Device and method for recovering rare earth from rare earth waste

Abstract

The invention discloses a device and method for recycling rare earth from rare earth waste, and relates to the technical field of rare earth recycling, the device comprises a base, a recycling box assembly and a rolling assembly, the recycling box assembly is arranged at the outer end of the base, and a discharging assembly is arranged at the bottom of the base; the discharging assembly comprises a first column body, a first ventilation pipe, a suction integrated pump, a rotating base, a second column body, a second ventilation pipe, a grinding disc and a ventilation opening. The motor rotates at a high speed, due to the fact that rare earth materials have magnetism, rare earth in rare earth waste can be adsorbed to the surface of the grinding disc under the adsorption effect of the electromagnet, non-rare earth waste can be close to the edge position of the grinding disc under the high-speed rotation of the motor due to centrifugal force, and the suction opening is located in the edge position of the grinding base; at the moment, the suction pump works, suction force can be transmitted to the suction opening through the suction groove, and the rare earth can be quickly screened out from the rare earth waste by the equipment through the operation.

Description

Technical Field

[0001] The invention relates to the technical field of rare earth recovery, and in particular to a device and method for recovering rare earth from rare earth waste. Background Art

[0002] Rare earths are a group of metallic elements composed of 17 chemical elements, including 15 lanthanide elements (lanthanum, cerium, neodymium, platinum, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, lutetium, ytterbium, and cymbalium) as well as scandium and yttrium. Rare earths are mainly used to manufacture permanent magnets, catalysts, alloy additives, etc. Rare earths are known as industrial vitamins and are widely used in the field of high-tech. With the development of emerging industries, the demand for rare earths will continue to grow. Among them, the sustainable utilization and recycling of rare earth resources are the future development direction. Therefore, recovery devices for recovering rare earths from rare earth waste are widely used.

[0003] Common rare earth recovery devices on the market usually need to crush and grind rare earth waste, then extract rare earths from the ground fine waste, and then carry out subsequent purification work. However, the initial crushing and grinding work is time-consuming, and it is difficult to screen rare earths from completely crushed fine waste, which leads to low efficiency of rare earth recovery.

[0004] Therefore, in view of this, research and improvement are conducted on the existing structure and defects, and a device and method for recovering rare earth from rare earth waste are proposed. Summary of the invention

[0005] The object of the present invention is to provide a device and method for recovering rare earth from rare earth waste to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an apparatus and method for recovering rare earths from rare earth waste, comprising a base, a recovery box assembly and a rolling assembly, wherein the outer end of the base is provided with a recovery box assembly, and the bottom of the base is provided with a discharge assembly, the discharge assembly comprising a first column, a first vent pipe, a suction integrated pump, a rotating seat, a second column, a second vent pipe, a grinding disc and a vent, a first vent pipe is provided inside the first column, a suction integrated pump is arranged on the outer side of the bottom of the base, the first column is connected to the second column through the rotating seat, and a second vent pipe is provided inside the second column, a grinding disc is arranged on the top of the second column, and a vent is arranged on the inner side of the grinding disc, and a rolling assembly is arranged at the top bottom of the base.

[0007] Furthermore, the recycling box assembly includes a supporting bearing seat, a box body, a driven gear, a driving gear, a motor and an electromagnet. The box body is placed on the inner side of the supporting bearing seat, and the driven gear is arranged at the outer end of the box body. The driving gear is placed at the outer end of the driven gear, and the motor is arranged at the bottom of the driving gear. The electromagnet is placed inside the box body.

[0008] Furthermore, the motor drives the driven gear to rotate via the driving gear, and the driven gear drives the housing to rotate inside the supporting bearing seat.

[0009] Furthermore, the box body is concentrically arranged with the grinding disc, and the grinding disc is fixedly connected with the electromagnet.

[0010] Furthermore, the integrated suction pump is connected to the vent through the first vent pipe and the second vent pipe, and the outer end of the vent is covered with a valve sheet.

[0011] Furthermore, the second cylinder is integrated with the grinding disc, and the first cylinder, the second cylinder and the grinding disc are concentrically arranged.

[0012] Furthermore, the rolling assembly includes a hydraulic rod, a lifting seat, a connecting column, a suction pump, a rolling seat, a suction groove and a suction port, the output end of the hydraulic rod is connected to the lifting seat, and the bottom end of the lifting seat is connected to the connecting column, a suction pump is arranged on the outer side of the top of the lifting seat, a rolling seat is arranged on the outer side of the bottom of the suction pump, and suction grooves are provided on the inner sides of the connecting column and the rolling seat, and a suction port is provided at the bottom end of the rolling seat.

[0013] Furthermore, the connecting column and the rolling seat are integrated, and the outer contour of the rolling seat matches the inner contour size of the grinding disc.

[0014] Furthermore, the suction port is distributed in a ring shape at the bottom end of the rolling seat, and the suction port is connected to the suction groove.

[0015] A method for recovering rare earth from rare earth waste, which is used in a device for recovering rare earth from rare earth waste, characterized in that the measuring method comprises the following steps: S1: The staff opens the box, places the rare earth waste to be refined in the grinding disc, and then closes the box. At this time, the hydraulic rod works, driving the lifting seat to move downward, which makes the connecting column drive the rolling seat to move downward, so that the rolling seat extends into the grinding disc to crush the rare earth waste inside the grinding disc; S2: The motor works, and the driven gear is driven to rotate through the driving gear. Because the driven gear is fixed to the housing, the housing rotates inside the supporting bearing seat, and the housing drives the grinding disc to rotate synchronously during the rotation, so that the rolling seat can crush the rare earth waste inside the grinding disc, and can also grind the rare earth waste by approaching the grinding disc; S3: The motor rotates at high speed. Because rare earth materials are magnetic, under the adsorption of electromagnets, the rare earth in the rare earth waste will be adsorbed on the surface of the grinding disc, while the non-rare earth waste will approach the edge of the grinding disc due to centrifugal force under the high-speed rotation of the motor. Through the suction pump, the suction force is transmitted to the suction port through the suction groove. Through the above operations, the equipment can quickly screen out the rare earth from the rare earth waste; S4: The first ventilation pipe in the first column is rotated to a position connected to the second ventilation pipe in the second column by the operation of the motor. After the first ventilation pipe is rotated to the position, the motor stops working. At this time, the suction integrated pump works to blow air. High-speed gas enters the grinding disc through the first ventilation pipe, the second ventilation pipe and the suction port to blow and mix the rare earth. By blowing and mixing, non-rare earth waste mixed in the rare earth is effectively blown out. By subsequent secondary centrifugation, the purity of the rare earth is effectively improved, thereby facilitating subsequent rare earth purification work; S5: The motor rotates again to the position where the first ventilation pipe is connected to the second ventilation pipe. At this time, the integrated suction pump performs suction work to suck out and store the rare earth that has been screened in the grinding disc.

[0016] The present invention provides a device and method for recovering rare earth from rare earth waste, which has the following beneficial effects: 1. When the hydraulic rod of the present invention is working, it can drive the lifting seat to move downward, so that the connecting column can drive the rolling seat to move downward, which enables the rolling seat to extend into the grinding disc to crush the rare earth waste inside the grinding disc. After the box is closed, the motor works and can drive the driven gear to rotate through the driving gear. Because the driven gear is fixed to the box, the box can rotate inside the supporting bearing seat, so that the box can drive the grinding disc to rotate synchronously during the rotation. Through this design, when the rolling seat crushes the rare earth waste inside the grinding disc, the rare earth waste can also be ground by approaching the grinding disc. Through crushing and grinding, the crushing effect and crushing efficiency of the rare earth waste can be greatly improved, and the centrifugal force generated by the rotation can also make the rare earth waste of different sizes after crushing roll in the grinding disc, which can improve the uniformity of the crushing of the rare earth waste.

[0017] 2. The motor of the present invention rotates at a high speed. Since the rare earth material is magnetic, the rare earth in the rare earth waste will be adsorbed on the surface of the grinding disc under the adsorption effect of the electromagnet, while the non-rare earth waste will be close to the edge of the grinding disc due to the centrifugal force under the high-speed rotation of the motor. The suction port is located at the edge of the rolling seat. At this time, the suction pump works to transmit the suction force to the suction port through the suction groove. Through the above operation, the equipment can quickly screen out the rare earth from the rare earth waste and quickly remove the non-rare earth waste. The components used in the above operation process are all components in the rare earth waste crushing and grinding process, which makes it possible for the crushing, grinding and recovery of the rare earth to be carried out in the same step, which can greatly improve the working efficiency of the equipment.

[0018] 3. The present invention can rotate the first ventilation pipe inside the first column to a position connected with the second ventilation pipe inside the second column through the operation of the motor. After rotating to this position, the motor stops working. At this time, the suction integrated pump works to blow air, and high-speed gas can enter the grinding disc through the first ventilation pipe, the second ventilation pipe, and the suction port to blow and stir the rare earth. By blowing and stirring, non-rare earth waste mixed in the rare earth can be effectively blown out. Through the subsequent secondary centrifugation, the purity of the rare earth can be effectively improved, thereby facilitating the subsequent rare earth purification work. In addition, after the rare earth screening is completed, the motor rotates again to the position where the first ventilation pipe is connected to the second ventilation pipe. At this time, the suction integrated pump performs suction work, and the rare earth screened in the grinding disc can be sucked out and stored. Thanks to the protection of the box body and the rolling seat grinding, crushing, screening and discharging inside the grinding disc, this can effectively avoid the problem of dust and scattering of rare earth waste during the grinding and crushing process. At the same time, through multiple isolations, it can effectively avoid interference with the extraction of rare earth by external factors, which can improve the use stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a device for recovering rare earth from rare earth waste according to the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of a device for recovering rare earth from rare earth waste according to the present invention; Figure 3 This is a schematic structural diagram of a recovery box assembly of a device for recovering rare earths from rare earth waste materials according to the present invention; Figure 4 This is a schematic diagram of the structure of a rolling assembly of a device for recovering rare earth from rare earth waste materials according to the present invention; Figure 5 This is a schematic diagram of the explosion structure of a discharge assembly of a device for recovering rare earth from rare earth waste in the present invention; Figure 6 This is a schematic diagram of the top view of the grinding disc of a device for recovering rare earth from rare earth waste according to the present invention; Figure 7 The present invention is a schematic diagram of the connection structure between the grinding disc and the electromagnet of a device for recovering rare earth from rare earth waste.

[0020] In the figure: 1. base; 2. recycling box assembly; 201. supporting bearing seat; 202. box body; 203. driven gear; 204. driving gear; 205. motor; 206. electromagnet; 3. discharging assembly; 301. first column; 302. first ventilation pipe; 303. suction integrated pump; 304. rotating seat; 305. second column; 306. second ventilation pipe; 307. grinding disc; 308. vent; 4. rolling assembly; 401. hydraulic rod; 402. lifting seat; 403. connecting column; 404. suction pump; 405. rolling seat; 406. suction groove; 407. suction port. DETAILED DESCRIPTION

[0021] See also Figures 1 to 7 The present invention provides a technical solution: a device and method for recovering rare earth from rare earth waste, comprising a base 1, a recovery box assembly 2 and a rolling assembly 4, the outer end of the base 1 is provided with the recovery box assembly 2, and the bottom of the base 1 is provided with a discharge assembly 3, the discharge assembly 3 comprises a first column 301, a first vent pipe 302, a suction integrated pump 303, a rotating seat 304, a second column 305, a second vent pipe 306, a grinding disc 307 and a vent 308, the first column 301 is provided with a first vent pipe 302, a suction integrated pump 303 is arranged on the outer side of the bottom of the base 1, the first column 301 is connected to the second column 305 through the rotating seat 304, and the second vent pipe 306 is arranged inside the second column 305, a grinding disc 307 is arranged on the top of the second column 305, and a vent 308 is arranged on the inner side of the grinding disc 307, and the rolling assembly 4 is arranged at the top bottom of the base 1.

[0022] See also Figures 1 to 7The recycling box assembly 2 includes a supporting bearing seat 201, a box body 202, a driven gear 203, a driving gear 204, a motor 205 and an electromagnet 206. The box body 202 is arranged on the inner side of the supporting bearing seat 201, and the outer end of the box body 202 is provided with a driven gear 203, the outer end of the driven gear 203 is provided with a driving gear 204, and the bottom of the driving gear 204 is provided with a motor 205, and the inside of the box body 202 is provided with an electromagnet 206, and the electromagnet 206 is arranged. The machine 205 drives the driven gear 203 to rotate through the driving gear 204, and the driven gear 203 drives the box body 202 to rotate inside the supporting bearing seat 201. The box body 202 is concentrically arranged with the grinding disc 307, and the grinding disc 307 is fixedly connected with the electromagnet 206. The suction integrated pump 303 is connected with the vent 308 through the first vent pipe 302 and the second vent pipe 306, and the outer end of the vent 308 is covered with a valve sheet. The second column 305 is connected with the grinding disc 307. The plate 307 is integrated, and the first column 301, the second column 305 and the grinding plate 307 are concentrically arranged. The rolling assembly 4 includes a hydraulic rod 401, a lifting seat 402, a connecting column 403, a suction pump 404, a rolling seat 405, a suction groove 406 and a suction port 407. The output end of the hydraulic rod 401 is connected to the lifting seat 402, and the bottom end of the lifting seat 402 is connected to the connecting column 403. The top outer side of the lifting seat 402 is provided with a suction pump 404. 4. A rolling seat 405 is arranged on the outer side of the bottom of the suction pump 404, and a suction groove 406 is provided on the inner side of the connecting column 403 and the rolling seat 405. A suction port 407 is provided at the bottom end of the rolling seat 405. The connecting column 403 and the rolling seat 405 are integrated, and the outer contour of the rolling seat 405 matches the inner contour size of the grinding disc 307. The suction port 407 is distributed in a ring shape at the bottom end of the rolling seat 405, and the suction port 407 is connected to the suction groove 406; The specific operation is as follows: after the staff opens the box 202, the rare earth waste to be refined is placed in the grinding disc 307, and then the box 202 is closed. At this time, the hydraulic rod 401 works and can drive the lifting seat 402 to move downward, which enables the connecting column 403 to drive the rolling seat 405 to move downward, so that the rolling seat 405 can extend into the grinding disc 307 to crush the rare earth waste inside the grinding disc 307. After the box 202 is closed, the motor 205 works and can drive the driven gear 203 to rotate through the driving gear 204. Because the driven gear 203 is fixed to the box 202, the box 202 can rotate inside the supporting bearing seat 201, so that the box 202 can drive the grinding disc during the rotation. 307 rotates synchronously. With this design, when the rolling seat 405 crushes the rare earth waste inside the grinding disc 307, the rare earth waste can also be ground by approaching the grinding disc 307. The crushing and grinding can greatly improve the crushing effect and efficiency of the rare earth waste, and the centrifugal force generated by the rotation can also make the rare earth waste of different sizes after crushing roll in the grinding disc 307, which can improve the uniformity of the crushing of the rare earth waste. After the crushing and grinding of the rare earth waste is completed, the motor 205 rotates at a high speed. Because the rare earth material has magnetism, under the adsorption effect of the electromagnet 206, the rare earth in the rare earth waste will be adsorbed on the surface of the grinding disc 307, while the non-rare earth waste will be close to the grinding disc 307 due to the centrifugal force under the high-speed rotation of the motor 205. The edge position of the grinding disc 307 and the suction port 407 are located at the edge position of the grinding seat 405. At this time, the suction pump 404 works, and the suction force can be transmitted to the suction port 407 through the suction groove 406. Through the above operation, the equipment can quickly screen out rare earth from rare earth waste and quickly remove non-rare earth waste. The components used in the above operation process are all components in the rare earth waste crushing and grinding process, which makes it possible to crush and grind and recover rare earth in the same step, which can greatly improve the working efficiency of the equipment. After the suction port 407 completes the suction of non-rare earth waste, the motor 205 works to make the first ventilation pipe 302 inside the first column 301 rotate to the second ventilation pipe 302 inside the second column 305. The position where the air pipe 306 is connected, after rotating to this position, the motor 205 stops working, and the suction pump 303 works to blow air. The high-speed gas can enter the grinding disc 307 through the first ventilation pipe 302, the second ventilation pipe 306, and the suction port 407 to blow and mix the rare earth. The non-rare earth waste mixed in the rare earth can be effectively blown out by blowing and mixing. The purity of the rare earth can be effectively improved by subsequent secondary centrifugation, thereby facilitating the subsequent rare earth purification work. In addition, after the rare earth screening is completed, the motor 205 rotates again to the position where the first ventilation pipe 302 and the second ventilation pipe 306 are connected. At this time, the suction pump 303 performs suction work, and the rare earth screened in the grinding disc 307 can be sucked out and stored.Thanks to the protection of the box 202 and the grinding, crushing, screening and discharging of the grinding disc 307 by the rolling seat 405, the dust and scattering of the rare earth waste during the grinding and crushing process can be effectively avoided. At the same time, through multiple isolation, the interference of external factors on the extraction of rare earth can be effectively avoided, which can improve the stability of the equipment.

[0023] In summary, the device and method for recovering rare earth from rare earth waste, when in use, firstly, the staff opens the box 202, places the rare earth waste to be refined in the grinding disc 307, and then closes the box 202, at which time the hydraulic rod 401 works, which can drive the lifting seat 402 to move downward, so that the connecting column 403 can drive the rolling seat 405 to move downward, so that the rolling seat 405 can extend into the grinding disc 307 to crush the rare earth waste in the grinding disc 307; Then, after the box body 202 is closed, the motor 205 works and can drive the driven gear 203 to rotate through the driving gear 204. Since the driven gear 203 is fixed to the box body 202, the box body 202 can rotate inside the supporting bearing seat 201, so that the box body 202 can drive the grinding disc 307 to rotate synchronously during the rotation. Through this design, when the rolling seat 405 crushes the rare earth waste inside the grinding disc 307, the rare earth waste can also be ground by approaching the grinding disc 307. Through crushing and grinding, the crushing effect and crushing efficiency of the rare earth waste can be greatly improved, and the centrifugal force generated by the rotation can also make the rare earth waste of different sizes after crushing roll in the grinding disc 307, which can improve the uniformity of the crushing of the rare earth waste. After the rare earth waste is crushed and ground, the motor 205 rotates at a high speed. Because the rare earth material is magnetic, the rare earth in the rare earth waste will be adsorbed on the surface of the grinding disc 307 under the adsorption effect of the electromagnet 206, and the non-rare earth waste will be close to the edge of the grinding disc 307 due to the centrifugal force under the high-speed rotation of the motor 205. The suction port 407 is located at the edge of the rolling seat 405. At this time, the suction pump 404 works to transmit the suction force to the suction port 407 through the suction groove 406. Through the above operation, the equipment can quickly screen out the rare earth from the rare earth waste and quickly remove the non-rare earth waste. The components used in the above operation process are all components in the rare earth waste crushing and grinding process, which enables the crushing and grinding of rare earth and the recovery of rare earth to be carried out in the same step, which can greatly improve the working efficiency of the equipment. After the suction port 407 completes suction of the non-rare earth waste, the motor 205 can rotate the first ventilation pipe 302 inside the first column 301 to a position connected to the second ventilation pipe 306 inside the second column 305. After rotating to this position, the motor 205 stops working, and the suction integrated pump 303 works to blow air. High-speed gas can enter the grinding disc 307 through the first ventilation pipe 302, the second ventilation pipe 306, and the suction port 407 to blow and mix the rare earth. By blowing and mixing, the non-rare earth waste mixed in the rare earth can be effectively blown out, and the purity of the rare earth can be effectively improved through the subsequent secondary centrifugation, thereby facilitating the subsequent rare earth purification work; Finally, after the rare earth screening is completed, the motor 205 rotates again to the position where the first ventilation pipe 302 is connected to the second ventilation pipe 306. At this time, the suction integrated pump 303 performs suction work, and the rare earth that has been screened in the grinding disk 307 can be sucked out and stored. Thanks to the protection of the box body 202 and the rolling seat 405, the grinding, crushing, screening and discharging are performed inside the grinding disk 307, which can effectively avoid the problem of dust and scattering of rare earth waste during the grinding and crushing process. At the same time, through multiple isolations, it can effectively avoid external factors from interfering with the extraction of rare earths, which can improve the stability of equipment use.

[0024] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A device for recovering rare earth from rare earth waste, characterized in that: The invention comprises a base (1), a recovery box assembly (2) and a rolling assembly (4), wherein the outer end of the base (1) is provided with the recovery box assembly (2), and the bottom of the base (1) is provided with a discharge assembly (3), wherein the discharge assembly (3) comprises a first column (301), a first ventilation pipe (302), a suction integrated pump (303), a rotating seat (304), a second column (305), a second ventilation pipe (306), a grinding disc (307) and a vent (308), wherein the interior of the first column (301) is provided with a A first ventilation pipe (302) is provided, a suction integrated pump (303) is arranged on the outer side of the bottom of the base (1), the first column (301) is connected to the second column (305) through a rotating seat (304), and a second ventilation pipe (306) is provided inside the second column (305), a grinding disc (307) is arranged on the top of the second column (305), and a ventilation port (308) is provided on the inner side of the grinding disc (307), and a rolling assembly (4) is arranged at the top bottom of the base (1).

2. The device for recovering rare earth from rare earth waste according to claim 1, characterized in that: The recovery box assembly (2) comprises a supporting bearing seat (201), a box body (202), a driven gear (203), a driving gear (204), a motor (205) and an electromagnet (206); the box body (202) is arranged on the inner side of the supporting bearing seat (201), and the outer end of the box body (202) is provided with a driven gear (203); the outer end of the driven gear (203) is provided with a driving gear (204), and the bottom of the driving gear (204) is provided with a motor (205); and the inside of the box body (202) is provided with an electromagnet (206).

3. The device for recovering rare earth from rare earth waste according to claim 2, characterized in that: The motor (205) drives the driven gear (203) to rotate via the driving gear (204), and the driven gear (203) drives the box (202) to rotate inside the supporting bearing seat (201).

4. The device for recovering rare earth from rare earth waste according to claim 2, characterized in that: The box body (202) and the grinding disc (307) are arranged concentrically, and the grinding disc (307) and the electromagnet (206) are fixedly connected.

5. The device for recovering rare earth from rare earth waste according to claim 1, characterized in that: The integrated suction pump (303) is connected to the vent (308) via the first vent pipe (302) and the second vent pipe (306), and the outer end of the vent (308) is covered with a valve sheet.

6. The device for recovering rare earth from rare earth waste according to claim 1, characterized in that: The second column (305) and the grinding disc (307) are integrated, and the first column (301), the second column (305) and the grinding disc (307) are concentrically arranged.

7. The device for recovering rare earth from rare earth waste according to claim 1, characterized in that: The rolling assembly (4) comprises a hydraulic rod (401), a lifting seat (402), a connecting column (403), a suction pump (404), a rolling seat (405), a suction groove (406) and a suction port (407), wherein the output end of the hydraulic rod (401) is connected to the lifting seat (402), and the bottom end of the lifting seat (402) is connected to the connecting column (403), the suction pump (404) is arranged on the outer side of the top of the lifting seat (402), the rolling seat (405) is arranged on the outer side of the bottom of the suction pump (404), the suction groove (406) is provided on the inner side of the connecting column (403) and the rolling seat (405), and the suction port (407) is provided at the bottom end of the rolling seat (405).

8. The device for recovering rare earth from rare earth waste according to claim 7, characterized in that: The connecting column (403) and the rolling seat (405) are integrated, and the outer contour of the rolling seat (405) matches the inner contour size of the grinding disc (307).

9. The device for recovering rare earth from rare earth waste according to claim 7, characterized in that: The suction port (407) is distributed in a ring shape at the bottom end of the rolling seat (405), and the suction port (407) is connected to the suction groove (406).

10. A method for recovering rare earth from rare earth waste, which is used in the device for recovering rare earth from rare earth waste as claimed in any one of claims 1 to 9, characterized in that: The measurement method includes the following steps: S1: The staff opens the box (202), places the rare earth waste to be refined in the grinding disc (307), and then closes the box (202). At this time, the hydraulic rod (401) works to drive the lifting seat (402) to move downward, which makes the connecting column (403) drive the rolling seat (405) to move downward, so that the rolling seat (405) extends into the grinding disc (307) to crush the rare earth waste inside the grinding disc (307); S2: The motor (205) works, and drives the driven gear (203) to rotate through the driving gear (204). Since the driven gear (203) is fixed to the housing (202), the housing (202) rotates inside the supporting bearing seat (201), and the housing (202) drives the grinding disc (307) to rotate synchronously during the rotation process, so that the rolling seat (405) can crush the rare earth waste inside the grinding disc (307) and grind the rare earth waste by approaching the grinding disc (307); S3: The motor (205) rotates at a high speed. Since the rare earth material has magnetism, the rare earth in the rare earth waste will be adsorbed on the surface of the grinding disc (307) under the adsorption effect of the electromagnet (206), while the non-rare earth waste will approach the edge of the grinding disc (307) due to the centrifugal force under the high-speed rotation of the motor (205). The suction pump (404) works to transmit the suction force to the suction port (407) through the suction groove (406). Through the above operation, the device can quickly screen out the rare earth from the rare earth waste; S4: The first ventilation pipe (302) inside the first column (301) is rotated to a position connected to the second ventilation pipe (306) inside the second column (305) by the operation of the motor (205). After the rotation to the position, the motor (205) stops working, and the suction integrated pump (303) works to blow air. High-speed gas enters the grinding disc (307) through the first ventilation pipe (302), the second ventilation pipe (306), and the suction port (407), and blows and stirs the rare earth. By blowing and stirring, non-rare earth waste mixed in the rare earth is effectively blown out, and the purity of the rare earth is effectively improved by subsequent secondary centrifugation, thereby facilitating the subsequent rare earth purification work; S5: The motor (205) rotates again to a position where the first ventilation pipe (302) is connected to the second ventilation pipe (306). At this time, the suction integrated pump (303) performs suction work to suck out and store the rare earth that has been screened in the grinding disc (307).

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