Neodymium iron boron waste recycling device with crushing mechanism

Abstract

The application discloses a kind of neodymium iron boron waste recovery device in broken material mechanism, including crushing device, the crushing device is mainly divided into washing mechanism and crushing mechanism two parts, and washing mechanism carries out the washing operation of neodymium iron boron magnet waste, the crushing mechanism carries out the crushing treatment of neodymium iron boron magnet waste, the outer circumferential side of the crushing device is equipped with screening mechanism, and screening mechanism carries out the screening treatment of neodymium iron boron magnet waste particle.This improved neodymium iron boron waste recovery device in broken material mechanism, can complete the washing, crushing and screening operation of neodymium iron boron waste in one device, device structure is simple, convenient operation, reduce the working strength of operator, and the neodymium iron boron waste after processing will not produce larger volume difference, facilitate the magnetic separation of neodymium iron boron waste subsequent, device can continue to carry out internal part cooling operation when using, prolong the service life of device.

Description

TECHNICAL FIELD

[0001] The present application relates to a neodymium iron boron waste crushing mechanism, in particular to a crushing mechanism in a neodymium iron boron waste recycling device. BACKGROUND

[0002] Neodymium magnet is also called neodymium iron boron magnet, which is a tetragonal crystal formed by neodymium, iron and boron. The magnetic energy product of such magnet is greater than that of samarium cobalt magnet, and it is the largest material in the world at that time. In the process of production and use of neodymium iron boron magnet, neodymium iron boron magnet waste is generally used for recycling and remanufacturing to reduce the waste of rare earth materials. The recycling and remanufacturing process of neodymium iron boron magnet waste generally includes waste crushing, magnetic separation, pickling, dissolution, extraction and other processes.

[0003] Before crushing the neodymium iron boron magnet, a certain amount of dust and impurities may be attached to the recycled neodymium iron boron magnet. Therefore, the neodymium iron boron magnet needs to be cleaned before being crushed. The existing crushing of neodymium iron boron magnet waste is generally to directly put the neodymium iron boron magnet waste into a universal crusher for crushing operation. The cleaning and crushing operations of the neodymium iron boron magnet waste are usually carried out by two different devices, and the intermediate up and down feeding operations of the neodymium iron boron magnet waste need to be reciprocated. In addition, the transportation of the neodymium iron boron magnet waste is also needed, which is very troublesome. Moreover, the size difference of the crushed neodymium iron boron magnet particles may be too large, which may affect the subsequent magnetic separation of the neodymium iron boron magnet waste. SUMMARY

[0004] The present application aims to provide a crushing mechanism in a neodymium iron boron waste recycling device to solve the problems mentioned in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a crushing mechanism in a neodymium iron boron waste recycling device, comprising a crushing device, which is mainly divided into a cleaning mechanism and a crushing mechanism. The cleaning mechanism performs cleaning operation of the neodymium iron boron magnet waste. The crushing mechanism performs crushing operation of the neodymium iron boron magnet waste. A screening mechanism is arranged on the outer periphery of the crushing device, and the screening mechanism performs screening operation of the neodymium iron boron magnet waste particles.

[0006] Preferably, the cleaning mechanism comprises a water storage cylinder, a rotating shaft is rotatably arranged at the center of the end of the water storage cylinder through a bearing, a drive is fixedly arranged at the bottom end of the water storage cylinder, the bottom end of the rotating shaft is fixedly connected with the output end of the drive, and a plurality of lever rods are fixedly arranged on the outer periphery of the rotating shaft in a circumferential array.

[0007] By adopting the technical scheme, the driver, the rotating shaft and the stirring rod are arranged to stir the Nd-Fe-B magnet waste in water, so that the Nd-Fe-B magnet waste can be fully washed by water flow, and the washing effect of the Nd-Fe-B magnet waste is enhanced.

[0008] Preferably, the crushing mechanism comprises a mesh plate, the mesh plate is arranged at the center of the top opening of the water storage cylinder, and the top end of the rotating shaft is connected to the bottom side of the mesh plate.

[0009] By adopting the technical scheme, the mesh plate is arranged to block the large pieces of Nd-Fe-B magnet waste from entering the conduit, so that the Nd-Fe-B magnet waste can be fully crushed.

[0010] Preferably, the cross section of the stirring rod is triangular, the top side of the top end of the stirring rod is connected to the bottom side of the mesh plate, the bottom side of the bottom end of the stirring rod is connected to the inner bottom wall of the water storage cylinder, a plurality of limiting rods are fixedly arranged on the inner wall of the water storage cylinder in a circumferential array, and each limiting rod is located at the middle position between the corresponding two stirring rods.

[0011] By adopting the technical scheme, the cross section of the stirring rod is triangular, the outer circumferential wall of the stirring rod forms a ridge line, the stirring rod is more easily crushed, the Nd-Fe-B magnet waste rebounds towards the cutter when colliding with the stirring rod, the Nd-Fe-B magnet waste is crushed, the stirring rod in contact with the bottom side of the mesh plate and the inner bottom wall of the water storage cylinder avoids the deposition or adhesion of the Nd-Fe-B magnet waste on the bottom side of the mesh plate and the inner bottom wall of the water storage cylinder.

[0012] Preferably, the plurality of stirring rods are divided into two groups and oppositely arranged in the water storage cylinder, a plurality of cutters are fixedly arranged on the outer circumferential side of the rotating shaft in a circumferential array, each cutter is located at the middle position between the two groups of stirring rods, and the cutters are arranged obliquely.

[0013] By adopting the technical scheme, the obliquely arranged cutters push the water in the water storage cylinder upwards during the crushing process, accelerate the upward flow of the water in the water storage cylinder, and make the water more easily push the small Nd-Fe-B magnet waste upwards.

[0014] Preferably, the screening mechanism comprises a lower cylinder, the lower cylinder is fixedly arranged on the outer circumferential wall of the water storage cylinder by bolts, a upper cylinder is threadedly sleeved on the top end of the lower cylinder, a filter cylinder is fixedly arranged at the center position of the inner bottom wall of the lower cylinder, the top side of the filter cylinder is arranged as an arc surface, a filter plate is slidably sleeved on the top end of the filter cylinder, and the outer circumferential wall of the filter plate is connected to the inner wall of the opening of the lower cylinder.

[0015] By adopting the technical scheme, the filter cylinder and the filter plate are arranged, so that the neodymium iron boron magnet waste particles can be subjected to secondary screening, and the neodymium iron boron magnet waste powder can be screened out from the neodymium iron boron magnet waste, thereby facilitating the taking of the neodymium iron boron magnet waste particles.

[0016] Preferably, the top side of the filter plate is provided with a plurality of limiting blocks in a circumferential array, and each limiting block is fixedly connected with the inner wall of the bottom end opening of the upper cylinder.

[0017] By adopting the technical scheme, the limiting blocks and the mesh cylinder are arranged, so that the filter plate is clamped and fixed after the lower cylinder and the upper cylinder are assembled, without the need for other operations by the operator, thereby facilitating the use of the device.

[0018] Preferably, the top end opening of the water storage cylinder is provided with a cylinder cover with internal threads, and the outer peripheral wall of the mesh plate is fixedly connected with the inner wall of the bottom end opening of the cylinder cover, the top of the cylinder cover is provided in a hemispherical shell shape, a conduit is fixedly provided at the center position of the top end of the cylinder cover, and the water outlet end of the conduit is inserted into the upper cylinder and fixedly connected with the cylinder wall of the upper cylinder.

[0019] By adopting the technical scheme, the arrangement of the cylinder cover can prevent the water in the water storage cylinder from splashing out, and the hemispherical shell-shaped cylinder cover can accelerate the speed of the water flow entering the conduit, thereby enhancing the adhesion and pushing of the water flow to the neodymium iron boron magnet waste particles.

[0020] Preferably, a water pump is fixedly arranged at the center position of the bottom end of the lower cylinder, the water inlet end of the water pump is inserted into the filter cylinder and fixedly connected with the cylinder wall of the lower cylinder, a ring pipe is fixedly sleeved at the outer peripheral side of the bottom end of the water storage cylinder, the inside of the ring pipe is connected with the inside of the water storage cylinder through a plurality of one-way valves, and the water outlet end of the water pump is connected with a connecting pipe, and the water outlet end of the connecting pipe is inserted into the ring pipe and fixedly connected with the pipe wall of the ring pipe.

[0021] By adopting the technical scheme, the ring pipe and the one-way valve are arranged, so that water can be injected into the water storage cylinder from multiple positions at the bottom of the water storage cylinder at the same time, thereby enabling the water flow to wash more neodymium iron boron magnet waste.

[0022] Compared with the prior art, the improved neodymium iron boron waste recovery device has the following beneficial effects: the crushing mechanism in the improved neodymium iron boron waste recovery device can complete the washing, crushing and screening operations of the neodymium iron boron waste in one device, the device structure is simple, the operation is convenient, the working strength of the operator is reduced, the processed neodymium iron boron waste does not have a large volume difference, the subsequent magnetic separation of the neodymium iron boron waste is facilitated, the device can continuously perform internal part cooling operation during use, and the service life of the device is prolonged.

[0023] The application is provided with a cleaning mechanism, a crushing mechanism and a screening mechanism. When the neodymium iron boron waste is crushed, the cleaning mechanism can complete the cleaning operation of the neodymium iron boron waste. The neodymium iron boron waste is washed by the water flow through the cooperation of the cleaning mechanism and the screening mechanism, so as to enhance the cleaning effect of the neodymium iron boron waste, collect dust and impurities to a specific position for storage, complete the crushing treatment of the neodymium iron boron waste through the cooperation of the cleaning mechanism and the crushing mechanism, and simultaneously cool the internal components when the neodymium iron boron waste is crushed, so as to reduce the loss of the internal components. Through the cooperation of the cleaning mechanism, the crushing mechanism and the screening mechanism, the neodymium iron boron waste particles can be taken out from the crushing mechanism in time when the cleaning mechanism and the crushing mechanism are crushing, and the neodymium iron boron waste particles and the neodymium iron boron waste powder can be screened. The cleaning, crushing and screening of the neodymium iron boron waste are simultaneously performed in the same device, so that the operator's working strength is reduced, and the processed neodymium iron boron waste has no large volume difference, which facilitates the subsequent magnetic separation of the neodymium iron boron waste. The device has simple structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole schematic view of the application;

[0025] Figure 2 It is a schematic view of the internal structure of the water storage cylinder of the application;

[0026] Figure 3 It is a schematic view of the internal structure of the lower cylinder of the application;

[0027] Figure 4 It is a whole schematic view of the application Figure 3 It is an enlarged structure schematic view of position A in the application;

[0028] Figure 5 It is an enlarged structure schematic view of position B in the application Figure 3 It is an enlarged structure schematic view of position B in the application

[0029] Figure 6 It is a schematic view of the internal structure of the upper cylinder of the application;

[0030] Figure 7 It is a whole structure schematic view of the application.

[0031] In the figure: 1, crushing device; 2, cleaning mechanism; 21, water storage cylinder; 22, rotating shaft; 23, driver; 24, push rod; 3, crushing mechanism; 31, screen plate; 32, limiting rod; 33, cutter; 4, screening mechanism; 41, lower cylinder; 42, upper cylinder; 43, filter cylinder; 44, filter plate; 45, limiting block; 46, cylinder cover; 47, conduit; 48, water pump; 49, ring pipe; 410, one-way valve; 411, connecting pipe. DETAILED DESCRIPTION

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1 , Figure 2 , Figure 3 and Figure 7 The present invention provides a technical solution: a crushing mechanism in a neodymium iron boron waste recycling device, including a crushing device 1. The crushing device 1 is mainly divided into two parts: a cleaning mechanism 2 and a crushing mechanism 3. The cleaning mechanism 2 performs the cleaning operation of neodymium iron boron magnet waste. The cleaning mechanism 2 includes a water storage tank 21. A water supply pipe is fixedly installed on the outer periphery of the lower tank 41, away from the lower tank 41. The water inlet of the water supply pipe is connected to an external water supply device. A rotating shaft 22 is rotatably installed at the center of the end of the water storage tank 21 via a bearing. A sealing ring is fitted on the outer periphery of the part of the rotating shaft 22 located inside the shell wall of the water storage tank 21 to seal the gap between the rotating shaft 22 and the shell wall of the water storage tank 21. A driver 23 is fixedly installed at the bottom end of the water storage tank 21. The bottom end of the rotating shaft 22 is fixedly connected to the output end of the driver 23. The driver 23 is mainly composed of several transmission gears, a housing, and a motor. The several transmission gears amplify the driving force of the motor on the rotating shaft 22. Several levers 24 are fixedly installed in a circular array on the outer periphery of the rotating shaft 22. The levers 24 are made of high-hardness materials that do not attract magnets, such as artificial diamonds or high-hardness aluminum alloys. The arrangement of the driver 23, the rotating shaft 22 and the lever 24 allows for the stirring of neodymium iron boron magnet waste in water, ensuring that the neodymium iron boron magnet waste is thoroughly flushed by the water flow.

[0034] according to Figure 2 and Figure 7As shown, the crushing mechanism 3 crushes NdFeB magnet waste. The crushing mechanism 3 includes a mesh plate 31, which is inserted into the center of the top opening of the water storage tank 21. The mesh plate 31 prevents large pieces of NdFeB magnet waste from flowing out of the water storage tank 21. The top of the rotating shaft 22 connects to the bottom side of the mesh plate 31. The lever 24 has a triangular cross-section and is located at the top side of the lever 24 connecting to the bottom side of the mesh plate 31, and the bottom side of the lever 24 connects to the inner bottom wall of the water storage tank 21. Several limiting rods 32 are fixedly installed in a circumferential array on the inner wall of the water storage tank 21. Each limiting rod 32 is located in the middle between two corresponding levers 24. The limiting rod 32 is made of high-hardness materials such as artificial diamond or high-hardness aluminum alloy that do not attract magnets. The cross-sectional shape of the limiting rod 32 can be hexagonal or heptagonal or other polygonal. Several levers 24 are divided into two groups and are arranged opposite each other in the water storage cylinder 21. Several cutters 33 are fixedly installed in a circular array on the outer periphery of the rotating shaft 22, and each cutter 33 is located in the middle between two groups of levers 24. The cutter 33 is inclined. The mesh plate 31 can prevent larger pieces of NdFeB magnet waste from entering the conduit 47. The lever 24 with a triangular cross-section can form a ridge on its outer peripheral wall, making it easier for the lever 24 to crush the NdFeB magnet waste. At the same time, when the lever 24 collides with the NdFeB magnet waste, the NdFeB magnet waste rebounds towards the cutter 33. The lever 24, which is in contact with the bottom side of the water storage cylinder 21 and the bottom side of the mesh plate 31, can bounce the NdFeB magnet waste blocks upward when it collides with them. The inclined cutter 33 makes the water in the water storage cylinder 21 push upward during the crushing process, accelerating the upward flow of water in the water storage cylinder 21.

[0035] according to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a screening mechanism 4 is provided on the outer periphery of the crushing device 1, and the screening mechanism 4 performs screening of neodymium iron boron magnet waste particles. The screening mechanism 4 includes a lower cylinder 41, which is bolted to the outer peripheral wall of the water storage cylinder 21. An upper cylinder 42 is threaded onto the top of the lower cylinder 41. A valve is fixedly inserted through the top of the upper cylinder 42, located on the outer periphery of the guide tube 47. A filter cylinder 43 is fixedly inserted at the center of the bottom wall of the lower cylinder 41. The top of the filter cylinder 43 is solid, and its top side is arc-shaped. A filter plate 44 is slidably fitted onto the top of the filter cylinder 43. The outer peripheral wall of the filter plate 44 contacts the inner wall of the opening of the lower cylinder 41, and there is a certain friction between the filter plate 44 and the inner wall of the opening of the lower cylinder 41. Several limiting blocks 45 are arranged in a circular array on the top side of the filter plate 44, and each limiting block 45 is fixedly connected to the inner wall of the bottom opening of the upper cylinder 42. A cylinder cover 46 is threaded through the top opening of the water storage cylinder 21, and the outer peripheral wall of the screen plate 31 is connected to the inner wall of the cylinder. The bottom opening of the cover 46 is fixedly connected to the inner wall. The top of the cover 46 is hemispherical. A conduit 47 is fixedly inserted at the center of the top of the cover 46. The outlet end of the conduit 47 is inserted into the upper cylinder 42 and fixedly connected to the cylinder wall of the upper cylinder 42. The conduit 47 can be a rubber tube or a soft plastic tube. A water pump 48 is fixedly installed at the center of the bottom of the lower cylinder 41. The inlet end of the water pump 48 is inserted into the filter cylinder 43 and fixedly connected to the cylinder wall of the lower cylinder 41. A ring pipe 49 is fixedly sleeved on the outer periphery of the bottom of the water storage cylinder 21. The inside of the ring pipe 49 is connected to the inside of the water storage cylinder 21 through several one-way valves 410. A connecting pipe 411 is connected to the drain end of the water pump 48. The drain end of the connecting pipe 411 is inserted into the ring pipe 49 and fixedly connected to the pipe wall of the ring pipe 49. The connecting pipe 411 can be a rubber tube or a soft plastic tube. The filter cylinder 43 and filter plate 44 are configured to perform secondary screening of NdFeB magnet waste particles, thereby screening out NdFeB magnet waste powder. The limiting block 45 and the screen cylinder are configured to automatically clamp and fix the filter plate 44 after the lower cylinder 41 and the upper cylinder 42 are assembled. The cylinder cover 46 is configured to prevent water from splashing out of the water storage cylinder 21, and the hemispherical cylinder cover 46 can accelerate the speed of water flow into the conduit 47. The ring pipe 49 and the one-way valve 410 are configured to allow water to be injected into the water storage cylinder 21 simultaneously from multiple positions at the bottom of the water storage cylinder 21.

[0036] Example 1: When performing the crushing operation of recycling neodymium iron boron magnet waste, first unscrew the cylinder cover 46 from the water storage cylinder 21, then pour an appropriate amount of neodymium iron boron magnet waste into the water storage cylinder 21 and screw the cylinder cover 46 back into the water storage cylinder 21 to reseal the opening of the water storage cylinder 21. Then, an external water injection device injects an appropriate amount of water into the water storage cylinder 21 through a water pipe. The feeding operation of neodymium iron boron magnet waste is completed.

[0037] Then, the driver 23 is started to drive the rotating shaft 22 to slowly rotate and stir the neodymium iron boron magnet waste in the water storage tank 21, thereby cleaning the neodymium iron boron magnet waste with water in the water storage tank 21;

[0038] Example 2: As shown in Example 1, when cleaning NdFeB magnet waste, the water pump 48 is started to quickly pump the water in the filter cylinder 43 into the water storage cylinder 21. At the same time, the excess water in the water storage cylinder 21 is squeezed into the conduit 47 and then guided into the storage cylinder through the conduit 47. After passing through the holes of the filter plate 44 and the filter cylinder 43, it enters the filter cylinder 43 and is re-absorbed by the water pump 48. The water flowing in the water storage cylinder 21 washes the NdFeB magnet waste, enhancing the cleaning effect of the NdFeB magnet waste. When the water flows through the filter cylinder 43, dust and other impurities in the water flow are blocked by the filter cylinder 43 and stored in the lower cylinder 41.

[0039] After the NdFeB magnet waste is cleaned, the lower cylinder 41 is removed from the water storage cylinder 21, and the upper cylinder 42 is unscrewed from the lower cylinder 41. The filter plate 44 is pulled out from the opening of the lower cylinder 41. At this time, the lower cylinder 41 can be inverted to pour out the dust and other impurities inside the lower cylinder 41. After the lower cylinder 41 is cleaned, the upper cylinder 42 is screwed back onto the lower cylinder 41, and the lower cylinder 41 is fixed back onto the water storage cylinder 21. Finally, an appropriate amount of water is added to the water storage cylinder 21 through the external water injection device so that the water flow fills the lower cylinder 41 again.

[0040] It should be noted that when the external water injection device is used for water injection, the valve can be opened to allow the air inside the device to be released normally until water comes out of the valve, then the valve can be closed. At this time, the water fills the lower cylinder 41, the upper cylinder 42 and the water storage cylinder 21.

[0041] Example 3: As shown in Examples 1 and 3, after the NdFeB magnet waste is cleaned, the driver 23 drives the rotating shaft 22 to rotate rapidly. The NdFeB magnet waste is crushed by the mutual collision between the NdFeB magnet waste and the edges of the lever 24 and the limit lever 32. At the same time, the rotation drives the cutter 33 to rotate. While crushing the NdFeB magnet waste, the water in the water storage tank 21 is pushed upward, accelerating the upward flow of the water in the water storage tank 21. At the same time, when the crushing mechanism is crushing the NdFeB magnet waste, the water in the water storage tank 21 is stirred, which washes the NdFeB magnet waste to a certain extent.

[0042] It should be noted that when crushing NdFeB magnet waste, the heat on the lever 24 and the limit lever 32 can be quickly carried away by the water flow to avoid the lever 24 and the limit lever 32 from colliding and rubbing with the NdFeB magnet waste, which would cause the temperature of the lever 24 and the limit lever 32 to rise, thereby causing the lever 24 and the limit lever 32 to wear faster.

[0043] It should be noted that smaller pieces of NdFeB magnet waste move upward with the water flow due to the impact of the water flow. The top lever 24 and limit lever 32 crush the NdFeB magnet waste, thus dispersing and crushing it. Due to the interception of the mesh plate 31, smaller pieces of NdFeB magnet waste will not enter the cylinder cover 46. Subsequently, when the top rotating lever 24 collides with the bottom side of the mesh plate 31, it will knock the smaller pieces of NdFeB magnet waste down again to continue the crushing process. The larger pieces of NdFeB magnet waste at the bottom of the water storage cylinder 21 can be bounced upward due to the collision between the inclined surface of the bottom lever 24 and the NdFeB magnet waste, so that more limit levers 32 can collide with the NdFeB magnet waste.

[0044] Driven by the water flow, appropriately sized NdFeB magnet waste particles pass through the holes of the mesh plate 31 and enter the conduit 47 along with the water flow. They are then guided into the upper cylinder 42 by the conduit 47. Due to the interception of the filter plate 44, the NdFeB magnet waste particles are intercepted and stored in the upper cylinder 42, while the NdFeB magnet waste powder passes through the holes of the filter plate 44 and is stored in the lower cylinder 41 due to the interception of the filter cylinder 43.

[0045] It should be noted that the arc surface on the top side of the filter cylinder 43 causes the neodymium iron boron magnet waste powder to automatically flow towards the filter plate 44 when impacted by water flow.

[0046] Working principle: The NdFeB magnet waste is crushed according to Embodiments 1, 2 and 3. After the NdFeB magnet waste is crushed, the storage device is placed below the lower cylinder 41, and then the upper cylinder 42 is unscrewed from the lower cylinder 41. The NdFeB magnet waste particles in the upper cylinder 42 automatically fall into the storage device. Finally, the lower cylinder 41 is removed, and the filter plate is pulled out from the lower cylinder 41. The NdFeB magnet waste powder in the lower cylinder 41 can be poured into another storage device, which can be a storage box or storage cylinder or other storage equipment.

[0047] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shredding mechanism in a neodymium iron boron scrap recycling device, comprising a crushing device (1), characterized in that: The crushing device (1) is mainly divided into washing mechanism (2) and crushing mechanism (3) two parts, and the washing mechanism (2) carries out the washing operation of neodymium iron boron magnet waste, the crushing mechanism (3) carries out the crushing treatment of neodymium iron boron magnet waste, the outer peripheral side of the crushing device (1) is equipped with screening mechanism (4), and the screening mechanism (4) carries out the screening treatment of neodymium iron boron magnet waste particles; The cleaning mechanism (2) comprises a water storage cylinder (21), a rotating shaft (22) is rotatably arranged at the center of the end of the water storage cylinder (21), and a plurality of stirring rods (24) are fixedly arranged on the outer periphery of the rotating shaft (22) in a circular array; The crushing mechanism (3) comprises a mesh plate (31), which is arranged at the center of the top opening of the water storage cylinder (21); The cross section of the stirring rod (24) is triangular, the top side of the stirring rod (24) at the top is connected to the bottom side of the mesh plate (31), and the bottom side of the stirring rod (24) at the bottom is connected to the inner bottom wall of the water storage cylinder (21); A plurality of stirring rods (24) are arranged in two groups in the water storage cylinder (21), a plurality of cutters (33) are fixedly arranged on the outer periphery of the rotating shaft (22) in a circular array, and each cutter (33) is arranged at the middle position between the two groups of stirring rods (24), and the cutter (33) is inclinedly arranged; The screening mechanism (4) comprises a lower cylinder (41), which is fixedly arranged on the outer peripheral wall of the water storage cylinder (21) by bolts, an upper cylinder (42) is threadedly arranged on the top end of the lower cylinder (41), a filter cylinder (43) is fixedly arranged at the center of the inner bottom wall of the lower cylinder (41), the top side of the filter cylinder (43) is arc-shaped, a filter plate (44) is slidably arranged on the top end of the filter cylinder (43), and the outer peripheral wall of the filter plate (44) is connected to the inner opening wall of the lower cylinder (41); The top side of the filter plate (44) is provided with a plurality of limiting blocks (45) in a circular array, and each limiting block (45) is fixedly connected to the bottom opening inner wall of the upper cylinder (42); A cylinder cover (46) is threadedly arranged in the top opening of the water storage cylinder (21), and the outer peripheral wall of the mesh plate (31) is fixedly connected to the bottom opening inner wall of the cylinder cover (46), the top of the cylinder cover (46) is provided in a hemispherical shell shape, a conduit (47) is fixedly arranged at the center of the top end of the cylinder cover (46), and the water outlet end of the conduit (47) is inserted into the upper cylinder (42) and fixedly connected to the cylinder wall of the upper cylinder (42); The water pump (48) is fixedly arranged at the central position of the bottom end of the lower cylinder (41), the water inlet end of the water pump (48) is inserted into the filter cylinder (43) and is fixedly connected with the cylinder wall of the lower cylinder (41), the outer periphery of the bottom end of the water storage cylinder (21) is fixedly sleeved with a ring pipe (49), the inside of the ring pipe (49) is connected with the inside of the water storage cylinder (21) through a plurality of one-way valves (410), and the water outlet end of the water pump (48) is connected with a connecting pipe (411).

2. The neodymium iron boron scrap recycling device according to claim 1, wherein: The drive (23) is fixedly arranged at the bottom end of the water storage cylinder (21), and the bottom end of the rotating shaft (22) is fixedly connected with the output end of the drive (23).

3. The neodymium iron boron scrap recycling device according to claim 2, wherein: The top end of the rotating shaft (22) is connected with the bottom side of the mesh plate (31).

4. The neodymium iron boron scrap recycling device of claim 3, wherein: A plurality of limiting rods (32) are fixedly arranged on the inner wall of the water storage cylinder (21) in a circumferential array, and each limiting rod (32) is located at the middle position between the corresponding two shift rods (24).

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