Novel acid leaching purification device for neodymium iron boron waste

Abstract

The invention discloses a novel neodymium-iron-boron waste acid leaching purification device which comprises an acid leaching bin, a splash-proof plate and an oil suction bin. In the using process of the novel neodymium-iron-boron waste acid leaching purification device, the scattered neodymium-iron-boron waste on the upper layer is spread around, so that the neodymium-iron-boron waste on the middle layer can make contact with a deoiling agent; the neodymium-iron-boron waste located on the lower layer can also be scattered by the scattering rod, floating impurities in the scattered neodymium-iron-boron waste can fall off and float up in the scattering process, and the floating impurities floating up to the surface of the deoiling agent can be rotationally dredged by an upper dredging rubber disc in an upper dredging part area; in order to improve the floating separation rate of the floating impurities, a side waterproof dredging roller located on the side wall of the acid leaching bin can drive a side dredging rubber disc to rotate, so that the floating impurities flow to the collecting bin under dredging of a plurality of groups of upper dredging rubber discs which are obliquely arranged, and solid-liquid separation is carried out on the oil stains and the floating impurities. Therefore, floating impurities on the bottom layer are pushed to quickly float, and the solid-liquid separation efficiency of the oil dirt and the floating impurities is improved.

Description

Technical Field

[0001] The invention relates to the technical field of NdFeB waste recycling, in particular to a novel acid leaching and purification device for NdFeB waste. Background Art

[0002] Neodymium magnets, also known as NdFeB magnets, are tetragonal crystals formed by neodymium, iron, and boron. In 1982, Sagawa Masato of Sumitomo Special Metals discovered neodymium magnets. The magnetic energy product of this magnet is greater than that of samarium cobalt magnets, and it was the material with the largest magnetic energy product in the world at that time. Later, Sumitomo Special Metals successfully developed powder metallurgy and General Motors successfully developed the rotary spray melting method, which can produce neodymium iron boron magnets. This magnet is the permanent magnet with the second highest magnetic property after the absolute zero holmium magnet, and it is also the most commonly used rare earth magnet. Neodymium iron boron magnets are widely used in electronic products, such as hard disks, mobile phones, headphones, and battery-powered tools.

[0003] The recycling of NdFeB waste is an important area of ​​resource recycling. Although my country started late in this field, it is gradually developing and improving. The recycling of NdFeB waste mainly involves extracting rare earth elements from discarded NdFeB magnets, which play a key role in many high-tech products. The recycling process usually involves separating NdFeB magnets from waste products by physical or chemical methods, and then recovering the rare earth metals through smelting and extraction processes. This process requires professional equipment and technology, and needs to comply with relevant environmental regulations, so it is best handled by professional recycling and reuse organizations1. my country's rare earth waste recycling industry is still in its early stages of development, and the recycling system of renewable resources is not yet perfect. The main rare earth recycling channels are limited to the recycling and separation of NdFeB waste and phosphor waste, and only NdFeB waste has truly entered the industrial recycling stage. From the perspective of recycling scale, the proportion of rare earths recycled from production waste in my country to the total production of rare earth oxides is significantly lower than the global proportion, indicating that the overall scale of my country's rare earth recycling industry is still relatively limited, and the supply capacity needs to be improved. In order to improve the recycling efficiency of rare earth waste, it is necessary to strengthen the research and development of key core technologies for rare earth recycling and regeneration products, and comprehensively promote the research and development of the shortcomings of rare earth waste recycling technology. At the same time, the relevant systems and standards for the recycling of rare earth waste should be improved, the recycling system should be improved, and the recycling mechanism for scrapped devices or equipment containing rare earths should be established as soon as possible. The scope of secondary mineral resources should be gradually expanded from the current production link processing waste to a variety of retired consumer products, and the rare earth waste recycling system should be further established and improved.

[0004] A large amount of scraps, scraps and other waste materials will be generated during the processing of NdFeB. The waste contains about 30% rare earth elements, which have a very high recycling value. The main methods for processing and recycling NdFeB waste are sintering and bonding. After calcination, grinding, double salt precipitation of rare earths, sulfuric acid dissolution, alkali conversion, hydrochloric acid dissolution, double salt precipitation of iron, extraction and separation, valuable elements such as rare earths and iron can be recovered from the raw materials. Sintered NdFeB accounts for a large proportion, so the raw materials we need for powdering are mostly derived from the sintering process, in the form of powder, granules, blocks, mud, etc. In addition, in order to meet the requirements of the next process, the fineness of the NdFeB powder needs to reach 250 mesh-325 mesh.

[0005] However, the existing technology still has major deficiencies, such as:

[0006] In the above-mentioned device and the prior art, after the NdFeB waste is crushed, the oil stains attached to the surface of the NdFeB waste cannot be removed. When the NdFeB waste is acid-leached, the oil stains will affect the acid-leaching effect of the NdFeB waste and affect the recovery efficiency of the NdFeB waste. Summary of the invention

[0007] The purpose of the present invention is to provide a novel acid leaching and purification device for NdFeB waste to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: a novel acid leaching and purification device for NdFeB waste, comprising an acid leaching bin, a splash plate and an oil suction bin, wherein the oil suction bin is installed on the top of the acid leaching bin, a solid filter box is arranged at the bottom of the acid leaching bin, an inclined frame is arranged on the surface of the acid leaching bin, and the splash plate is arranged on the top of the inclined frame;

[0009] A unit for removing oil stains from the surface of the crushed waste, which is arranged in the oil absorption bin area and is used to clean and remove the oil stains remaining on the surface of the NdFeB waste after the NdFeB waste is crushed;

[0010] The floating impurities collection unit inside the crushed waste is arranged in the bottom area of ​​the inclined frame, and is used to guide and recover the floating particulate impurities in the NdFeB waste crushed materials during the degreasing and cleaning process of the NdFeB waste crushing.

[0011] Preferably, the crushed waste surface oil removal unit includes a curved arm, which is arranged in a U shape and installed on one side of the inclined frame. A first waterproof roller is arranged on one side of the bottom of the curved arm, and an evacuation turntable is installed on the rotating end of the first waterproof roller. Dispersing rods are arranged at intervals on the surface of the evacuation turntable. Two groups of evacuation turntables are arranged, and one group of evacuation turntables is installed at the bottom of the rotating end of the first waterproof roller.

[0012] Preferably, the floating impurity collection unit inside the crushed waste includes a side drainage part, the side drainage part includes side partitions, the side partitions are installed on both sides of the acid leaching tank, the side partitions are installed with side waterproof drainage rollers on the bottom area near the acid leaching tank, the rotating end of the side waterproof drainage roller is installed with a side drainage rubber disc, and the side waterproof drainage rollers are arranged in parallel into several groups.

[0013] Preferably, the floating impurity collection unit inside the crushed waste also includes an upper drainage part, the upper drainage part includes upper waterproof drainage rollers, the upper waterproof drainage rollers are arranged into several groups, several groups of upper waterproof drainage rollers are installed at the bottom of the inclined frame, upper drainage rubber discs are installed on the rotating ends of the upper waterproof drainage rollers, the upper drainage rubber discs are arranged obliquely, and a collection bin is provided on one side of the upper drainage rubber disc, and a floating particulate impurity removal unit is provided in the collection bin.

[0014] Preferably, the floating particulate impurity removal unit includes a filter screen, which is embedded in the outside of the collecting bin. A crushing roller is installed in the collecting bin, and the crushing rollers are arranged in two groups. The two groups of crushing rollers rotate in opposite directions. An adsorption tube is connected to the inside of the collecting bin, and one side of the adsorption tube is connected to the solid filter box.

[0015] Preferably, an oil storage box is installed on the top of the solid filter box, and the oil storage box is installed at the bottom of the acid leaching tank.

[0016] Preferably, a partition area is installed at the bottom of the acid leaching chamber, and a circulation channel is arranged on the surface of the partition area, and the circulation channels are arranged in a plurality of groups.

[0017] Preferably, a through groove is provided on the surface of the separation area, and an adsorption channel is connected and installed at the bottom of the oil suction bin, and the adsorption channel is inserted into the through groove.

[0018] Preferably, the surface of the adsorption channel is provided with oil suction holes, and the oil suction holes are arranged in parallel into a plurality of groups.

[0019] Preferably, oil pipelines are installed on both sides of the oil suction bin, and the oil pipelines are connected to the oil storage box.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. During use, the operator pours the NdFeB waste to be recycled into the acid leaching tank, first performs the degreasing step, and then pours the degreasing agent into the acid leaching tank so that the NdFeB waste is completely immersed in the degreasing agent. The acid leaching tank is divided into placement areas by partitions. The flow channel at the bottom of the partition allows the degreasing agents in the two partitions to circulate with each other. The oil stains in the NdFeB waste soaked in the degreasing agent are continuously dissolved and separated from the surface of the NdFeB waste. The oil stains will float to the upper layer of the degreasing agent due to their low density, and the oil stains will be adsorbed and removed through the oil absorption holes on the surface of the adsorption channel, thereby improving the effect of removing oil stains on the surface of the NdFeB waste.

[0022] 2. During use, when removing oil stains on the surface of NdFeB waste, since the NdFeB waste is in a granular state after being crushed, the NdFeB waste placed in the acid leaching bin is piled up with each other, and the NdFeB waste located in the central area of ​​the piled state is difficult to effectively contact the deoiling agent. In order to ensure that the NdFeB waste effectively contacts the deoiling agent, the evacuation turntable is driven to rotate by the first waterproof roller, and the evacuation turntable drives the scattering rod to slowly scatter the NdFeB waste when rotating. The scattered upper layer of NdFeB waste is spread around, so that the NdFeB waste in the middle layer will contact the deoiling agent. Since the evacuation turntable is a double-layer setting, the NdFeB waste in the lower layer will also be scattered by the scattering rod, thereby ensuring that the NdFeB waste is fully in contact with the deoiling agent, and further improving the effect of removing oil stains on the surface of the NdFeB waste;

[0023] 3. During use, the NdFeB waste dispersed by the double-layer evacuation turntable and the evacuation rod will be in full contact with the deoiling agent. At the same time, the floating impurities in the dispersed NdFeB waste will fall off and float up during the dispersion process. The floating impurities floating to the surface of the deoiling agent will be guided by the rotation of the upper evacuation rubber disc in the upper evacuation area, so that the floating impurities will flow to the collection bin under the guidance of multiple groups of upper evacuation rubber discs arranged obliquely, thereby separating the oil from the floating impurities by solid-liquid separation. In order to increase the floating and separation rate of the floating impurities, the side waterproof evacuation roller located on the side wall of the acid leaching bin will drive the side evacuation rubber disc to rotate, thereby pushing the floating impurities located at the bottom to float up quickly, thereby improving the solid-liquid separation efficiency of the oil from the floating impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of the device of the present invention;

[0025] Figure 2 It is a schematic diagram of the side partition and the side drainage rubber plate in the present invention;

[0026] Figure 3 It is a schematic diagram of the oil suction hole part in the present invention;

[0027] Figure 4 It is a schematic diagram of the bending arm part in the present invention;

[0028] Figure 5 It is a partial schematic diagram of the oil suction bin in the present invention;

[0029] Figure 6 It is a schematic diagram of the collection bin part in the present invention;

[0030] Figure 7 It is a schematic diagram of the oblique frame and the upper drainage rubber plate in the present invention;

[0031] Figure 8 It is a partial schematic diagram of the adsorption tube and the oil storage box in the present invention.

[0032] In the figure: 1. acid leaching chamber; 11. partition area; 12. circulation channel; 13. through groove; 2. splash plate; 3. oil suction chamber; 31. adsorption channel; 32. oil pipeline; 33. oil suction hole; 34. oil storage box; 5. solid filter box; 6. oblique frame; 61. upper waterproof drainage roller; 62. upper drainage rubber disc; 7. bent arm; 71. first waterproof roller; 72. evacuation rotary disc; 73. scattering rod; 8. side partition; 81. side waterproof drainage roller; 82. side drainage rubber disc; 9. collection chamber; 91. adsorption tube; 92. crushing roller; 93. filter screen. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-8 , the present invention provides a technical solution:

[0035] Embodiment 1: A novel acid leaching purification device for NdFeB waste: comprising an acid leaching tank 1, a splash plate 2 and an oil suction tank 3, wherein the oil suction tank 3 is installed on the top of the acid leaching tank 1, a solid filter box 5 is arranged at the bottom of the acid leaching tank 1, an inclined frame 6 is arranged on the surface of the acid leaching tank 1, and the splash plate 2 is arranged on the top of the inclined frame 6;

[0036] An oil storage box 34 is installed on the top of the solid filter box 5 , and the oil storage box 34 is installed at the bottom of the acid leaching tank 1 .

[0037] A partition area 11 is installed at the bottom of the acid leaching chamber 1. A flow channel 12 is arranged on the surface of the partition area 11. The flow channels 12 are arranged in a plurality of groups.

[0038] A through groove 13 is provided on the surface of the partition area 11 , and an adsorption channel 31 is connected and installed at the bottom of the oil suction bin 3 , and the adsorption channel 31 is inserted into the through groove 13 .

[0039] The surface of the adsorption channel 31 is provided with oil suction holes 33 , and the oil suction holes 33 are arranged in parallel in a plurality of groups.

[0040] Oil delivery pipes 32 are installed on both sides of the oil suction bin 3 , and the oil delivery pipes 32 are connected to the oil storage box 34 .

[0041] In this embodiment, the operator pours the NdFeB waste to be recycled into the acid leaching tank 1, first performs the degreasing step, and then pours the degreasing agent into the acid leaching tank 1 so that the NdFeB waste is completely immersed in the degreasing agent. The interior of the acid leaching tank 1 is divided into placement areas by a partition 11. The flow channel 12 at the bottom of the partition 11 allows the degreasing agents in the two partitions to circulate with each other. The oil stains in the NdFeB waste soaked in the degreasing agent are continuously dissolved and separated from the surface of the NdFeB waste. The oil stains will float to the upper layer of the degreasing agent due to their low density, and the oil stains will be adsorbed and removed through the oil absorption holes 33 on the surface of the adsorption channel 31, thereby improving the oil stain removal effect on the surface of the NdFeB waste.

[0042] The unit for removing oil stains from the surface of the crushed waste is arranged in the oil suction bin 3 area, and is used to clean and remove the oil stains remaining on the surface of the NdFeB waste after the NdFeB waste is crushed;

[0043] The unit for removing oil stains from the surface of crushed waste includes a curved arm 7, which is arranged in a U shape and installed on one side of the inclined frame 6. A first waterproof roller 71 is arranged on one side of the bottom of the curved arm 7. An evacuation turntable 72 is installed on the rotating end of the first waterproof roller 71. Dispersing rods 73 are arranged at intervals on the surface of the evacuation turntable 72. Two groups of evacuation turntables 72 are arranged, and one group of evacuation turntables 72 is installed at the bottom of the rotating end of the first waterproof roller 71.

[0044] In this embodiment, when removing oil stains on the surface of NdFeB waste, since the NdFeB waste is in a granular state after being crushed, the NdFeB waste placed in the acid leaching chamber 1 is piled up with each other, and the NdFeB waste located in the center area of ​​the piled state is difficult to effectively contact the deoiling agent. In order to ensure that the NdFeB waste effectively contacts the deoiling agent, the evacuation turntable 72 is driven to rotate by the first waterproof roller 71, and the evacuation turntable 72 drives the scattering rod 73 to slowly scatter the NdFeB waste when rotating. The upper layer of NdFeB waste that has been scattered spreads to the surrounding area, so that the NdFeB waste in the middle layer will contact the deoiling agent. Since the evacuation turntable 72 is a double-layer setting, the NdFeB waste in the lower layer will also be scattered by the scattering rod 73, thereby ensuring sufficient contact between the NdFeB waste and the deoiling agent, and further improving the effect of removing oil stains on the surface of the NdFeB waste.

[0045] The floating impurities collection unit inside the crushed waste is arranged at the bottom area of ​​the inclined frame 6, and is used to guide and recover the floating particulate impurities in the NdFeB waste crushed materials during the degreasing and cleaning process of the NdFeB waste crushed materials;

[0046] The floating impurity collection unit inside the crushed waste includes a side drainage part, which includes a side partition 8, which is installed on both sides of the acid leaching tank 1. The side partition 8 is close to the bottom area of ​​the acid leaching tank 1 and is equipped with a side waterproof drainage roller 81. A side drainage rubber disc 82 is installed on the rotating end of the side waterproof drainage roller 81. The side waterproof drainage rollers 81 are arranged in parallel in several groups.

[0047] The floating impurity collection unit inside the crushed waste also includes an upper drainage part, which includes upper waterproof drainage rollers 61. The upper waterproof drainage rollers 61 are arranged in several groups, and several groups of upper waterproof drainage rollers 61 are installed at the bottom of the oblique frame 6. An upper drainage rubber disc 62 is installed on the rotating end of the upper waterproof drainage roller 61. The upper drainage rubber disc 62 is arranged obliquely. A collection bin 9 is arranged on one side of the upper drainage rubber disc 62, and a floating particle impurity removal unit is arranged in the collection bin 9.

[0048] In this embodiment, the NdFeB waste dispersed by the double-layer evacuation turntable 72 and the evacuation rod 73 will be in full contact with the deoiling agent. At the same time, the floating impurities in the dispersed NdFeB waste will fall off and float up during the dispersion process. The floating impurities floating to the surface of the deoiling agent will be guided by the rotation of the upper evacuation rubber disc 62 in the upper evacuation area, so that the floating impurities flow to the collection bin 9 under the guidance of the multiple groups of upper evacuation rubber discs 62 arranged obliquely, thereby separating the oil and the floating impurities into solid-liquid. In order to increase the floating and separation rate of the floating impurities, the side waterproof evacuation roller 81 located on the side wall of the acid leaching bin 1 will drive the side evacuation rubber disc 82 to rotate, thereby pushing the floating impurities located at the bottom layer to float up quickly, thereby improving the solid-liquid separation efficiency of the oil and the floating impurities.

[0049] Embodiment 2:

[0050] Based on the first embodiment, the second embodiment takes into account that the floating impurities guided by the multiple groups of upper guiding rubber discs 62 flow into the collecting bin 9. In order to ensure the collection effect of solid floating impurities and to prevent the solid floating impurities from clogging the adsorption tube 91, the second embodiment is provided with floating particulate impurities to solve the above problems.

[0051] The floating particulate matter impurity removal unit includes a filter screen 93, which is embedded in the outside of the collecting bin 9. A crushing roller 92 is installed in the collecting bin 9. The crushing rollers 92 are arranged in two groups, and the two groups of crushing rollers 92 rotate in opposite directions. An adsorption tube 91 is connected to the inside of the collecting bin 9, and one side of the adsorption tube 91 is connected to the solid filter box 5.

[0052] In this embodiment, when the solid floating impurities follow the liquid into the collecting bin 9, they will be crushed by the crushing roller 92 inside the collecting bin 9. The crushed solid floating impurities will be discharged outward along the adsorption tube 91. At the same time, the filter screen 93 will circulate and discharge the deoiling agent, thereby accelerating the separation efficiency of the floating impurities.

[0053] Working principle: During the use of the device, the operator pours the NdFeB waste to be recycled into the acid leaching tank 1, first performs the degreasing step, and then pours the degreasing agent into the acid leaching tank 1, so that the NdFeB waste is completely immersed in the degreasing agent. The inside of the acid leaching tank 1 is divided into placement areas by the partition area 11. The flow channel 12 at the bottom of the partition area 11 allows the degreasing agents in the two partitions to circulate with each other. The oil stains in the NdFeB waste soaked in the degreasing agent are continuously dissolved and separated from the surface of the NdFeB waste. The oil stains will float to the upper layer of the degreasing agent due to their low density, and the oil stain liquid will be adsorbed and removed through the oil absorption holes 33 on the surface of the adsorption channel 31;

[0054] When removing the oil stains on the surface of the NdFeB waste, since the NdFeB waste is in a granular state after being crushed, the NdFeB waste placed in the acid leaching bin 1 is piled up with each other, and the NdFeB waste located in the central area of ​​the piled state is difficult to effectively contact the deoiling agent. In order to ensure that the NdFeB waste effectively contacts the deoiling agent, the evacuation turntable 72 is driven to rotate by the first waterproof roller 71, and the evacuation turntable 72 drives the scattering rod 73 to slowly scatter the NdFeB waste when rotating. The scattered upper layer of NdFeB waste is spread around, so that the NdFeB waste in the middle layer will contact the deoiling agent. Since the evacuation turntable 72 is a double-layer setting, the NdFeB waste in the lower layer will also be scattered by the scattering rod 73, thereby ensuring that the NdFeB waste is fully in contact with the deoiling agent.

[0055] The NdFeB waste dispersed by the double-layer evacuation turntable 72 and the evacuation rod 73 will be in full contact with the deoiling agent. At the same time, the floating impurities in the dispersed NdFeB waste will fall off and float up during the dispersion process. The floating impurities floating to the surface of the deoiling agent will be guided by the rotation of the upper evacuation rubber disc 62 in the upper evacuation area, so that the floating impurities flow to the collection bin 9 under the guidance of the multiple groups of upper evacuation rubber discs 62 arranged obliquely, so as to separate the oil pollution from the floating impurities by solid-liquid separation. In order to increase the floating and separation rate of the floating impurities, the side waterproof evacuation roller 81 located on the side wall of the acid leaching bin 1 will drive the side evacuation rubber disc 82 to rotate, thereby pushing the floating impurities located at the bottom to float up quickly;

[0056] The floating impurities guided by multiple groups of upper guiding rubber discs 62 flow into the collecting bin 9. In order to ensure the collection effect of solid floating impurities and to prevent the solid floating impurities from clogging the adsorption tube 91, the solid floating impurities will be crushed by the crushing roller 92 inside the collecting bin 9 when entering the collecting bin 9 along with the liquid. The crushed solid floating impurities will be discharged outward along the adsorption tube 91, and the filter screen 93 will circulate and discharge the deoiling agent.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel acid leaching and purification device for NdFeB waste, characterized by: It comprises an acid leaching tank (1), a splash plate (2) and an oil suction tank (3), wherein the oil suction tank (3) is installed on the top of the acid leaching tank (1), a solid filter box (5) is arranged at the bottom of the acid leaching tank (1), an inclined frame (6) is arranged on the surface of the acid leaching tank (1), and the splash plate (2) is arranged on the top of the inclined frame (6); A unit for removing oil stains from the surface of the crushed waste, the unit being arranged in the oil suction bin (3) and used for cleaning and removing the oil stains remaining on the surface of the NdFeB waste after the NdFeB waste is crushed; A unit for collecting floating impurities inside the crushed waste is provided at the bottom area of ​​the inclined frame (6) and is used for guiding and recovering floating particulate impurities in the crushed NdFeB waste during the degreasing and cleaning process of the crushed NdFeB waste.

2. A novel acid leaching and purification device for NdFeB waste according to claim 1, characterized in that: The crushed waste surface oil removal unit comprises a curved arm (7), the curved arm (7) is arranged in a U shape, the curved arm (7) is mounted on one side of the inclined frame (6), a first waterproof roller (71) is arranged on one side of the bottom of the curved arm (7), an evacuation rotating disk (72) is mounted on the rotating end of the first waterproof rotating roller (71), and a dispersing rod (73) is arranged on the surface of the evacuation rotating disk (72) at intervals, and two groups of evacuation rotating disks (72) are arranged, and one group of the evacuation rotating disks (72) is mounted on the bottom of the rotating end of the first waterproof rotating roller (71).

3. A novel acid leaching and purification device for NdFeB waste according to claim 2, characterized in that: The floating impurity collection unit inside the crushed waste comprises a side drainage part, and the side drainage part comprises a side baffle (8). The side baffle (8) is installed on both sides inside the acid leaching bin (1). The side baffle (8) is installed with a side waterproof drainage roller (81) on the bottom area of ​​the acid leaching bin (1) near the side baffle (8). A side drainage rubber disc (82) is installed on the rotating end of the side waterproof drainage roller (81). The side waterproof drainage roller (81) is arranged in parallel in a plurality of groups.

4. A novel acid leaching and purification device for NdFeB waste according to claim 3, characterized in that: The floating impurity collection unit inside the crushed waste also includes an upper drainage part, the upper drainage part includes upper waterproof drainage rollers (61), the upper waterproof drainage rollers (61) are arranged in a plurality of groups, the plurality of groups of upper waterproof drainage rollers (61) are installed at the bottom of the inclined frame (6), an upper drainage rubber disc (62) is installed on the rotating end of the upper waterproof drainage roller (61), the upper drainage rubber disc (62) is arranged obliquely, a collection bin (9) is arranged on one side of the upper drainage rubber disc (62), and a floating particle impurity removal unit is arranged in the collection bin (9).

5. A novel acid leaching and purification device for NdFeB waste according to claim 4, characterized in that: The floating particulate matter impurity removal unit comprises a filter screen (93), the filter screen (93) is embedded and installed on the outside of the collection bin (9), a crushing roller (92) is installed in the collection bin (9), the crushing roller (92) is arranged in two groups, the two groups of crushing rollers (92) rotate in opposite directions, the collection bin (9) is connected to an adsorption tube (91), and one side of the adsorption tube (91) is connected to the solid filter box (5).

6. A novel acid leaching and purification device for NdFeB waste according to claim 1, characterized in that: An oil storage box (34) is installed on the top of the solid filter box (5), and the oil storage box (34) is installed at the bottom of the acid leaching tank (1).

7. A novel acid leaching and purification device for NdFeB waste according to claim 5, characterized in that: A partition area (11) is installed at the bottom of the acid leaching chamber (1), and a circulation channel (12) is arranged on the surface of the partition area (11), and the circulation channels (12) are arranged in a plurality of groups.

8. A novel acid leaching and purification device for NdFeB waste according to claim 7, characterized in that: A through groove (13) is provided on the surface of the partition area (11), and an adsorption channel (31) is connected and installed at the bottom of the oil absorption bin (3), and the adsorption channel (31) is inserted into the through groove (13).

9. A novel acid leaching and purification device for NdFeB waste according to claim 8, characterized in that: The surface of the adsorption channel (31) is provided with oil suction holes (33), and the oil suction holes (33) are arranged in parallel in a plurality of groups.

10. A novel acid leaching and purification device for NdFeB waste according to claim 6, characterized in that: Oil delivery pipes (32) are installed on both sides of the oil suction bin (3), and the oil delivery pipes (32) are connected to the oil storage box (34).

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