Rare earth neodymium iron boron waste recovery device and process

Abstract

The invention relates to the technical field of metallurgy, in particular to a rare earth neodymium iron boron waste recovery device and process. The rare earth neodymium iron boron waste recovery device comprises a metallurgical furnace and a feeding port formed in the metallurgical furnace, a flat hopper is arranged above the feeding port, a water shell is arranged behind the flat hopper, the front end of the water shell extends to form a shell, and the shell penetrates through the interior of the flat hopper; the front end face of the outer shell and the rear end face of the interior of the flat hopper are coplanar, a magnetic plate is embedded in the outer shell, the front end face of the magnetic plate and the front end face of the outer shell are coplanar, the upper end of the water shell is fixedly communicated with a water outlet pipe, the lower end of the water shell is fixedly communicated with a water inlet pipe, and a flow control swing part is arranged in the water shell in a penetrating mode. The proportion of neodymium-containing oxide in waste is guaranteed, stable reaction with a continuously and quantitatively fed reducing agent is guaranteed, the phenomenon of high-temperature demagnetization of the magnetic plate is avoided, and meanwhile crushed iron adsorbed on the magnetic plate can be automatically cleaned and discharged.

Description

Technical Field

[0001] The present invention relates to the field of metallurgy technology, and in particular to a rare earth neodymium iron boron waste recovery device and process. Background Art

[0002] The recycling and metallurgical treatment of rare earth NdFeB waste is a key link in realizing the recycling of rare earth resources. Its core goal is to efficiently separate and purify the rare earth elements (such as neodymium, praseodymium, etc.), iron and other metals in the waste so that they can be reused in the production of new materials.

[0003] The iron content of rare earth NdFeB scrap is approximately 60%-70%, making it one of the main components of the scrap and providing excellent magnetic conductivity. However, during recycling, to ensure sufficient metallurgical efficiency, it must be crushed before metallurgical processing. After crushing, the iron in the mixed scrap is unevenly distributed during transportation.

[0004] After the scrap is crushed, a reducing agent (such as aluminum or silicon) is added to reduce the neodymium oxide to metallic neodymium at high temperatures. Therefore, the amount of reducing agent added must be appropriate. However, the iron content in rare earth NdFeB scrap is unstable. If the reducing agent is always mixed in equal amounts, excess reducing agent will be wasted in cases with a high iron content, while in cases with a low iron content, the neodymium reduction during the metallurgical process will be insufficient. Therefore, a rare earth NdFeB scrap recovery device and process are proposed. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a rare earth neodymium iron boron waste recovery device and process.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a rare earth neodymium iron boron waste recovery device, comprising a metallurgical furnace and a feed port arranged on the metallurgical furnace, a flat bucket is arranged above the feed port, a water shell is arranged behind the flat bucket, an outer shell is extended from the front end of the water shell, the outer shell passes through the interior of the flat bucket, the front end face of the outer shell is coplanar with the inner rear end face of the flat bucket, a magnetic plate is inlaid inside the outer shell, the front end face of the magnetic plate is coplanar with the front end face of the outer shell, the upper end of the water shell is fixedly connected to a water outlet pipe, the lower end of the water shell is fixedly connected to a water inlet pipe, a flow control pendulum is arranged inside the water shell, a door guide is inlaid inside the flat bucket, the rear end face of the door guide is provided with a notch, a scraper is arranged inside the notch, the scraper is attached to the inner rear end of the flat bucket, the lower end of the scraper is extended with a V-shaped angle, and the scraper is connected to the flow control pendulum.

[0007] Preferably, the lower parts of both sides of the flat bucket are symmetrically inlaid with row grooves, the row grooves are arranged at an angle, one end of the row groove extends into the interior of the flat bucket, and one end of the row groove is located below the door guide frame.

[0008] Preferably, a vertical frame is fixedly installed at the front end of the metallurgical furnace, a boss is fixedly installed at the upper end of the vertical frame, a shell frame is embedded through the end of the boss, the end of the shell frame is fixed to the water shell, a bucket frame extends from the middle of the flat bucket, and the end of the bucket frame is fixed to the shell frame.

[0009] Preferably, the flow control pendulum includes a main piston slidably mounted inside the water shell, and control plates are slidably mounted at the upper and lower edges of the inner part of the water shell. The two control plates are respectively fitted to the upper and lower ends of the main piston, and the two control plates are staggered. The through hole at one end of the lower control plate is aligned with one end of the water inlet pipe, and the through hole at the other end of the upper control plate is aligned with one end of the water outlet pipe. Both sides of the water shell are fixedly connected with convex shells, and a synchronization rod is embedded in the middle of the main piston. The synchronization rod passes through the end of the convex shell and is connected to the scraper.

[0010] Preferably, a secondary piston is coaxially mounted on the outer surface of the synchronization rod, and the secondary piston is slidably mounted inside the convex shell. A magnet is embedded in the upper edge of the convex shell, and L-shaped frames extend from both ends of the synchronization rod. One of the L-shaped frames is attracted to the magnet on one of the convex shells, and a top cap is embedded through the end of the L-shaped frame.

[0011] Preferably, a connecting shaft extends from the middle of the rear end of the water shell, and a central gear is coaxially mounted on the outer surface of the connecting shaft. The upper part of the central gear is engaged with an upper gear plate, and the lower part of the central gear is engaged with a lower gear plate. Connecting frames are fixedly mounted on opposite ends of the lower gear plate and the upper gear plate, and the two connecting frames are respectively connected to two control plates. A control rod is fixedly mounted on the rear end of the upper connecting frame, and a top cap on one of the L-shaped frames is placed on one end of the control rod.

[0012] Preferably, a sliding sleeve is slidably mounted on the outer surface of the connecting frame, and the sliding sleeve is fixed to the water shell. Protruding columns are fixedly mounted on the opposite ends of the two control panels, and the protruding columns extend through the side of the water shell. The ends of the two connecting frames are respectively fixed to the two protruding columns.

[0013] Preferably, two push pieces are symmetrically fixedly installed on the side of the scraper strip, and the push pieces extend through the side of the flat bucket. The ends of the two push pieces are connected to a piece frame, and the ends of the piece frame are fixed to the synchronization rod.

[0014] A rare earth NdFeB waste recycling process is also proposed, which is carried out using the above-mentioned device and includes the following steps: S1. A small amount of crushed rare earth NdFeB waste particles is continuously added into the feed port through a screw feeder; S2. When the waste enters, the magnetic plate in the flat bucket will absorb the metallic iron mixed in the rare earth NdFeB waste particles passing through to separate them; S3. The waste material then enters a metallurgical furnace for high-temperature sintering, and reacts stably with the reducing agent that is continuously and quantitatively fed in, ultimately obtaining alloy neodymium material.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the crushed rare earth NdFeB waste particles are continuously fed into the feed port in small quantities, they will first pass through the flat bucket and fall into the feed port. At this time, the magnetic plate in the flat bucket will adsorb the metallic iron material mixed in the rare earth NdFeB waste particles passing through to collect it, so as to ensure the proportion of neodymium oxide in the rare earth NdFeB waste, and then ensure a stable reaction with the reducing agent that is continuously and quantitatively fed. At the same time, when high-temperature firing is carried out, external cold water can be introduced into the water shell through the water inlet pipe and discharged through the water outlet pipe, so as to circulate and cool the magnetic plate on the water shell, so that the magnetic plate works in a low-temperature environment to avoid high-temperature demagnetization.

[0016] 2. When cold water enters the water shell from one end of the water inlet pipe, it will push the main piston from one side of the main piston, causing the main piston to move sideways. At this time, the cold water on the other side of the main piston will be discharged from one end of the water outlet pipe. At the same time, the top cap on one side will gradually separate from one end of the control rod, and the L-shaped frame on one side will gradually separate from the magnet on one side. When the main piston is about to move sideways to the end point, the top cap on the other side will contact and push the other end of the control rod, causing the upper and lower gear plates to move in opposite directions under the action of the central gear, thereby driving the two control plates to move in opposite directions. When the control plate moves halfway, the L-shaped frame on the other side will be attracted by the magnet close to the other side, causing it to move toward the magnet, thereby driving the top cap to continue pushing the other end of the control rod. , so that the control panel moves to the end of the stroke. At this time, the lower control panel blocks one end of the water inlet pipe and opens the other end, and the upper control panel blocks one end of the water outlet pipe and opens the other end. Then cold water enters the water shell from the other end of the water inlet pipe and pushes the main piston from the other side of the main piston to make the main piston move in the opposite direction. At this time, the cold water on the other side of the main piston is discharged from the other end of the water outlet pipe. In this way, the cycle is repeated, and the scraper is driven by the main piston that swings back and forth to continuously slide left and right to push the metal iron material adsorbed on the magnetic plate toward both sides of the magnetic plate, so that it is separated from the magnetic plate, loses the magnetic effect of the magnetic plate and falls into the discharge groove under its own weight and is discharged. In this way, the iron scraps adsorbed on the magnetic plate are cleaned and discharged by themselves, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic structural diagram of a rare earth NdFeB waste recovery device according to the present invention; Figure 2 This is a schematic diagram of the flat bucket of a rare earth NdFeB waste recovery device of the present invention; Figure 3 A longitudinal cross-sectional view of a flat bucket of a rare earth NdFeB waste recovery device according to the present invention; Figure 4 This is a transverse cross-sectional view of a flat bucket of a rare earth NdFeB waste recovery device according to the present invention; Figure 5 This is a position view of the door guide frame and scraper strip of a rare earth NdFeB waste recovery device of the present invention; Figure 6 This is a rear view of a water shell of a rare earth NdFeB waste recovery device according to the present invention; Figure 7 This is an internal view of a water shell of a rare earth NdFeB waste recovery device according to the present invention; Figure 8 The present invention is a rare earth neodymium iron boron waste recovery device Figure 1 A magnified view of center.

[0018] In the figure: 1. metallurgical furnace; 2. vertical frame; 3. shell frame; 4. row slot; 5. bucket frame; 6. feed port; 7. flat bucket; 8. water outlet pipe; 9. water shell; 10. water inlet pipe; 11. push plate; 12. plate frame; 13. synchronization rod; 14. door guide frame; 15. magnetic plate; 16. shell; 17. convex seat; 18. main piston; 19. control board; 20. L-shaped frame; 21. extension column; 22. magnet; 23. auxiliary piston; 24. convex shell; 25. top cap; 26. scraper; 27. missing groove; 28. V-shaped angle; 29. ​​connecting shaft; 30. central gear; 31. lower gear plate; 32. upper gear plate; 33. control rod; 34. sliding sleeve; 35. connecting frame. DETAILED DESCRIPTION

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0020] like Figures 1-8A rare earth NdFeB waste recycling device shown in the figure includes a metallurgical furnace 1 and a feed port 6 arranged on the metallurgical furnace 1. It is an existing technology to perform high-temperature metallurgy on rare earth NdFeB waste through the metallurgical furnace 1. A reducing agent feed port is provided on the upper surface of the metallurgical furnace 1 for continuously adding reducing agents such as aluminum and silicon. It has been widely used, so it is not described in detail here. A flat bucket 7 is provided above the feed port 6. The flat design of the flat bucket 7 can ensure that the rare earth NdFeB waste particles can approach the magnetic plate 15 when passing through the flat bucket 7. A water shell 9 is provided at the rear of the flat bucket 7. The front of the water shell 9 The end is extended with a shell 16, which passes through the interior of the flat bucket 7. The front end surface of the shell 16 is coplanar with the rear end surface of the interior of the flat bucket 7. The interior of the shell 16 is inlaid with a magnetic plate 15, and the shell 16 plays a role in carrying the magnetic plate 15. The front end surface of the magnetic plate 15 is coplanar with the front end surface of the shell 16, which can facilitate the scraper 26 to slide left and right continuously to push the metal iron material adsorbed on the magnetic plate 15 toward the two sides of the magnetic plate 15, so that it is separated from the magnetic plate 15, so as to lose the magnetic effect of the magnetic plate 15 and fall into the discharge groove 4 under its own weight and be discharged. The upper end of the water shell 9 is fixedly connected to the water outlet pipe 8. The water shell The lower end of 9 is fixedly connected with a water inlet pipe 10, and the water outlet pipe 8 and the water inlet pipe 10 are connected with the external cold water facility for circulation. Because cooling the cold water and pressurizing the cold water to drive it to flow are both existing technologies and have been widely used, they are not elaborated on here and are not shown in the figure. The interior of the water shell 9 is provided with a flow control ornament, and the interior of the flat bucket 7 is inlaid with a door guide 14. The rear end surface of the door guide 14 is provided with a notch 27. The door guide 14 can guide the rare earth NdFeB waste particles passing through the flat bucket 7, on the one hand, to avoid the rare earth NdFeB waste The material particles fall into the discharge groove 4 when passing through. On the other hand, the rare earth NdFeB waste particles will not stick to the magnetic plate 15 when passing through, so that the subsequent scraper 26 will not push the rare earth NdFeB waste particles that pass through when pushing the metal iron material on the magnetic plate 15 down. The scraper 26 is arranged inside the groove 27, and the groove 27 serves to accommodate the scraper 26. The scraper 26 is attached to the inner rear end of the flat bucket 7. The lower end of the scraper 26 is extended with a V-shaped angle 28. The V-shaped angle 28 can guide the fallen metal iron material to facilitate entering the discharge groove 4. The scraper 26 is connected to the flow control ornament.

[0021] The lower parts of both sides of the flat bucket 7 are symmetrically inlaid with row grooves 4, which are inclined. The row grooves 4 serve to receive and discharge the fallen metal iron materials. One end of the row groove 4 extends into the interior of the flat bucket 7, and one end of the row groove 4 is located below the door guide frame 14.

[0022] A stand 2 is fixedly mounted on the front end of the metallurgical furnace 1, and a boss 17 is fixedly mounted on the upper end of the stand 2. The stand 2 supports the boss 17. The end of the boss 17 is penetrated and inlaid with a shell frame 3. The boss 17 fixes the shell frame 3. The end of the shell frame 3 is fixed to the water shell 9. A bucket frame 5 extends from the middle of the flat bucket 7. The end of the bucket frame 5 is fixed to the shell frame 3. The shell frame 3 and the bucket frame 5 fix the water shell 9 and the flat bucket 7.

[0023] The flow control pendulum includes a main piston 18 slidably installed inside the water shell 9. The main piston 18 is pushed by cold water. Control plates 19 are slidably installed at the upper and lower edges of the interior of the water shell 9. The two control plates 19 are respectively fitted to the upper and lower ends of the main piston 18. The two control plates 19 are staggered. The through hole at one end of the lower control plate 19 is aligned with one end of the water inlet pipe 10. The control plate 19 controls the opening and closing positions of the water inlet pipe 10 and the water outlet pipe 8. The through hole at the other end of the upper control plate 19 is aligned with one end of the water outlet pipe 8. Both sides of the water shell 9 are fixedly connected with a convex shell 24. The middle of the main piston 18 is inlaid with a synchronization rod 13. The convex shell 24 adapts to the synchronization rod 13. The synchronization rod 13 passes through the end of the convex shell 24 and is connected to the scraper 26.

[0024] A secondary piston 23 is coaxially mounted on the outer surface of the synchronization rod 13, and the secondary piston 23 is slidably mounted inside the convex shell 24. The secondary piston 23 serves to allow the synchronization rod 13 to slide in the convex shell 24. A magnet 22 is inlaid at the upper edge of the convex shell 24. L-shaped frames 20 are extended from both ends of the synchronization rod 13. One of the L-shaped frames 20 is attracted to the magnet 22 on one of the convex shells 24. The magnet 22 can generate an attractive force on the L-shaped frame 20 when the control board 19 moves halfway, so that the L-shaped frame 20 can continue to move, allowing the control board 19 to move to the end of the stroke. A top cap 25 is inlaid through the end of the L-shaped frame 20.

[0025] A connecting shaft 29 extends from the middle part of the rear end of the water shell 9, and a central gear 30 is coaxially mounted on the outer surface of the connecting shaft 29. The connecting shaft 29 plays a role in carrying the central gear 30. The upper part of the central gear 30 is meshed with an upper gear plate 32, and the lower part of the central gear 30 is meshed with a lower gear plate 31. The central gear 30 plays a role in allowing the upper gear plate 32 and the lower gear plate 31 to move in opposite directions. The opposite ends of the lower gear plate 31 and the upper gear plate 32 are fixedly mounted with a connecting frame 35. The two connecting frames 35 are respectively connected to the two control plates 19. The connecting frame 35 plays a connecting role. The rear end of the upper connecting frame 35 is fixedly mounted with a control rod 33, and the top cap 25 on one of the L-shaped frames 20 is pressed against one end of the control rod 33. The control rod 33 can be pushed by the top cap 25 to move.

[0026] A sliding sleeve 34 is slidably mounted on the outer surface of the connecting frame 35. The sliding sleeve 34 is fixed to the water shell 9. The sliding sleeve 34 serves to guide the connecting frame 35. The opposite ends of the two control panels 19 are fixedly mounted with protruding columns 21. The protruding columns 21 extend through the side of the water shell 9. The protruding columns 21 serve to connect the control panel 19 and the connecting frame 35. The ends of the two connecting frames 35 are respectively fixed to the two protruding columns 21.

[0027] Two push pieces 11 are symmetrically fixedly installed on the side of the scraper bar 26. The push pieces 11 pass through the side of the flat bucket 7. The push pieces 11 play the role of pushing the scraper bar 26. The ends of the two push pieces 11 are connected to the sheet frame 12. The end of the sheet frame 12 is fixed to the synchronization rod 13. The sheet frame 12 plays the role of fixing the push pieces 11 and the synchronization rod 13 together.

[0028] A rare earth NdFeB waste recycling process, using the above-mentioned device, comprises the following steps: S1, a small amount of crushed rare earth NdFeB waste particles is continuously added into the feed port 6 through a screw feeder; S2. When the waste enters, the magnetic plate 15 in the flat bucket 7 will absorb the metallic iron mixed in the rare earth NdFeB waste particles passing through to separate them; S3. The waste material then enters the metallurgical furnace 1 for high-temperature sintering, and reacts stably with the reducing agent that is continuously and quantitatively fed in, and finally obtains the alloy neodymium material.

[0029] Specifically, during metallurgy, the spiral feeder will continuously add a small amount of crushed rare earth NdFeB waste particles into the feed port 6, so that it can enter the metallurgical furnace 1 for high-temperature firing. During this process, the rare earth NdFeB waste particles will first pass through the flat bucket 7 and fall into the feed port 6. At this time, the magnetic plate 15 in the flat bucket 7 will adsorb the metallic iron material mixed in the rare earth NdFeB waste particles passing through to separate it, so as to increase the content of neodymium oxide in the rare earth NdFeB waste, thereby ensuring a stable reaction with the reducing agent that is continuously and quantitatively fed in. At the same time, during high-temperature firing, external cold water can be introduced into the water shell 9 through the water inlet pipe 10. , and discharged through the water outlet pipe 8, so as to circulate, in order to cool the magnetic plate 15 on the water shell 9, so that the magnetic plate 15 works in a low temperature environment to avoid the phenomenon of high temperature demagnetization. When the cold water enters the water shell 9 from one end of the water inlet pipe 10, it will push the main piston 18 from one side of the main piston 18, so that the main piston 18 moves sideways. At this time, the cold water on the other side of the main piston 18 will be discharged from one end of the water outlet pipe 8. At the same time, the top cap 25 on one side will gradually separate from one end of the control rod 33, and the L-shaped frame 20 on one side will gradually separate from the magnet 22 on one side. When the main piston 18 is about to move sideways to the end point, the top cap on the other side will gradually separate from the magnet 22 on one side. The cap 25 will contact the other end of the control rod 33 and push it, causing the upper gear plate 32 and the lower gear plate 31 to move in opposite directions under the action of the central gear 30, thereby driving the two control plates 19 to move in opposite directions. When the control plate 19 moves halfway, the L-shaped frame 20 on the other side will be attracted by the magnet 22 close to the other side, causing it to move toward the magnet 22, thereby driving the top cap 25 to continue pushing the other end of the control rod 33, causing the control plate 19 to move to the end of the stroke. At this time, the lower control plate 19 blocks one end of the water inlet pipe 10 and opens the other end, and the upper control plate 19 blocks one end of the water outlet pipe 8 and opens the other end. The end is opened, and then cold water enters the water shell 9 from the other end of the water inlet pipe 10, and pushes the main piston 18 from the other side of the main piston 18, causing the main piston 18 to move in the opposite direction. At this time, the cold water on the other side of the main piston 18 is discharged from the other end of the water outlet pipe 8, and the cycle is repeated. Driven by the main piston 18 that is constantly swinging back and forth, the scraper 26 is driven to slide continuously left and right, so as to push the metal iron materials adsorbed on the magnetic plate 15 toward the two sides of the magnetic plate 15, so that it is separated from the magnetic plate 15, so that it loses the magnetic effect of the magnetic plate 15 and falls into the discharge groove 4 under its own weight and is discharged, thereby automatically cleaning and discharging the iron scraps adsorbed on the magnetic plate 15.

[0030] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rare earth neodymium iron boron waste recovery device, comprising a metallurgical furnace (1) and a feed port (6) arranged on the metallurgical furnace (1), characterized in that: A flat bucket (7) is provided above the feed port (6), a water shell (9) is provided behind the flat bucket (7), a shell (16) is extended from the front end of the water shell (9), the shell (16) passes through the interior of the flat bucket (7), the front end surface of the shell (16) is coplanar with the rear end surface of the interior of the flat bucket (7), a magnetic plate (15) is embedded in the interior of the shell (16), the front end surface of the magnetic plate (15) is coplanar with the front end surface of the shell (16), and the upper end of the water shell (9) is fixedly connected to a water outlet pipe ( 8), the lower end of the water shell (9) is fixedly connected to the water inlet pipe (10), the interior of the water shell (9) is provided with a flow control pendant, the interior of the flat bucket (7) is inlaid with a door guide frame (14), the rear end surface of the door guide frame (14) is provided with a notch (27), the interior of the notch (27) is provided with a scraper (26), the scraper (26) is fitted to the rear end of the interior of the flat bucket (7), the lower end of the scraper (26) extends with a V-shaped angle (28), and the scraper (26) is connected to the flow control pendant.

2. A rare earth neodymium iron boron waste recovery device according to claim 1, characterized in that: The lower parts of both sides of the flat bucket (7) are symmetrically inlaid with row grooves (4), and the row grooves (4) are arranged at an angle. One end of the row groove (4) extends into the interior of the flat bucket (7), and one end of the row groove (4) is located below the door guide frame (14).

3. The rare earth NdFeB waste recovery device according to claim 1, characterized in that: A vertical frame (2) is fixedly mounted on the front end of the metallurgical furnace (1), a convex seat (17) is fixedly mounted on the upper end of the vertical frame (2), a shell frame (3) is embedded through the end of the convex seat (17), the end of the shell frame (3) is fixed to the water shell (9), a bucket frame (5) extends from the middle of the flat bucket (7), and the end of the bucket frame (5) is fixed to the shell frame (3).

4. The rare earth NdFeB waste recovery device according to claim 1, characterized in that: The flow control pendulum comprises a main piston (18) slidably mounted inside the water shell (9), and control plates (19) are slidably mounted on the upper and lower edges of the inner portion of the water shell (9), and the two control plates (19) are respectively fitted to the upper and lower ends of the main piston (18). The two control plates (19) are staggered, and the through hole at one end of the lower control plate (19) is aligned with one end of the water inlet pipe (10), and the through hole at the other end of the upper control plate (19) is aligned with one end of the water outlet pipe (8). Both sides of the water shell (9) are fixedly connected with a convex shell (24), and a synchronization rod (13) is embedded in the middle of the main piston (18), and the synchronization rod (13) passes through the end of the convex shell (24). The synchronization rod (13) is connected to the scraper (26).

5. A rare earth NdFeB waste recovery device according to claim 4, characterized in that: A secondary piston (23) is coaxially mounted on the outer surface of the synchronization rod (13), and the secondary piston (23) is slidably mounted inside a convex shell (24). A magnet (22) is embedded at the upper edge of the convex shell (24). L-shaped frames (20) extend from both ends of the synchronization rod (13), one of the L-shaped frames (20) is attracted to the magnet (22) on one of the convex shells (24), and a top cap (25) is embedded through the end of the L-shaped frame (20).

6. The rare earth NdFeB waste recovery device according to claim 5, characterized in that: A connecting shaft (29) extends from the middle of the rear end of the water shell (9), and a central gear (30) is coaxially mounted on the outer surface of the connecting shaft (29). An upper tooth plate (32) is meshed with the upper portion of the central gear (30), and a lower tooth plate (31) is meshed with the lower portion of the central gear (30). Connecting frames (35) are fixedly mounted on opposite ends of the lower tooth plate (31) and the upper tooth plate (32). The two connecting frames (35) are respectively connected to the two control plates (19). A control rod (33) is fixedly mounted on the rear end of the upper connecting frame (35), and a top cap (25) on one of the L-shaped frames (20) is placed on one end of the control rod (33).

7. A rare earth NdFeB waste recovery device according to claim 6, characterized in that: A sliding sleeve (34) is slidably mounted on the outer surface of the connecting frame (35), and the sliding sleeve (34) is fixed to the water shell (9). Opposite ends of the two control panels (19) are fixedly mounted with protruding columns (21), and the protruding columns (21) extend through the side of the water shell (9). The ends of the two connecting frames (35) are respectively fixed to the two protruding columns (21).

8. The rare earth NdFeB waste recovery device according to claim 4, characterized in that: Two push pieces (11) are symmetrically fixedly installed on the side of the scraper (26), and the push pieces (11) extend through the side of the flat bucket (7). The ends of the two push pieces (11) are connected to a sheet frame (12), and the ends of the sheet frame (12) are fixed to a synchronization rod (13).

9. A rare earth neodymium iron boron waste recovery process, using the device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, continuously adding a small amount of crushed rare earth NdFeB waste particles into the feed port (6) through a screw feeder; S2. When the waste enters, the magnetic plate (15) in the flat bucket (7) will absorb the metallic iron material mixed in the rare earth NdFeB waste particles passing through to separate them; S3. The waste material is then placed in a metallurgical furnace (1) for high-temperature sintering, and reacts stably with a reducing agent that is continuously and quantitatively fed in, ultimately obtaining a neodymium alloy material.

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