Neodymium-iron-boron waste material acid leaching purification device

Abstract

The invention relates to the technical field of neodymium iron boron acid leaching purification, in particular to a neodymium iron boron waste acid leaching purification device. The device comprises a supporting seat, a ball mill is arranged above the supporting seat, the ball mill is used for crushing and grinding neodymium iron boron waste, and a mixing assembly is arranged in an acid leaching box. When a lead screw rotates to drive a stirring rod to rotate to stir an acid solution, the lead screw rotates to drive a moving plate to move in the horizontal direction, and the moving plate drives a fixing frame to move; a friction roller arranged at the end part of the fixed frame always fits the inner wall of the acid leaching box to move, the friction roller drives a first gear to coaxially rotate during rotation, the first gear drives a second gear to rotate in an engaged manner during rotation, and an eccentric wheel arranged at the end part of the second gear rotates to periodically press the top of an extension arm; and the extension arm drives the sliding rod to reciprocate in the vertical direction, so that the pressing plate arranged at the bottom of the sliding rod repeatedly presses the bottom of the acid leaching box, and the crushing efficiency of waste particles deposited at the bottom of the acid leaching box is improved.

Description

Technical Field

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

[0002] NdFeB is a magnet. This type of magnet is a permanent magnet whose magnetic properties are second only to the absolute zero holmium magnet. It is also the most commonly used rare earth magnet. A large amount of waste is generated in the production process of NdFeB. The waste contains a large amount of valuable components such as praseodymium and neodymium. Therefore, the recycling of rare earths in NdFeB waste is of great economic significance.

[0003] There are many existing technologies for purification devices, such as: Chinese patent publication number CN114427042A discloses a separation device for extracting high-purity rare earth oxides from NdFeB waste, including a chassis, a limiting mechanism fixedly installed on the top of the chassis, a first vertical plate fixedly installed on the top of the limiting mechanism, and a first fixed block fixedly installed on the right end of the first vertical plate. The present invention sets a roller, teeth and a grinding wheel. Due to the operation of the first motor, the roller will be driven to rotate by the teeth, so that the NdFeB waste is ground inside the roller by the grinding wheel, so that the oxide on the outer layer of the NdFeB waste is ground into powder and falls off. Compared with the traditional device, the device grinds the oxide layer by grinding, so that the oxide layer is ground into powder and separated from the NdFeB waste, so that the internal NdFeB waste is fully contacted with oxygen and undergoes an oxidation reaction.

[0004] However, there are still some problems in actual use: At present, in the process of traditional purification equipment, when the NdFeB waste is crushed by the ball mill, some larger particles are still put into the acid leaching box, resulting in the acid liquid being unable to fully react with them. At the same time, after the acid leaching is completed, the acid liquid will remain in the unreacted waste, resulting in the waste of some acid liquid containing dissolved metal ions.

[0005] In view of this, we propose an acid leaching and purification device for NdFeB waste. Summary of the invention

[0006] The object of the present invention is to provide an acid leaching and purification device for NdFeB waste to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned object, the present invention aims to provide an acid leaching and purification device for NdFeB waste, including a support seat, a ball mill is arranged above the support seat, the ball mill is used to crush and grind the NdFeB waste, a bellows is arranged at the output end of the ball mill, an acid leaching box is arranged at the end of the bellows, an acid solution is contained in the acid leaching box, a rotating shaft is arranged between the acid leaching box and the support seat, cylinders are arranged on both sides of the rotating shaft, the length of the cylinder output end is controlled to adjust the horizontal position of the acid leaching box, a mixing component is arranged inside the acid leaching box, and the mixing component The component is used to stir the NdFeB powder soaked in the acid leaching box to make the powder mixed evenly. An extrusion component is provided on the surface of the mixing component. During the stirring process of the inside of the acid leaching box, the extrusion component extrude and crush the large-grained NdFeB waste material precipitated at the bottom of the acid leaching box. At the same time, after the mixing is completed, the remaining waste residue is squeezed by the extrusion component to accelerate the elements dissolved in the acid solution to flow out from the filter port at the end of the acid leaching box. A mist suction component is provided on the top of the acid leaching box. The mist suction component is used to purify the acid mist generated in the acid leaching box.

[0008] As a further improvement of the present technical solution, the mixing assembly includes a motor arranged on one side of the acid immersion tank, a screw is provided at the output end of the motor, a transmission shaft is provided on the surface and both sides below the screw, a stirring rod is provided at the end of the transmission shaft, and the transmission shafts are connected by a transmission belt.

[0009] As a further improvement of the technical solution, the stirring rods are symmetrically arranged inside the acid leaching box. When the transmission shaft at the end of the stirring rods is driven to rotate by the transmission belt, the stirring rods rotate in relative directions to stir the inside of the acid leaching box.

[0010] As a further improvement of the technical solution, an extrusion assembly is provided on the surface of the screw rod, and when the screw rod rotates, the extrusion assembly is driven to reciprocate in the horizontal direction. The extrusion assembly is used to crush the NdFeB waste particles deposited at the bottom of the acid leaching tank.

[0011] As a further improvement of the present technical solution, the extrusion assembly includes a movable plate arranged on the surface of the screw rod, fixed frames are arranged on both sides of the movable plate, a column tube is arranged at the bottom of the fixed frame, a sliding groove is opened on the side wall of the column tube, a sliding rod is slidingly arranged on the inner wall of the column tube, extension arms are arranged on both sides of the sliding rod, a compression spring is arranged between the column tube and the sliding rod, and a pressure plate is arranged at the bottom of the sliding rod.

[0012] As a further improvement of the technical solution, the bottom of the pressure plate is arc-shaped. When the extension arm is pressed to drive the slide rod to move downward in the vertical direction, the pressure plate at the end of the slide rod crushes the NdFeB waste particles precipitated at the bottom of the acid leaching box.

[0013] As a further improvement of the technical solution, a friction roller is provided inside the fixed frame, and the friction roller slides against the side wall of the acid immersion box. A first gear is provided on the top of the friction roller, and second gears are provided on both sides above the first gear. An eccentric wheel is provided at the end of the second gear, and the second gear drives the eccentric wheel to rotate to squeeze the top of the extension arm.

[0014] As a further improvement of the technical solution, a main gear is provided at the end of the screw rod, and a mist suction component is provided above the main gear. The mist suction component is used to purify the acid mist generated by the acidification reaction.

[0015] As a further improvement of the present technical solution, the mist suction assembly includes a gear rod arranged above the main gear, a bevel gear is arranged at the end of the gear rod, a fan blade is arranged above the bevel gear, and when the bevel gear rotates, the fan blade is driven to rotate coaxially. An adsorption box is arranged above the fan blade, and air is blown to the outside through the fan blade to allow the acid mist to enter the adsorption box for purification.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the NdFeB waste acid leaching and purification device, the lead screw is driven to rotate by the output end of the motor. When the motor drives the lead screw to rotate, the transmission shaft provided under the lead screw drives the stirring rod to rotate through the transmission belt. When the stirring rod rotates relatively to mix the NdFeB waste in the acid solution, it is avoided that artificial stirring causes the solution to splash and cause safety hazards. During the stirring process of the stirring rod, the waste particles can be fully contacted with the acid solution, thereby increasing the reaction rate of the acid solution and the waste.

[0017] 2. In the NdFeB waste acid leaching and purification device, the movable plate is driven to move in the horizontal direction by the rotation of the screw rod, and the movable plate drives the fixed frame to move. The friction roller provided at the end of the fixed frame always moves in contact with the inner wall of the acid leaching box. When the friction roller rotates, it drives the first gear to rotate coaxially. When the first gear rotates, it drives the second gear to rotate in meshing. The eccentric wheel provided at the end of the second gear rotates to periodically press the top of the extension arm. The extension arm drives the slide bar to reciprocate in the vertical direction, so that the pressure plate provided at the bottom of the slide bar repeatedly presses the bottom of the acid leaching box for multiple times, thereby accelerating the efficiency of crushing the waste particles deposited at the bottom of the acid leaching box.

[0018] 3. In the NdFeB waste acid leaching and purification device, the piston rod at the end of the cylinder below the acid leaching box is controlled to rotate the acid leaching box along the rotating shaft to an angle of 30 degrees with the horizontal plane, and the output end of the motor is controlled to drive the screw to rotate. When the screw rotates, it drives the moving plate to move. During the movement, the moving plate drives the friction roller to roll on the inner wall of the acid leaching box. During the rolling process of the acid leaching box, the first gear is driven to rotate. When the first gear rotates, it drives the second gears provided on both sides above to mesh and rotate. When the second gear rotates, it drives the eccentric wheel to rotate coaxially. When the eccentric wheel rotates, it periodically squeezes the extension arm provided below. When the extension arm is squeezed by the eccentric wheel, the extension arm drives the slide bar to move downward in the vertical direction, so that the pressure plate provided at the bottom of the slide bar squeezes the unreacted waste particles at the bottom of the acid leaching box, so that the acid solution adsorbed in the waste is quickly discharged from the filter port, thereby improving the extraction efficiency of the NdFeB waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the ball mill structure of the present invention; Figure 3 It is a schematic diagram of the structure of the acid leaching tank of the present invention; Figure 4 It is a cross-sectional view of the acid leaching tank of the present invention; Figure 5 It is a schematic diagram of the structure of the mixing assembly of the present invention; Figure 6 It is a schematic diagram of the stirring rod structure of the present invention; Figure 7 is a cross-sectional view of an extrusion assembly of the present invention; Figure 8 For the present invention Figure 7 Cross-sectional view of the moving component at A.

[0020] The meaning of each number in the figure is: 100, support seat; 101, ball mill; 102, bellows; 200, acid immersion tank; 201, rotating shaft; 202, cylinder; 300, mixing assembly; 301, motor; 302, screw rod; 303, transmission shaft; 304, stirring rod; 305, main gear; 400, extrusion assembly; 401, moving plate; 402, fixed frame; 403, friction roller; 404, first gear; 405, second gear; 406, eccentric wheel; 407, cylinder; 408, slide bar; 409, compression spring; 410, pressure plate; 411, extension arm; 500, mist suction assembly; 501, gear rod; 502, bevel gear; 503, fan blade; 504, adsorption box. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] The purpose of this embodiment is to provide a device for acid leaching and purification of NdFeB waste. Figure 1-Figure 8 As shown, it includes a support base 100, a ball mill 101 is arranged above the support base 100, the ball mill 101 is used to crush and grind NdFeB waste, a bellows 102 is arranged at the output end of the ball mill 101, an acid immersion box 200 is arranged at the end of the bellows 102, an acid solution is contained in the acid immersion box 200, a rotating shaft 201 is arranged between the acid immersion box 200 and the support base 100, cylinders 202 are arranged on both sides of the rotating shaft 201, the length of the output end of the cylinder 202 is controlled to adjust the horizontal position of the acid immersion box 200, and a mixing assembly 300 is arranged inside the acid immersion box 200, and the mixing assembly 300 is used to mix the acid solution in the acid immersion box 200. The acid-immersed NdFeB powder is stirred to make the powder mixed evenly. An extrusion component 400 is provided on the surface of the mixing component 300. When the mixing component 300 stirs the inside of the acid immersion tank 200, the extrusion component 400 extrude and crush the large-particle NdFeB waste material precipitated at the bottom of the acid immersion tank 200. At the same time, after the mixing is completed, the remaining waste residue is squeezed by the extrusion component 400 to accelerate the elements dissolved in the acid solution to flow out from the filter port at the end of the acid immersion tank 200. A mist suction component 500 is provided on the top of the acid immersion tank 200, and the mist suction component 500 is used to purify the acid mist generated in the acid immersion tank 200.

[0024] In the process of acid leaching and purification of NdFeB waste, since the waste is in block form, its surface contact area is small when reacting with acid solution, resulting in low efficiency of acid leaching reaction. Moreover, when the waste undergoes acidification reaction, the mixing speed is slow, which affects the purification efficiency. Therefore, the mixing component 300 includes a motor 301 arranged on one side of the acid leaching tank 200, a screw 302 is arranged at the output end of the motor 301, a transmission shaft 303 is arranged on the surface and both sides below the screw 302, and a stirring rod 304 is arranged at the end of the transmission shaft 303. The transmission shafts 303 are connected by a transmission belt. The stirring rod 304 is symmetrically arranged inside the acid leaching tank 200. When the transmission shaft 303 at the end of the stirring rod 304 is driven by the transmission belt to rotate, the stirring rod 304 rotates in relative directions to stir the inside of the acid leaching tank 200, and the NdFeB waste is put into the ball mill 101 for crushing. The working principle of the ball mill 101 is as follows: The ball mill 101 is a device used to crush and grind various ores and other materials. When processing NdFeB waste, it mainly achieves crushing through the interaction between the medium grinding balls and the material NdFeB waste. When the ball mill 101 rotates, the grinding balls are brought to a certain height due to the centrifugal force, and then fall down. The grinding balls impact the NdFeB waste during the falling process. At the same time, due to the rotation of the cylinder of the ball mill 101, grinding and friction will also occur between the grinding balls and the waste. These combined mechanical actions make the NdFeB waste gradually broken into smaller particles; When the grinding of the NdFeB waste is completed, the waste particle powder is transmitted to the inside of the acid leaching box 200 through the output end of the ball mill 101 for acidification and purification. Since the acid leaching box 200 contains an acidic solution with certain corrosiveness, the output end of the motor 301 drives the screw rod 302 to rotate. When the motor 301 drives the screw rod 302 to rotate, the transmission shaft 303 provided under the screw rod 302 drives the stirring rod 304 to rotate through the transmission belt. When the stirring rod 304 rotates relatively to mix the NdFeB waste in the acidic solution, it is avoided that the solution splashes due to artificial stirring to generate safety hazards. During the stirring process of the stirring rod 304, the waste particles can be fully contacted with the acid solution, thereby increasing the reaction rate of the acidic solution and the waste.

[0025] When the NdFeB waste is transferred from the output end of the ball mill 101 to the inside of the acid leaching box 200, some of the waste still remains in large particles during the ball milling process, resulting in insufficient reaction during the acid leaching process. Therefore, an extrusion component 400 is provided on the surface of the screw rod 302. When the screw rod 302 rotates, it drives the extrusion component 400 to reciprocate in the horizontal direction. The extrusion component 400 is used to crush the NdFeB waste particles deposited at the bottom of the acid leaching box 200. The extrusion component 400 includes a movable plate 401 arranged on the surface of the screw rod 302, fixed frames 402 are provided on both sides of the movable plate 401, a column 407 is provided at the bottom of the fixed frame 402, a slide groove is provided on the side wall of the column 407, a slide rod 408 is slidably provided on the inner wall of the column 407, and extension arms 411 are provided on both sides of the slide rod 408. A compression spring 409 is provided between the column 407 and the slide rod 408, and a pressure plate 410 is provided at the bottom of the slide rod 408. The bottom of the pressure plate 410 is round When the extension arm 411 is pressed to drive the slide bar 408 to move downward in the vertical direction, the pressure plate 410 at the end of the slide bar 408 crushes the NdFeB waste particles deposited at the bottom of the acid leaching tank 200. When the motor 301 drives the screw rod 302 to rotate, the movable plate 401 provided on the surface of the screw rod 302 moves in the horizontal direction. The movable plate 401 drives the fixed frame 402 to move during the movement. During the movement of the fixed frame 402, the extension arm 411 is pressed to drive the slide bar 408 to move in the vertical direction, so that the pressure plate 410 provided at the bottom of the slide bar 408 presses and crushes the larger waste particles deposited at the bottom of the acid leaching tank 200. Since the bottom of the pressure plate 410 is in an arc shape, the contact area between the pressure plate 410 and the bottom of the acid leaching tank 200 is small. Therefore, the pressure on the waste particles deposited at the bottom of the acid leaching tank 200 is relatively large, and it is easier to crush the waste particles and accelerate the reaction speed of the waste and the acid solution.

[0026] During the acid leaching process, in order to make the pressing plate 410 repeatedly move to break the waste particles precipitated at the bottom of the acid leaching box 200, a friction roller 403 is provided inside the fixed frame 402. The friction roller 403 slides against the side wall of the acid leaching box 200. A first gear 404 is provided on the top of the friction roller 403. Second gears 405 are provided on both sides above the first gear 404. An eccentric wheel 406 is provided at the end of the second gear 405. When the second gear 405 drives the eccentric wheel 406 to rotate, it squeezes the top of the extension arm 411. When the screw rod 302 rotates to drive the stirring rod 304 to rotate to stir the acid solution, the screw rod 302 rotates to drive the movable plate 401 to move in the horizontal direction. The movable plate 401 drives the fixed frame 402 to move, and the friction roller 403 provided at the end of the fixed frame 402 always moves in contact with the inner wall of the pickling tank 200. When the friction roller 403 rotates, it drives the first gear 404 to rotate coaxially. When the first gear 404 rotates, it drives the second gear 405 to rotate in meshing. The eccentric wheel 406 provided at the end of the second gear 405 rotates to periodically press the top of the extension arm 411. The extension arm 411 drives the slide bar 408 to reciprocate in the vertical direction, so that the pressing plate 410 provided at the bottom of the slide bar 408 repeatedly presses the bottom of the pickling tank 200 for many times, thereby accelerating the efficiency of crushing the waste particles deposited at the bottom of the pickling tank 200. At the same time, when the purification is completed, the acid solution is discharged from the filter port on the side of the acid leaching box 200 for processing to extract rare earth. Since the waste that has not reacted with the acid solution is accumulated at the bottom of the acid leaching box 200, when the acid solution is taken out, part of the solution remains at the bottom of the acid leaching box 200. It takes a long time to completely take out the residual solution inside. Therefore, by controlling the piston rod at the end of the cylinder 202 under the acid leaching box 200, the acid leaching box 200 is rotated along the rotating shaft 201 to an angle of 30 degrees with the horizontal plane, and the output end of the control motor 301 drives the screw rod 302 to rotate. When the screw rod 302 rotates, it drives the moving plate 401 to move. The moving plate 401 drives the friction roller 403 during the movement. It rolls on the inner wall of the acid immersion box 200. During the rolling process, the acid immersion box 200 drives the first gear 404 to rotate. When the first gear 404 rotates, it drives the second gears 405 provided on both sides above to mesh and rotate. When the second gear 405 rotates, it drives the eccentric wheel 406 to rotate coaxially. When the eccentric wheel 406 rotates, it periodically squeezes the extension arm 411 provided below. When the extension arm 411 is squeezed by the eccentric wheel 406, the extension arm 411 drives the slide bar 408 to move downward in the vertical direction, so that the pressing plate 410 provided at the bottom of the slide bar 408 squeezes the unreacted waste particles at the bottom of the acid immersion box 200, so that the acid solution adsorbed in the waste is quickly discharged from the filter port, thereby improving the extraction efficiency of the NdFeB waste.

[0027] During the acid leaching process, since acid mist is easily generated during the reaction process, when the acid mist drifts into the environment, it is easy to cause environmental pollution and discomfort to personnel. Therefore, a main gear 305 is provided at the end of the screw rod 302, and a mist suction component 500 is provided above the main gear 305. The mist suction component 500 is used to purify the acid mist generated by the acidification reaction. The mist suction component 500 includes a gear rod 501 arranged above the main gear 305, a bevel gear 502 is provided at the end of the gear rod 501, and a fan blade 503 is provided above the bevel gear 502. When the bevel gear 502 rotates, the fan blade 503 is driven to rotate coaxially. An adsorption box 504 is provided above the fan blade 503, and air is blown to the outside through the fan blade 503 to allow the acid mist to enter the adsorption box. The interior of the auxiliary box 504 is purified. When the screw 302 drives the main gear 305 to rotate, the main gear 305 drives the gear rod 501 to mesh and rotate. When the gear rod 501 rotates, it drives the bevel gear 502 to mesh and rotate. Since the tooth ratio of the gear at the end of the gear rod 501 and the bevel gear 502 is 3:1, when the gear rod 501 rotates, it can drive the fan blade 503 to accelerate the rotation to blow air to the outside of the acid immersion box 200, so that the generated acid mist flows from the fan blade 503 to the inside of the adsorption box 504. The adsorption box 504 includes an outer shell and an adsorbent filled inside. The outer shell is usually made of corrosion-resistant material, and the adsorbent is calcium hydroxide, thereby avoiding overflow of acid mist and avoiding safety hazards caused by inhalation by people.

[0028] When used specifically, the NdFeB waste is put into the ball mill 101 for crushing, and the waste particle powder is transmitted to the acid leaching box 200 through the output end of the ball mill 101 for acidification and purification. The output end of the motor 301 drives the screw rod 302 to rotate. When the motor 301 drives the screw rod 302 to rotate, the transmission shaft 303 provided under the screw rod 302 drives the stirring rod 304 to rotate through the transmission belt. When the stirring rod 304 rotates relatively to mix the NdFeB waste in the acid solution, it is avoided that the solution splashes due to artificial stirring to generate safety hazards. During the stirring process of the stirring rod 304, the waste particles can be fully contacted with the acid solution, thereby increasing the reaction speed of the acid solution and the waste. When the screw rod 302 rotates and drives the stirring rod 304 to rotate, the acid solution When stirring, the screw rod 302 rotates to drive the movable plate 401 to move in the horizontal direction, and the movable plate 401 drives the fixed frame 402 to move. The friction roller 403 provided at the end of the fixed frame 402 always moves in contact with the inner wall of the acid leaching box 200. When the friction roller 403 rotates, it drives the first gear 404 to rotate coaxially. When the first gear 404 rotates, it drives the second gear 405 to rotate in meshing. The eccentric wheel 406 provided at the end of the second gear 405 rotates to periodically press the top of the extension arm 411. The extension arm 411 drives the slide bar 408 to reciprocate in the vertical direction, so that the pressing plate 410 provided at the bottom of the slide bar 408 repeatedly presses the bottom of the acid leaching box 200 for many times, thereby accelerating the efficiency of crushing the waste particles deposited at the bottom of the acid leaching box 200. When the reaction is completed, the piston rod at the end of the cylinder 202 under the acid immersion box 200 is controlled to rotate the acid immersion box 200 along the rotating shaft 201 to an angle of 30 degrees with the horizontal plane, and the output end of the control motor 301 drives the screw rod 302 to rotate. When the screw rod 302 rotates, it drives the moving plate 401 to move. During the movement, the moving plate 401 drives the friction roller 403 to roll on the inner wall of the acid immersion box 200. During the rolling process, the acid immersion box 200 drives the first gear 404 to rotate. When the first gear 404 rotates, it drives the second gears provided on both sides above. 405 meshes and rotates, and when the second gear 405 rotates, it drives the eccentric wheel 406 to rotate coaxially. When the eccentric wheel 406 rotates, it periodically squeezes the extension arm 411 provided below. When the extension arm 411 is squeezed by the eccentric wheel 406, the extension arm 411 drives the slide bar 408 to move downward in the vertical direction, so that the pressing plate 410 provided at the bottom of the slide bar 408 squeezes the unreacted waste particles at the bottom of the acid leaching box 200, so that the acid solution adsorbed in the waste is quickly discharged from the filter port, thereby improving the extraction efficiency of the NdFeB waste; When the lead screw 302 drives the main gear 305 to rotate, the main gear 305 drives the gear rod 501 to mesh and rotate. When the gear rod 501 rotates, it drives the bevel gear 502 to mesh and rotate. When the gear rod 501 rotates, it can drive the fan blade 503 to accelerate the rotation to blow air to the outside of the acid immersion box 200, so that the generated acid mist flows from the fan blade 503 to the inside of the adsorption box 504, thereby avoiding the overflow of the acid mist and avoiding safety hazards caused by inhalation by personnel.

[0029] 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 by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A NdFeB waste acid leaching purification device, characterized in that: The invention comprises a support base (100), a ball mill (101) is arranged above the support base (100), the ball mill (101) is used for crushing and grinding NdFeB waste, a bellows (102) is arranged at the output end of the ball mill (101), an acid immersion box (200) is arranged at the end of the bellows (102), an acid solution is contained in the acid immersion box (200), a rotating shaft (201) is arranged between the acid immersion box (200) and the support base (100), cylinders (202) are arranged on both sides of the rotating shaft (201), the length of the output end of the cylinder (202) is controlled to adjust the horizontal position of the acid immersion box (200), a mixing assembly (300) is arranged inside the acid immersion box (200), and the mixing assembly (300) is used to The NdFeB powder soaked in acid in an acid leaching box (200) is stirred to make the powder mixed evenly. The surface of the mixing component (300) is provided with an extrusion component (400). When the mixing component (300) stirs the inside of the acid leaching box (200), the extrusion component (400) extrude and crush the large-grained NdFeB waste material deposited at the bottom of the acid leaching box (200). At the same time, after the mixing is completed, the extrusion component (400) extrude the remaining waste residue to accelerate the elements dissolved in the acid solution to flow out from the filter port at the end of the acid leaching box (200). The top of the acid leaching box (200) is provided with a mist suction component (500). The mist suction component (500) is used to purify the acid mist generated in the acid leaching box (200).

2. The NdFeB waste acid leaching and purification device according to claim 1, characterized in that: The mixing assembly (300) comprises a motor (301) arranged at one side of the acid immersion tank (200), a screw rod (302) being arranged at the output end of the motor (301), a transmission shaft (303) being arranged on the surface and both sides below the screw rod (302), a stirring rod (304) being arranged at the end of the transmission shaft (303), and the transmission shafts (303) being connected via a transmission belt.

3. The NdFeB waste acid leaching and purification device according to claim 2, characterized in that: The stirring rods (304) are symmetrically arranged inside the acid leaching box (200), and when the transmission shafts (303) at the ends of the stirring rods (304) are driven by the transmission belt to rotate, the stirring rods (304) rotate in opposite directions to stir the inside of the acid leaching box (200).

4. The NdFeB waste acid leaching and purification device according to claim 2, characterized in that: An extrusion assembly (400) is provided on the surface of the screw rod (302), and when the screw rod (302) rotates, it drives the extrusion assembly (400) to reciprocate in a horizontal direction, and the extrusion assembly (400) is used to crush the NdFeB waste particles that have settled to the bottom of the acid leaching tank (200).

5. The NdFeB waste acid leaching and purification device according to claim 4, characterized in that: The extrusion assembly (400) includes a movable plate (401) arranged on the surface of the screw rod (302), fixed frames (402) are arranged on both sides of the movable plate (401), a column (407) is arranged at the bottom of the fixed frame (402), a sliding groove is opened on the side wall of the column (407), a sliding rod (408) is slidably arranged on the inner wall of the column (407), extension arms (411) are arranged on both sides of the sliding rod (408), a compression spring (409) is arranged between the column (407) and the sliding rod (408), and a pressure plate (410) is arranged at the bottom of the sliding rod (408).

6. The NdFeB waste acid leaching and purification device according to claim 5, characterized in that: The bottom of the pressing plate (410) is arc-shaped, and when the extension arm (411) is pressed to drive the slide bar (408) to move downward in a vertical direction, the pressing plate (410) at the end of the slide bar (408) crushes the NdFeB waste particles precipitated at the bottom of the acid leaching box (200).

7. The NdFeB waste acid leaching and purification device according to claim 6, characterized in that: A friction roller (403) is provided inside the fixed frame (402), and the friction roller (403) slides against the side wall of the acid immersion box (200). A first gear (404) is provided on the top of the friction roller (403), and second gears (405) are provided on both sides above the first gear (404). An eccentric wheel (406) is provided at the end of the second gear (405), and when the second gear (405) drives the eccentric wheel (406) to rotate, the top of the extension arm (411) is squeezed.

8. The NdFeB waste acid leaching and purification device according to claim 2, characterized in that: A main gear (305) is provided at the end of the screw rod (302), and a mist absorbing assembly (500) is provided above the main gear (305). The mist absorbing assembly (500) is used to purify acid mist generated by the acidification reaction.

9. The NdFeB waste acid leaching and purification device according to claim 8, characterized in that: The mist suction component (500) comprises a gear rod (501) arranged above the main gear (305); a bevel gear (502) is arranged at the end of the gear rod (501); a fan blade (503) is arranged above the bevel gear (502); when the bevel gear (502) rotates, the fan blade (503) is driven to rotate coaxially; an adsorption box (504) is arranged above the fan blade (503); air is blown to the outside through the fan blade (503), so that the acid mist enters the adsorption box (504) for purification.

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