating shaft 19 and the inner wall of the discharge opening 36 are fixedly connected with a plurality of connecting arms 37. A motor 26 is fixedly installed on the top of the hopper 23, and the output end of the motor 26 is connected to the rotating shaft 19. The upper ends are connected through a pair of gears 27.

Two opening and closing mechanisms 18 are installed on the rotating shaft 19. The two opening and closing mechanisms 18 correspond to the unloading pipe 29 and the discharging pipe 10 respectively. The opening and closing mechanisms 18 include a circular cavity 34 arranged in the rotating shaft 19. The circular cavity 34 passes through The second spring 33 is elastically connected to the connecting rod 31. Both sides of the circular cavity 34 are provided with strip-shaped openings 32 for the corresponding ends of the connecting rod 31 to pass through. The outer wall of the rotating shaft 19 is provided with a tapered hole fixedly connected to the connecting rod 31. The conical stopper seat 30 is adapted to the nozzles of the discharge pipe 29 and the discharge pipe 10. The bottom of the conical stopper seat 30 is fixed with a sealing sleeve 35 that is sleeved on the rotating shaft 19. The conical stopper seat 30 is The material seat 30 moves upward, and the sealing sleeve 35 moves upward simultaneously to block the strip opening 32 to prevent powder from entering. Two conductive rings 28 are fixed on the upper end side wall of the rotating shaft 19. The two conductive rings 28 are electrically connected to the two second springs 33 respectively. The conductive ring 28 is connected to a brush externally, and the brush is connected to a control switch externally. The corresponding second spring 33 is energized through the control switch, brush and conductive ring 28, so that it contracts when energized, and drives the cone-shaped stopper seat 30 through the connecting rod 31. Move it upward to open the discharge pipe 29 or the discharge pipe 10.

A plurality of vertically arranged magnetic strips 14 are embedded in the circumferential inner wall of the magnetic selection box 12. A plurality of offset guide plates 41 are fixed on the circumferential side wall of the rotating shaft 19 in the magnetic selection box 12. The rotating shaft 19 The multiple guide plates 41 and the magnetic selection box 12 are driven to rotate, and the powder waste is thrown out circumferentially through the multiple guide plates 41, to the inner wall of the magnetic selection box 12, and rotates with it. Multiple magnetic strips are arranged circumferentially. 14. It can magnetically attract the metal powder that can be magnetically attracted in the powder waste, and rotate it in a circumferential direction to achieve uniform magnetic attraction and complete magnetic attraction.

The bottom of the magnetic box 12 is provided with a plurality of blanking openings 13 corresponding to the magnetic strips 14. The top of the leaching box 1 is provided with an annular blanking channel 11 corresponding to the blanking openings 13. The bracket 20 is fixedly installed with The annular conductive rail 15 is sleeved on the periphery of the magnetic suction box 12. A plurality of conductive sliders 16 that conflict with the annular conductive rail 15 are fixed on the circumferential side wall of the magnetic suction box 12. The conductive sliders 16 are electrically connected to the corresponding third spring 39. Sexual connection, the annular conductive rail 15 is connected to an external control switch, and the annular conductive rail 15 is powered by the control switch, and the corresponding third spring 39 is energized through the conductive slider 16, so that it contracts and pulls the arc baffle 38 into the telescopic slot 40, that is, The blanking port 13 can be opened, and the metal powder falls into the leaching box 1 through the annular blanking channel 11 .

The magnetic suction box 12 is equipped with an annular push plate 17 that can push the magnetically attracted waste materials on the multiple magnetic suction strips 14 to the discharge port 13. The tops of both sides of the annular push plate 17 are fixedly connected with the magnetic suction box 12 extending out. The butt rod 21 is provided with a first spring 22. The upper end of the butt rod 21 is fixedly connected with an annular butt plate 41. A cylinder 25 is installed on the top plate 24 for pushing the annular butt plate 41 to move downward. The cylinder 25 is started. , the annular push plate 17 is driven downward by the annular resisting plate 41 and the resisting rod 21, so that the metal powder magnetically attracted on the plurality of magnetic strips 14 can be scraped off.

A stirring assembly connected to the rotating shaft 19 is installed in the leaching tank 1. A pump liquid pipe 5 is provided in the settling tank 6 to pump the leachate in the leaching tank 1 into the settling tank 6. The stirring assembly includes a stirring assembly that is rotatably connected in the leaching tank 1. The stirring shaft 4 has a plurality of liquid mixing plates 3 fixed on the stirring shaft 4. The upper end of the stirring shaft 4 extends out of the leaching tank 1 and is connected to the lower end of the rotating shaft 19 through the clutch 9. The bottom of the settling tank 6 is provided with a Discharge channel 7, a spiral conveyor blade 8 is rotatably connected in the discharge channel 7, a transmission cavity is provided at the bottom of the leaching box 1, the end of the conveyor shaft of the spiral conveyor blade 8 extends into the transmission cavity, and the lower end of the stirring shaft 4 extends to the transmission cavity The inner conveyor and the conveyor shaft are connected through a bevel gear pair 2. Under the control of the clutch 9, the rotating shaft 19 can synchronously drive the stirring shaft 4 to rotate, and then drive the mixing plate 3 to rotate, thereby realizing the mixing process of the powder and leachate after magnetic separation. , pump the leachate into the sedimentation tank 6 through the pump pipe 5, add the precipitant, and the metal precipitate will sink into the discharge channel 7. The bevel gear pair 2 will drive the spiral conveyor blade 8 to rotate, and the precipitate will be discharged.

In addition, a stirring blade is fixed on a side wall of the rotating shaft 19 located in the hopper 23. The rotating shaft 19 drives the stirring blade to rotate synchronously, which can stir the powder in the hopper and make it easy to discharge the powder.

The rare earth magnetic material waste is first ground into powder by the crushing equipment and then poured into the hopper 23. The powdery waste material falls into the magnetic separation box 12 through the discharge pipe 29 and the discharge port 36. The motor 26 is started to drive the rotating shaft through a pair of gears 27. 19 rotates, the rotating shaft 19 drives the plurality of guide plates 41 and the magnetic separation box 12 to rotate, and the powder waste is thrown out circumferentially through the plurality of guide plates 41, to the inner wall of the magnetic separation box 12, and rotates with it, and the circumferentially arranged The multiple magnetic strips 14 can magnetically attract the metal powder that can be magnetically attracted in the powder waste, and the circumferential rotation can achieve uniform magnetic attraction and complete magnetic attraction. After the magnetic attraction is completed, the cylinder 25 is started, and the annular resisting plate 41 and the resisting force are used. The rod 21 drives the annular push plate 17 to move downward, which can scrape off the magnetically attracted metal powder on the multiple magnetic strips 14. The annular conductive rail 15 is powered through the control switch, and the corresponding third spring 39 is supplied through the conductive slider 16. Turn on the electricity and cause it to shrink and pull the arc baffle 38 into the telescopic groove 40, then the blanking port 13 can be opened, and the metal powder falls into the leaching box 1 through the annular blanking channel 11.

When it is necessary to add materials to the magnetic selection box 12 at regular intervals, or when it is necessary to discharge the waste materials that are not magnetically attracted in the magnetic selection box 12, it is only necessary to energize the corresponding second spring 33 through the control switch, brush and conductive ring 28. , causing it to shrink when it is energized, and the conical stopper seat 30 is driven upward through the connecting rod 31, and the discharge pipe 29 or the discharge pipe 10 can be opened. In this way of opening, the insides of the discharge pipe 29 and the discharge pipe 10 are both No components are provided, the unloading speed is fast, and the powder in the hopper 23 can evenly fall into the magnetic separation box 12 through the unloading pipe 29 circumferentially, ensuring the magnetic separation effect.

Inject the leaching liquid into the leaching tank 1. Under the control of the clutch 9, the rotating shaft 19 can synchronously drive the stirring shaft 4 to rotate, and then drive the mixing plate 3 to rotate, realizing the mixing process of the magnetically separated powder and the leaching liquid, and pumping the liquid through the pump pipe 5 The leachate is pumped into the sedimentation tank 6, and the precipitant is added to sink the metal sediment into the discharge channel 7. The bevel gear pair 2 drives the spiral conveyor blade 8 to rotate, and the sediment is discharged. After being discharged, it is filtered and sent to Rare earth oxides can be obtained in the calciner.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. The utility model provides an utilize rare earth magnetic material waste material to retrieve device of rare earth oxide, includes leaching case (1), its characterized in that, leaching case (1) top fixed mounting has support (20), and one side of leaching case (1) is installed and is precipitated case (6), rotate on support (20) and be connected with magnetic suction case (12), the bottom of magnetic suction case (12) is equipped with discharging pipe (10), the top of support (20) is fixed with roof (24), fixedly connected with hopper (23) that are located magnetic suction case (12) top on roof (24), the bottom of hopper (23) is equipped with unloading pipe (29), the top of magnetic suction case (12) is equipped with feed opening (36) with unloading pipe (29) butt joint, the top rotation of hopper (23) is connected with pivot (19), the lower extreme of pivot (19) runs through unloading pipe (29), feed opening (36), magnetic suction case (12) and discharging pipe (10), and pivot (19) are connected with many linking arms (37) with the inner wall between feed opening (36) fixedly between inner wall, two pivot (19) and two mechanism (18) are installed respectively to two mechanism (18), the utility model discloses a leaching tank, including magnetic suction box (12), rotary shaft (19), stirring subassembly, setting up in leaching box (1), including magnetic suction box (12), annular push pedal (17) that are equipped with many vertical setting's magnetism on the circumference inner wall of magnetic suction box (12) and inhale strip (14), magnetic suction box (12) bottom be equipped with a plurality of blanking mouthful (13) with magnetic suction strip (14) one-to-one, install in magnetic suction box (12) can push away waste material that magnetic suction was inhaled on a plurality of magnetic suction strip (14) to blanking mouthful (13) annular push pedal (17), be located in magnetic separation box (12) the circumference lateral wall of rotary shaft (19) is fixed with a plurality of dislocation set's stock guide (41), the top of leaching box (1) is equipped with annular blanking passageway (11) that correspond with blanking mouthful (13), install in leaching box (1) with the stirring subassembly of rotary shaft (19) butt joint, be equipped with in sedimentation box (6) and pump liquid pipe (5) that can pump leaching liquid in leaching box (1) into sedimentation box (6).

2. The device for recycling rare earth oxide by utilizing the rare earth magnetic material waste according to claim 1, wherein the top parts of two sides of the annular pushing plate (17) are fixedly connected with a supporting rod (21) extending out of the magnetic suction box (12), a first spring (22) is sleeved on the supporting rod (21), the upper end of the supporting rod (21) is fixedly connected with an annular retaining plate (41), and a cylinder (25) for pushing the annular retaining plate (41) to move downwards is arranged on the top plate (24).

3. The device for recycling rare earth oxide by utilizing rare earth magnetic material waste according to claim 1, wherein a motor (26) is fixedly arranged at the top of the hopper (23), and the output end of the motor (26) is in transmission connection with the upper end of the rotating shaft (19) through a pair of gears (27).

4. The device for recycling rare earth oxide by utilizing rare earth magnetic material waste according to claim 1, wherein the opening and closing mechanism (18) comprises a round cavity (34) arranged in the rotating shaft (19), the round cavity (34) is elastically connected with a connecting rod (31) through a second spring (33), strip-shaped openings (32) for the corresponding ends of the connecting rod (31) to penetrate out are formed in two sides of the round cavity (34), a conical material blocking seat (30) fixedly connected with the connecting rod (31) is sleeved on the outer wall of the rotating shaft (19), the conical material blocking seat (30) is matched with the opening of the blanking pipe (29) and the opening of the discharging pipe (10), and a sealing sleeve (35) sleeved on the rotating shaft (19) is fixedly arranged at the bottom of the conical material blocking seat (30).

5. The device for recycling rare earth oxide by utilizing rare earth magnetic material waste according to claim 4, wherein two conducting rings (28) are fixed on the upper end side wall of the rotating shaft (19), the two conducting rings (28) are respectively and electrically connected with two second springs (33), the conducting rings (28) are externally connected with an electric brush, and the electric brush is externally connected with a control switch.

6. The device for recycling rare earth oxide by utilizing rare earth magnetic material waste according to claim 1, wherein a telescopic groove (40) communicated with a corresponding blanking port (13) is arranged at the bottom of the magnetic suction box (12), and an arc-shaped baffle plate (38) extending into the blanking port (13) is elastically connected in the telescopic groove (40) through a third spring (39).

7. The device for recycling rare earth oxide by utilizing rare earth magnetic material waste according to claim 6, wherein an annular conductive rail (15) sleeved on the periphery of the magnetic suction box (12) is fixedly installed on the support (20), a plurality of conductive sliding blocks (16) which are in contact with the annular conductive rail (15) are fixed on the circumferential side wall of the magnetic suction box (12), the conductive sliding blocks (16) are electrically connected with corresponding third springs (39), and the annular conductive rail (15) is externally connected with a control switch.

8. The device for recycling rare earth oxide by utilizing rare earth magnetic material waste according to claim 1, wherein the stirring assembly comprises a stirring shaft (4) rotatably connected in the leaching tank (1), a plurality of liquid mixing plates (3) are fixed on the stirring shaft (4), and the upper end of the stirring shaft (4) extends out of the leaching tank (1) and is in butt joint with the lower end of the rotating shaft (19) through a clutch (9).

9. The device for recycling rare earth oxide by utilizing rare earth magnetic material waste according to claim 8, wherein a discharge channel (7) for discharging sediment is arranged at the bottom of the sedimentation tank (6), a spiral conveying blade (8) is rotationally connected in the discharge channel (7), a transmission cavity is arranged in the bottom of the leaching tank (1), the tail end of a conveying shaft of the spiral conveying blade (8) extends into the transmission cavity, and the lower end of the stirring shaft (4) extends into the transmission cavity and is in transmission connection with the conveying shaft through a bevel gear pair (2).

10. The device for recovering rare earth oxides by utilizing the waste of rare earth magnetic materials according to claim 1, wherein the stirring blade is fixed on a section of side wall of the rotating shaft (19) positioned in the hopper (23).