A neodymium iron boron waste acid leaching and purification device

Abstract

The present invention relates to the technical field of acid leaching and purification of neodymium iron boron, and specifically, to an acid leaching and purification device for neodymium iron boron waste. It includes a support base, above which a ball mill is provided. The ball mill is used to crush and grind the neodymium iron boron waste. A mixing component is arranged inside the acid leaching tank. When the present invention drives the stirring rod to rotate to stir the acidic solution by the rotation of the lead screw, the rotation of the lead screw drives the moving plate to move horizontally. The moving 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 tank. 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 meshingly. 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 sliding rod to reciprocate vertically, so that the pressing plate provided at the bottom of the sliding rod presses the bottom of the acid leaching tank repeatedly, accelerating the efficiency of crushing the waste particles deposited at the bottom of the acid leaching tank.

Description

Technical Field

[0001] The present invention relates to the technical field of acid leaching and purification of neodymium iron boron, and specifically, to an acid leaching and purification device for neodymium iron boron waste. Background Art

[0002] Neodymium iron boron is a kind of magnet, which is the permanent magnet with the second highest magnetism only after holmium magnet at absolute zero temperature nowadays, and is also the most commonly used rare earth magnet. A large amount of waste will be generated during the production of neodymium iron boron. The waste contains a large amount of valuable components such as praseodymium and neodymium. Therefore, the recycling of rare earths in neodymium iron boron waste has great economic significance.

[0003] Regarding the purification device, there are many existing technologies, for example:

[0004] Chinese Patent Publication No. CN114427042A discloses a separation device for extracting high-purity rare earth oxides from neodymium iron boron waste, including a chassis. A limiting mechanism is fixedly installed on the top of the chassis, a first vertical plate is fixedly installed on the top of the limiting mechanism, and a first fixing block is fixedly installed on the right end of the first vertical plate. By setting a roller, teeth and a grinding wheel, due to the operation of the first motor, the roller will be driven to rotate through the teeth, so that the neodymium iron boron waste is ground by the grinding wheel inside the roller, and the oxide layer on the outer layer of the neodymium iron boron waste is ground into powder and falls off. Compared with the traditional device, this device grinds the oxide layer by grinding, so that after the oxide layer is ground into powder and separated from the neodymium iron boron waste, the internal neodymium iron boron waste can be fully contacted with oxygen and undergo an oxidation reaction.

[0005] However, in the actual use process, there are still some problems:

[0006] At present, in the process of traditional purification devices, when neodymium iron boron waste is crushed by a ball mill, there are still some larger particles put into the acid leaching tank, resulting in insufficient reaction between the acid solution and them. At the same time, after the acid leaching is completed, the acid solution will remain in the unreacted waste, resulting in waste of some acid solutions dissolved with metal ions.

[0007] In view of this, we propose an acid leaching and purification device for neodymium iron boron waste. Summary of the Invention

[0008] The purpose of the present invention is to provide an acid leaching and purification device for neodymium iron boron waste to solve the problems raised in the above background art.

[0009] To achieve the above object, the object of the present invention is to provide a neodymium iron boron waste acid leaching and purification device, including a support base. Above the support base, there is a ball mill, which is used to crush and grind the neodymium iron boron waste. The output end of the ball mill is provided with a corrugated pipe, and the end of the corrugated pipe is provided with an acid leaching tank. An acidic solution is contained in the acid leaching tank. Between the acid leaching tank and the support base, there is a rotating shaft, and on both sides of the rotating shaft, there are cylinders. By controlling the length of the output end of the cylinders, the horizontal position of the acid leaching tank can be adjusted. Inside the acid leaching tank, there is a mixing component, which is used to stir the neodymium iron boron powder leached with acid in the acid leaching tank to make the powder mix evenly. On the surface of the mixing component, there is an extrusion component. During the process of stirring the inside of the acid leaching tank by the mixing component, the extrusion component extrudes and crushes the large particle neodymium iron boron waste precipitated at the bottom of the acid leaching tank. At the same time, after the mixing is completed, the residual waste residue is extruded by the extrusion component, so that the elements dissolved in the acidic solution are accelerated to flow out from the filter port at the end of the acid leaching tank. Above the acid leaching tank, there is a mist absorption component, which is used to purify the acid mist generated in the acid leaching tank.

[0010] As a further improvement of this technical solution, the mixing component includes a motor arranged on one side of the acid leaching tank. The output end of the motor is provided with a lead screw. On the surface and both sides below the lead screw, there are transmission shafts. The end of the transmission shaft is provided with a stirring rod, and the transmission shafts are connected by a transmission belt.

[0011] As a further improvement of this technical solution, the stirring rods are symmetrically arranged inside the acid leaching tank. When the transmission belt drives the transmission shafts at the ends of the stirring rods to rotate, the stirring rods rotate in opposite directions to stir the inside of the acid leaching tank.

[0012] As a further improvement of this technical solution, the surface of the lead screw is provided with an extrusion component. When the lead screw rotates, it drives the extrusion component to reciprocate horizontally. The extrusion component is used to crush the neodymium iron boron waste particles precipitated at the bottom of the acid leaching tank.

[0013] As a further improvement of this technical solution, the extrusion component includes a moving plate arranged on the surface of the lead screw. On both sides of the moving plate, there are fixed frames. At the bottom of the fixed frame, there is a column cylinder. A chute is opened on the side wall of the column cylinder. A sliding rod is slidably arranged inside the column cylinder. On both sides of the sliding rod, there are extension arms. A compression spring is arranged between the column cylinder and the sliding rod. At the bottom of the sliding rod, there is a pressing plate.

[0014] As a further improvement of this technical solution, the bottom of the pressing plate is arc-shaped. When pressing the extension arm to drive the sliding rod to move downward in the vertical direction, the pressing plate at the end of the sliding rod crushes the neodymium iron boron waste particles precipitated at the bottom of the acid leaching tank.

[0015] As a further improvement of the technical solution, a friction roller is provided inside the fixed frame. The friction roller slides along the side wall of the acid leaching tank. A first gear is provided at the top of the friction roller. Second gears are provided on both sides above the first gear. An eccentric wheel is provided at the end of the second gear. When the second gear drives the eccentric wheel to rotate, the top of the extension arm is squeezed.

[0016] As a further improvement of the technical solution, a main gear is provided at the end of the screw rod. A mist absorption component is provided above the main gear. The mist absorption component is used to purify the acid mist generated by the acidification reaction.

[0017] As a further improvement of the technical solution, the mist absorption component includes a gear rod provided above the main gear. A bevel gear is provided at the end of the gear rod. A fan blade is provided above the bevel gear. When the bevel gear rotates, it drives the fan blade to rotate coaxially. An adsorption box is provided above the fan blade. By blowing air to the outside through the fan blade, the acid mist enters the adsorption box for purification.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In the neodymium iron boron waste acid leaching and purification device, the motor output end drives the screw rod to rotate. When the motor drives the screw rod to rotate, the transmission shaft provided below the screw rod drives the stirring rod to rotate through the transmission belt. When the stirring rods rotate relative to each other to mix the neodymium iron boron waste in the acidic solution, it avoids the safety hazard caused by splashing of the solution due to manual stirring. During the stirring process of the stirring rod, the waste particles can be fully contacted with the acid solution, thereby improving the reaction speed between the acidic solution and the waste.

[0020] 2. In the neodymium iron boron waste acid leaching and purification device, the screw rod rotates to drive the moving plate to move horizontally. The moving plate drives the fixed frame to move. The friction roller provided at the end of the fixed frame always moves along the inner wall of the acid leaching tank. 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 meshingly. 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 sliding rod to reciprocate vertically. Thus, the pressing plate provided at the bottom of the sliding rod presses the bottom of the acid leaching tank repeatedly, accelerating the efficiency of crushing the waste particles deposited at the bottom of the acid leaching tank.

[0021] 3. In the neodymium iron boron waste acid leaching and purification device, by controlling the piston rod at the end of the air cylinder below the acid leaching tank, the acid leaching tank is rotated along the rotating shaft to an angle of 30 degrees with the horizontal plane. The output end of the motor is controlled to drive the lead screw to rotate. When the lead screw rotates, it drives the moving plate to move. During the movement of the moving plate, the friction roller is driven to roll on the inner wall of the acid leaching tank. During the rotation of the acid leaching tank, 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 gears rotate, the eccentric wheels are driven to rotate coaxially. When the eccentric wheels rotate, they periodically squeeze the extension arms provided below. When the extension arms are squeezed by the eccentric wheels, the extension arms drive the sliding rods to move downward in the vertical direction, so that the pressing plates provided at the bottoms of the sliding rods squeeze the unreacted waste particles at the bottom of the acid leaching tank, and the acidic solution adsorbed in the waste is quickly discharged from the filtering ports, thereby improving the extraction efficiency of the neodymium iron boron waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is the structural schematic diagram of the ball mill of the present invention;

[0024] Figure 3 is the structural schematic diagram of the acid leaching tank of the present invention;

[0025] Figure 4 is the cross-sectional view of the acid leaching tank of the present invention;

[0026] Figure 5 is the structural schematic diagram of the mixing assembly of the present invention;

[0027] Figure 6 is the structural schematic diagram of the stirring rod of the present invention;

[0028] Figure 7 is the cross-sectional view of the extrusion assembly of the present invention;

[0029] Figure 8 For the present invention Figure 7 cross-sectional view of the moving assembly at position A.

[0030] The meanings of the various reference numerals in the figures are as follows:

[0031] 100, support base; 101, ball mill; 102, bellows;

[0032] 200, acid leaching tank; 201, rotating shaft; 202, air cylinder;

[0033] 300, mixing assembly; 301, motor; 302, lead screw; 303, transmission shaft; 304, stirring rod; 305, main gear;

[0034] 400. Extrusion assembly; 401. Moving plate; 402. Fixed frame; 403. Friction roller; 404. First gear; 405. Second gear; 406. Eccentric wheel; 407. Cylindrical barrel; 408. Slide bar; 409. Compression spring; 410. Pressing plate; 411. Extension arm

[0035] 500. Mist absorption assembly; 501. Gear rod; 502. Bevel gear; 503. Fan blade; 504. Adsorption box Detailed implementation manners

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] The purpose of this embodiment is to provide a neodymium iron boron waste acid leaching and purification device. Refer to Figures 1-8As 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, and the horizontal position of the acid immersion box 200 is adjusted by controlling the length of the output end of the cylinder 202, 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.

[0039] 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:

[0040] 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;

[0041] When the grinding of neodymium iron boron waste is completed, the waste particle powder is transported to the inside of the acid leaching tank 200 through the output end of the ball mill 101 for acid purification. Since the inside of the acid leaching tank 200 is an acidic solution and has certain corrosiveness, therefore, the output end of the motor 301 drives the lead screw 302 to rotate. When the motor 301 drives the lead screw 302 to rotate, the transmission shaft 303 provided below the lead screw 302 drives the stirring rod 304 to rotate through the transmission belt. When the stirring rod 304 rotates relatively to mix the neodymium iron boron waste in the acidic solution, it avoids the safety hazard caused by the splashing of the solution due to manual stirring. 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 between the acidic solution and the waste.

[0042] When the neodymium iron boron waste is transported from the output end of the ball mill 101 to the inside of the acid leaching tank 200, some of the waste still remains in larger particles during the ball milling process, resulting in insufficient reaction during the acid leaching process. Therefore, an extrusion assembly 400 is provided on the surface of the lead screw 302. When the lead screw 302 rotates, it drives the extrusion assembly 400 to move reciprocally in the horizontal direction. The extrusion assembly 400 is used to crush the neodymium iron boron waste particles deposited at the bottom of the acid leaching tank 200. The extrusion assembly 400 includes a moving plate 401 provided on the surface of the lead screw 302. Fixed frames 402 are provided on both sides of the moving plate 401. A column cylinder 407 is provided at the bottom of the fixed frame 402. A chute is provided on the side wall of the column cylinder 407. A sliding rod 408 is slidably provided on the inner wall of the column cylinder 407. Extension arms 411 are provided on both sides of the sliding rod 408. A compression spring 409 is provided between the column cylinder 407 and the sliding rod 408. A pressing plate 410 is provided at the bottom of the sliding rod 408. The bottom of the pressing plate 410 is arc-shaped. When pressing the extension arm 411 to drive the sliding rod 408 to move downward in the vertical direction, the pressing plate 410 at the end of the sliding rod 408 crushes the neodymium iron boron waste particles deposited at the bottom of the acid leaching tank 200. When the motor 301 drives the lead screw 302 to rotate, the moving plate 401 provided on the surface of the lead screw 302 moves in the horizontal direction. During the movement of the moving plate 401, it drives the fixed frame 402 to move. During the movement of the fixed frame 402, by pressing the extension arm 411, it drives the sliding rod 408 to move in the vertical direction, so that the pressing plate 410 provided at the bottom of the sliding rod 408 presses and crushes the larger waste particles deposited at the bottom of the acid leaching tank 200. Since the bottom of the pressing plate 410 is arc-shaped and the contact surface between the pressing 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 large, and it is easier to crush the waste particles to accelerate the reaction speed between the waste and the acidic solution.

[0043] During the acid leaching process, in order to break up the waste particles deposited at the bottom of the acid leaching tank 200 by the pressing plate 410 multiple times, a friction roller 403 is provided inside the fixed frame 402. The friction roller 403 slides along the side wall of the acid leaching tank 200. A first gear 404 is provided at the top of the friction roller 403. On both sides above the first gear 404, there are second gears 405. 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 lead screw 302 rotates to drive the stirring rod 304 to rotate and stir the acidic solution, the lead screw 302 rotates to drive the moving plate 401 to move horizontally. The moving plate 401 drives the fixed frame 402 to move. The friction roller 403 provided at the end of the fixed frame 402 always moves along the inner wall of the acid leaching 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 meshingly. 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 vertically. Thus, the pressing plate 410 provided at the bottom of the slide bar 408 presses the bottom of the acid leaching tank 200 repeatedly, accelerating the efficiency of breaking up the waste particles deposited at the bottom of the acid leaching tank 200;

[0044] Meanwhile, when the purification is completed, the acidic solution is discharged from the filter opening on the side of the acid leaching tank 200 for treatment to extract rare earth. Since there is waste that has not reacted with the acidic solution accumulated at the bottom inside the acid leaching tank 200, when taking out the acidic solution, some solution remains at the bottom of the acid leaching tank 200 where the waste is accumulated. It takes a relatively long time to completely take out the remaining solution inside it. Therefore, by controlling the piston rod at the end of the air cylinder 202 below the acid leaching tank 200, the acid leaching tank 200 is rotated along the rotating shaft 201 to an angle of 30 degrees with the horizontal plane. The output end of the control motor 301 drives the lead screw 302 to rotate. When the lead screw 302 rotates, it drives the moving plate 401 to move. During the movement of the moving plate 401, it drives the friction roller 403 to roll on the inner wall of the acid leaching tank 200. During the rolling process, the acid leaching tank 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 rotate meshingly. 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 vertically. Thus, 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 tank 200, enabling the acidic solution adsorbed in the waste to be quickly discharged from the filter opening, thereby improving the extraction efficiency of the neodymium iron boron waste.

[0045] During the acid leaching process, acid mist is easily generated during the reaction. When the acid mist drifts into the environment, it can easily cause environmental pollution and discomfort to personnel. Therefore, a main gear 305 is provided at the end of the lead screw 302, and a mist suction assembly 500 is provided above the main gear 305. The mist suction assembly 500 is used to purify the acid mist generated by the acidification reaction. The mist suction assembly 500 includes a gear rod 501 provided 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, it drives the fan blade 503 to rotate coaxially. An adsorption box 504 is provided above the fan blade 503. By blowing air to the outside through the fan blade 503, the acid mist enters the inside of the adsorption box 504 for purification. When the lead screw 302 drives the main gear 305 to rotate, the main gear 305 drives the gear rod 501 to rotate meshingly. When the gear rod 501 rotates, it drives the bevel gear 502 to rotate meshingly. Since the tooth ratio of the gear at the end of the gear rod 501 to the tooth pattern of the bevel gear 502 is 3:1, when the gear rod 501 rotates, it can drive the fan blade 503 to rotate at an accelerated speed to blow air to the outside of the acid leaching tank 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 a housing and an adsorbent filled inside. The housing is usually made of corrosion-resistant material, and the adsorbent is calcium hydroxide, thus avoiding the overflow of acid mist and the potential safety hazard of personnel inhaling it into the body.

[0046] During specific use, the neodymium iron boron waste is put into the ball mill 101 for crushing, and the waste particle powder is transported to the inside of the acid leaching tank 200 through the output end of the ball mill 101 for acidification and purification. The output end of the motor 301 drives the lead screw 302 to rotate. When the motor 301 drives the lead screw 302 to rotate, the transmission shaft 303 provided below the lead screw 302 drives the stirring rod 304 to rotate through the transmission belt. When the stirring rod 304 rotates relatively to mix the neodymium iron boron waste in the acidic solution, it avoids the potential safety hazard of solution splashing caused by manual agitation. During the agitation process of the stirring rod 304, the waste particles can be fully contacted with the acid solution, thereby increasing the reaction rate between the acidic solution and the waste. When the lead screw 302 rotates to drive the stirring rod 304 to stir the acidic solution, the lead screw 302 rotates to drive the moving plate 401 to move horizontally. The moving 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 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 meshingly. 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 vertically, so that the pressing plate 410 provided at the bottom of the slide bar 408 presses the bottom of the acid leaching tank 200 repeatedly, accelerating the efficiency of crushing the waste particles deposited at the bottom of the acid leaching tank 200;

[0047] When the reaction is completed, by controlling the piston rod at the end of the air cylinder 202 below the acid leaching tank 200, the acid leaching tank 200 is rotated along the rotating shaft 201 to an angle of 30 degrees with the horizontal plane. Control the output end of the motor 301 to drive the lead screw 302 to rotate. When the lead screw 302 rotates, it drives the moving plate 401 to move. During the movement of the moving plate 401, it drives the friction roller 403 to roll on the inner wall of the acid leaching tank 200. During the rolling process, the acid leaching tank 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 gears 405 rotate, they drive 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 sliding rod 408 to move downward in the vertical direction, so that the pressing plate 410 provided at the bottom of the sliding rod 408 squeezes the unreacted waste particles at the bottom of the acid leaching tank 200, and the acidic solution adsorbed in the waste is quickly discharged from the filter port, thereby improving the extraction efficiency of the neodymium iron boron waste;

[0048] 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 rotate at an accelerated speed to blow air outside the acid leaching tank 200, so that the generated acid mist flows from the fan blade 503 into the adsorption box 504, thereby avoiding the overflow of acid mist and preventing personnel from inhaling it and causing potential safety hazards.

[0049] 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 the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended 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 leaching box (200) is arranged at the end of the bellows (102), an acid solution is contained in the acid leaching box (200), a rotating shaft (201) is arranged between the acid leaching box (200) and the support base (100), cylinders (202) are arranged on both sides of the rotating shaft (201), and the horizontal position of the acid leaching box (200) is adjusted by controlling the length of the output end of the cylinder (202), a mixing assembly (300) is arranged inside the acid leaching box (200), and the mixing assembly (300) Used to stir the acid-soaked NdFeB powder in the acid leaching box (200) so that the powder is mixed evenly, the surface of the mixing component (300) is provided with an extrusion component (400), and 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), and at the same time, after the mixing is completed, the extrusion component (400) extrude the remaining waste residue so that the elements dissolved in the acid solution are accelerated to flow out from the filter port at the end of the acid leaching box (200), and the top of the acid leaching box (200) is provided with a mist absorbing component (500), and the mist absorbing component (500) is used to purify the acid mist generated in the acid leaching box (200); The mixing assembly (300) comprises a motor (301) arranged on one side of the acid immersion tank (200), a screw rod (302) being arranged at the output end of the motor (301), the extrusion assembly (400) being arranged on the surface of the screw rod (302), the extrusion assembly (400) comprising a movable plate (401) being arranged on the surface of the screw rod (302), fixed frames (402) being arranged on both sides of the movable plate (401), a column (407) being arranged at the bottom of the fixed frame (402), a sliding groove being arranged on the side wall of the column (407), a sliding rod (408) being slidably arranged on the inner wall of the column (407), and extension arms (408) being arranged on both sides of the sliding rod (408). 411), a compression spring (409) is provided between the column (407) and the slide bar (408), a pressure plate (410) is provided at the bottom of the slide bar (408), a friction roller (403) is provided inside the fixed frame (402), 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), 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 the second gear (405) drives the eccentric wheel (406) to rotate to squeeze the top of the extension arm (411).

2. The NdFeB waste acid leaching and purification device according to claim 1, characterized in that: Transmission shafts (303) are provided on the surface and both sides below the screw rod (302), stirring rods (304) are provided at the ends of the transmission shafts (303), and the transmission shafts (303) are connected via transmission belts.

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: When the screw rod (302) rotates, it drives the extrusion assembly (400) to reciprocate in the 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 1, 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).

6. 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.

7. The NdFeB waste acid leaching and purification device according to claim 6, characterized in that: The mist absorbing assembly (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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