Waste lithium battery regeneration system based on ultrasonic-assisted leaching structure

Abstract

The invention relates to the technical field of battery regeneration, and discloses a waste lithium battery regeneration system based on an ultrasonic-assisted leaching structure, which comprises a leaching part, the leaching part comprises a kettle body, the top end of the kettle body is hermetically connected with an upper gland, and the upper gland is rotatably connected with a rotating shaft through a hollow shaft fixed in the upper gland; the rotating shaft is provided with a stirring structure for uniformly mixing materials through a sliding chute formed in the bottom end of the rotating shaft; and generating ultrasonic waves. The waste lithium battery regeneration system based on the ultrasonic-assisted leaching structure can effectively solve the problems that in the prior art, part of waste lithium batteries are still kept in large blocks due to insufficient preliminary crushing, the crushed products of the waste lithium batteries sink to the bottom of a reaction kettle due to high density, materials are seriously stacked, and the waste lithium batteries cannot be recycled. The problems that the leaching efficiency is reduced and the metal recovery rate is low due to the fact that valuable metal in the large-particle lithium battery broken product is difficult to make full contact and react with a leaching agent are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery regeneration, and in particular to a waste lithium battery regeneration system based on an ultrasound-assisted leaching structure. Background Art

[0002] Leaching reactors are chemical equipment used to carry out leaching reactions. They are widely used in fields such as metallurgy, chemical engineering, and environmental protection, playing a particularly important role in metal extraction and resource recovery. The operating principle of a leaching reactor is to use a leaching agent to chemically react with the target component in the solid material, causing the target component to dissolve from the solid material into a solution, forming a leachate. This leachate can be used to recover valuable metals from waste lithium batteries and electronic waste.

[0003] In the existing technology, some waste lithium batteries remain in large blocks due to insufficient initial crushing. These waste lithium battery crushed products will sink to the bottom of the reactor due to their high density, resulting in serious material accumulation. The valuable metals inside the large-particle lithium battery crushed products are difficult to fully contact and react with the leaching agent, resulting in reduced leaching efficiency and low metal recovery rate. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a waste lithium battery regeneration system based on an ultrasonic-assisted leaching structure, which can effectively solve the problem in the prior art that some waste lithium batteries remain in large blocks due to insufficient initial crushing. These waste lithium battery crushed products will sink to the bottom of the reactor due to their high density, resulting in serious material accumulation. The valuable metals inside the large-particle lithium battery crushed products are difficult to fully contact and react with the leaching agent, resulting in reduced leaching efficiency and low metal recovery rate.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a waste lithium battery regeneration system based on an ultrasound-assisted leaching structure, comprising: The leaching part includes a kettle body, the top of the kettle body is sealed with an upper gland, the upper gland is rotatably connected to a rotating shaft via a hollow shaft fixed therein, and the rotating shaft is provided with a stirring structure for mixing materials through a chute provided at its bottom end; An ultrasonic generator, which is fixedly mounted on the bottom end of the kettle; The stirring structure includes a connecting shaft, which is slidably connected to the inner wall of the rotating shaft via a flat key provided on the outer surface of the connecting shaft, a rotating rod is fixedly connected to the outer surface of the rotating shaft, and a grinding ball is rotatably connected to the outer surface of the rotating rod; Wherein, the bottom end of the hollow shaft is provided with a lifting member which can be used to move the grinding balls up and down.

[0006] Furthermore, the lifting member includes a spring arranged on the upper surface of the connecting shaft, the end of the spring away from the connecting shaft is connected to the top of the inner wall of the slide groove, a limiting groove is provided on the circumferential outer surface of the connecting shaft, and the hollow shaft is fixedly connected to the L-shaped rod at its bottom end and is provided with a reversing member that fits with the inner wall of the limiting groove. Two L-shaped rods are provided and are symmetrically distributed with the connecting shaft as the center.

[0007] Furthermore, the bottom end of the inner wall of the kettle body adopts an annular concave arc surface design that fits the outer surface of the grinding ball.

[0008] Furthermore, a scraper that fits the outer circumference of the grinding ball is fixedly connected to one side of the outer circumference of the rotating rod close to the hollow shaft.

[0009] Furthermore, three grinding balls are provided and distributed in a circular array with the connecting axis as the central axis. The scraper adopts an inclined design, and the outer end of the scraper away from the grinding balls is thinner.

[0010] Furthermore, the outer circumferential surface of the rotating rod is sleeved with a gear fixedly connected to the end of the grinding ball away from the connecting shaft, and the inner circumferential wall of the kettle body is fixedly connected to a gear ring meshing with the outer surface of the gear.

[0011] Furthermore, the reversing member includes a rotating block rotatably connected to the bottom end of the L-shaped rod, and the rotating block is rotatably connected to the inside of the L-shaped rod through an axis rod arranged inside it. The end of the rotating block close to the connecting shaft adopts an arc surface design that fits the inner wall of the limit groove, and a limit plate fixedly connected to the inside of the L-shaped rod is provided on one side of the rotating block.

[0012] Furthermore, the outer circumferential surface of the shaft is sleeved with a torsion spring connected to the inside of the L-shaped rod.

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with a stirring structure and a lifting member. When the initial crushing of waste lithium battery crushed products is insufficient and still in the form of large fragments, the grinding balls initially fit the bottom of the inner wall of the kettle, which can more effectively cover the corners and edge areas of the kettle, reducing material accumulation and stirring dead angles. When the inner wall of the inclined groove in the limit groove contacts the rotating block, the stirring structure is driven to rotate and rise. When the inner wall of the vertical groove in the limit groove contacts the rotating block, it rapidly descends under the action of the spring and the gravity of the grinding balls, and can hammer the part settled at the bottom of the kettle, so that the block-shaped lithium battery crushed products are converted into large particles. The rotation of the scraper ensures that the lithium battery crushed products and the leaching agent are fully mixed. As the rotating shaft continues to rotate, the grinding balls rotate around the rotating rod at the bottom of the kettle, and can use shear force to quickly crush large particles into smaller particles, increasing the contact area with the leaching agent, improving the leaching effect, and thereby increasing the metal recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0015] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the kettle body according to an embodiment of the present invention; Figure 3 This is a schematic structural diagram of the upper gland, rotating shaft, and grinding balls according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of the stirring structure, lifting member and hollow shaft according to an embodiment of the present invention; Figure 5 For the embodiment of the present invention Figure 3 A schematic diagram of the partially enlarged structure at point A in the middle; Figure 6 Schematic diagram of the cross-sectional structure of the connecting shaft according to an embodiment of the present invention; Figure 7 For the embodiment of the present invention Figure 6 A schematic diagram of the structure with a partial enlargement at point B in the middle; Figure 8 Schematic diagram of the structure of the L-shaped rod and the reversing member according to an embodiment of the present invention.

[0016] The numbers in the figure represent: 1. Leaching part; 11. Kettle body; 12. Upper pressure cover; 13. Hollow shaft; 14. Rotating shaft; 15. Stirring structure; 151. Connecting shaft; 1511. Flat key; 152. Rotating rod; 153. Grinding ball; 154. Scraper; 155. Gear; 156. Gear ring; 16. Lifting part; 161. Spring; 162. Limiting groove; 163. L-shaped rod; 164. Reversing part; 1641. Rotating block; 1642. Limiting plate; 1643. Torsion spring; 2. Ultrasonic generator. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example:

[0020] See also Figures 1-8 The present invention provides a technical solution: a waste lithium battery regeneration system based on an ultrasonic-assisted leaching structure, comprising: The leaching part 1 includes a kettle body 11, the top of the kettle body 11 is sealed with an upper gland 12, the upper gland 12 is rotatably connected to a rotating shaft 14 via a hollow shaft 13 fixed therein, and the rotating shaft 14 is provided with a stirring structure 15 for mixing materials through a chute provided at its bottom end; The ultrasonic generator 2 is fixedly mounted on the bottom end of the kettle body 11; The stirring structure 15 includes a connecting shaft 151, which is slidably connected to the inner wall of the rotating shaft 14 via a flat key 1511 provided on its outer surface. A rotating rod 152 is fixedly connected to the outer surface of the connecting shaft 151, and a grinding ball 153 is rotatably connected to the outer surface of the rotating rod 152. The bottom end of the hollow shaft 13 is provided with a lifting member 16 for moving the grinding balls 153 up and down.

[0021] The lifting member 16 includes a spring 161 arranged on the upper surface of the connecting shaft 151. The end of the spring 161 away from the connecting shaft 151 is connected to the top of the inner wall of the slide groove. A limiting groove 162 is provided on the circumferential outer surface of the connecting shaft 151. The hollow shaft 13 is fixedly connected to the bottom end of the L-shaped rod 163 and is provided with a reversing member 164 that fits with the inner wall of the limiting groove 162. Two L-shaped rods 163 are provided and are symmetrically distributed with the connecting shaft 151 as the center.

[0022] The bottom end of the inner wall of the kettle body 11 adopts an annular concave arc surface design that fits the outer surface of the grinding ball 153.

[0023] A scraper 154 that fits the outer surface of the grinding ball 153 is fixedly connected to the outer surface of the rotating rod 152 near the hollow shaft 13 .

[0024] Three grinding balls 153 are provided and distributed in a circular array around the connecting shaft 151 . The scraper 154 is designed to be inclined, and the outer end of the scraper 154 away from the grinding balls 153 is thinner.

[0025] The outer surface of the rotating rod 152 is sleeved with a gear 155 fixedly connected to the end of the grinding ball 153 away from the connecting shaft 151 , and the inner wall of the circumference of the kettle body 11 is fixedly connected to a gear ring 156 meshing with the outer surface of the gear 155 .

[0026] Reversing member 164 includes a rotating block 1641 rotatably connected to the bottom end of L-shaped rod 163. Rotating block 1641 is rotatably connected to the interior of L-shaped rod 163 via a shaft disposed within it. The end of rotating block 1641, closest to connecting shaft 151, features a curved surface that aligns with the inner wall of retaining groove 162. A retaining plate 1642, fixedly connected to the interior of L-shaped rod 163, is disposed on one side of rotating block 1641. Retaining groove 162 comprises three sections: a vertical groove, a horizontal groove, and an inclined groove, each section having two sections. The vertical, horizontal, and inclined grooves are interconnected and arranged in a circular pattern around the outer surface of rotating shaft 14.

[0027] The outer circumferential surface of the shaft is sleeved with a torsion spring 1643 connected to the inside of the L-shaped rod 163.

[0028] During actual use, the waste lithium batteries are disassembled and crushed, and the pre-treated lithium battery crushed products are fed into the kettle body 11 through the feed port connected to the inside of the upper pressure cover 12 through a conveying device, and a suitable leaching agent is added to the kettle body 11 through a pipeline and a metering device. The larger pieces of waste lithium battery crushed products will entangle with each other and settle at the bottom of the inner wall of the kettle body 11, and will not be in sufficient contact with the leaching agent, resulting in poor leaching effect and low metal recovery rate.

[0029] The process of leaching reaction between crushed waste lithium batteries and leaching agent: After the waste lithium battery crushing products and the leaching agent enter the interior of the kettle body 11, appropriate parameters such as reaction time, reaction temperature, and reaction pressure are selected according to the reaction system and process requirements. A hollow shaft 13 is fixedly connected to the center of the upper gland 12, and the bottom end of the hollow shaft 13 extends into the interior of the kettle body 11. The interior of the hollow shaft 13 is rotatably connected to the rotating shaft 14 via a bearing. A drive motor is provided on the top of the upper gland 12, and the rotating shaft 14 is transmission-connected to the drive motor. The ultrasonic generator 2 at the bottom end of the kettle body 11 continuously applies ultrasonic mechanical vibrations to the leachate and the lithium battery crushing products. This can keep the solid particles in the waste lithium batteries in a well-dispersed state in the leachate, prevent them from agglomerating in the liquid, and ensure that each particle can fully contact the leaching agent, thereby improving the efficiency and effect of the leaching reaction.

[0030] Start the driving motor, and the output end of the driving motor is connected to the top of the rotating shaft 14, driving the rotating shaft 14 to rotate inside the hollow shaft 13 at a slower speed. Viewed from the top of the upper pressure cover 12, the rotating shaft 14 and the connecting shaft 151 rotate counterclockwise. During the counterclockwise rotation, since a limiting plate 1642 is provided on the side of the rotating block 1641 close to the horizontal groove, the rotating block 1641 cannot rotate when the horizontal groove and the inclined groove are in contact with the outer surface of the rotating block 1641. The L-shaped rod 163, the limiting plate 1642 and the rotating block 1641 form a whole, which can drive the stirring structure 15 to move up and down.

[0031] Two symmetrically arranged L-shaped rods 163 are fixedly connected to the bottom end of the hollow shaft 13. The ends of the L-shaped rods 163, facing away from the hollow shaft 13, are in contact with the inner wall of the limiting groove 162. During the leaching reaction, the kettle body 11, the upper gland 12, the hollow shaft 13, and the L-shaped rods 163 remain stationary. The bottom end of the rotating shaft 14 is provided with symmetrically arranged keyways, which communicate with the interior of the chute. The rotating shaft 14 engages with the flat key 1511 on the outer surface of the connecting shaft 151 through the keyway, transmitting torque to the connecting shaft 151, limiting rotational displacement of the two, and driving the connecting shaft 151 to rotate together.

[0032] The outer circumferential surface at the bottom end of the connecting shaft 151 is fixedly connected to a rotating rod 152. The outer surface of the rotating rod 152 is sleeved with a spherical grinding ball 153. The inner bottom of the inner wall of the kettle body 11 adopts an annular concave arc surface design that fits the outer surface of the grinding ball 153. Three grinding balls 153 are arranged in an array within the annular concave arc surface at the bottom of the kettle body 11. When the rotating shaft 14 rotates, it will drive the connecting shaft 151, the rotating rod 152, and the grinding balls 153 to rotate in sequence. The limiting groove 162 includes three parts: a vertical groove, a horizontal groove, and an inclined groove. Each part is provided with two parts. The vertical groove, horizontal groove, and inclined groove are internally connected to each other. The vertical groove, horizontal groove, and inclined groove are arranged in a circle around the outer surface of the rotating shaft 14.

[0033] In the initial state, the bottom end of L-shaped rod 163 is located at the intersection of the vertical and horizontal grooves in retaining groove 162. Spring 161, located within connecting shaft 151 and rotating shaft 14, is in an extended state (spring 161 is made of corrosion-resistant material, adaptable to the leaching agent environment). The lowest point of the bottom end of the circumferential outer surface of grinding ball 153 contacts the bottom of the inner wall of kettle body 11. When rotating shaft 14 drives connecting shaft 151 to rotate, retaining groove 162, defined on the circumferential outer surface of connecting shaft 151, rotates accordingly. The positional relationship between retaining groove 162 and rotating block 1641 changes from the initial state, where the top end of the vertical groove contacts the outer end of rotating block 1641, to the positional relationship where the interior of the horizontal groove contacts the outer end of rotating block 1641. At this time, the connecting shaft 151 is inside the horizontal groove, and under the action of the gravity of the grinding ball 153 and the elastic force of the spring 161, it maintains the horizontal state and rotates. The grinding ball 153 is always in contact with the bottom of the inner wall of the kettle body 11 during this process, and the lithium battery crushed products deposited at the bottom of the kettle body 11 are further crushed, so that the uncrushed lithium battery products are further squeezed and ground, the degree of crushing of the lithium battery crushed products is improved, the contact area with the leaching agent is increased, the leaching effect is better, and the metal recovery rate is improved.

[0034] As the grinding balls 153 rotate for a distance along the bottom of the inner wall of the kettle body 11, the contact position between the stopper groove 162 and the outer end of the L-shaped rod 163 reaches the intersection of the horizontal groove and the inclined groove. The rotating shaft 14 continues to rotate, and the inclined groove in the stopper groove 162 begins to contact the outer end of the rotating block 1641. As viewed from the top of the upper gland 12, the rotating shaft 14 and the connecting shaft 151 rotate counterclockwise. Because the inner wall of the stopper groove 162 on the outer surface of the connecting shaft 151 always contacts the outer end of the rotating block 1641, the rotating block 1641 remains stationary. Under the action of the stopper groove 162, the connecting shaft 151 gradually moves upward along the inner wall of the rotating shaft 14. The spring 161 inside the rotating shaft 14 and in contact with the top of the connecting shaft 151 begins to deform elastically. Accordingly, the grinding ball 153 moves upward through the rotating rod 152 under the action of the connecting shaft 151. At this time, the outer surface of the grinding ball 153 no longer contacts the bottom of the inner wall of the kettle body 11, and continues to move upward, and the distance between the two increases.

[0035] When the outer circumferential surface of the grinding balls 153 fits tightly against the bottom of the kettle 11 to crush and grind the waste lithium battery crushed products, a portion of the crushed lithium battery products is squeezed to the middle of the bottom of the kettle 11, out of the annular concave surface of the kettle 11. When the grinding balls 153 separate from the bottom of the kettle 11, the larger fragments of the crushed lithium battery products naturally flow toward the annular concave surface of the bottom of the kettle 11 due to the suction force of the water flow and the action of the annular concave surface, and are located at the lowest point of the kettle 11, which facilitates their next crushing and grinding. The smaller fragments float in the leaching agent and float upward.

[0036] As the inclined grooves in connecting shaft 151 contact the outer surface of rotating block 1641, both grinding balls 153 and scrapers 154 ascend and rotate around rotating shaft 14. Scrapers 154 are inclined, thinner at their top and thicker near their curved bottoms near grinding balls 153. This effectively scrapes away material adhering to the surfaces of grinding balls 153 while also stirring the leachate within kettle 11 as it rotates with connecting shaft 151. Due to the inclined design of scrapers 154, this process generates both axial and radial flows. The axial flow circulates the leachate vertically within kettle 11, allowing for sufficient exchange of material at the bottom and top. The radial flow causes the leachate to flow from the center of connecting shaft 151 toward the inner wall of kettle 11 and then back along the inner wall, forming a complex three-dimensional flow pattern. This can promote the thorough mixing of materials at different levels and regions, enhance the mixing effect of lithium battery crushed products and leaching agents at different heights, effectively avoid dead corners in stirring, and allow the materials in the entire kettle body 11 to participate in the stirring process. During this process, the spring 161 between the connecting shaft 151 and the rotating shaft 14 gradually begins to compress, and the distance between the bottom end of the inner wall of the chute in the rotating shaft 14 and the top end of the connecting shaft 151 gradually decreases.

[0037] As the rotating shaft 14 continues to rotate, the bottom of the inclined groove in the retaining groove 162 on the outer surface of the connecting shaft 151 contacts the outer surface of the rotating block 1641. At this time, the stirring structure 15 is about to reach the highest point within its travel range. The spring 161 is in a fully compressed state. When the intersection of the inclined groove and the vertical groove contacts the outer surface of the rotating block 1641, the retaining groove 162 loses the restraint of the rotating block 1641, the L-shaped rod 163, and the retaining plate 1642. Under the action of the elastic force of the spring 161 and the gravity of the grinding ball 153, the entire stirring structure 15 moves downward rapidly. The vertical groove moves from contacting the outer surface of the rotating block 1641 at the bottom to contacting the rotating block 1641 at the top, returning to the initial state. In the process of descending, the gear 155 on the outer end of the grinding ball 153 completes meshing with the teeth on the upper surface of the gear ring 156.

[0038] As the rotating shaft 14 continues to rotate, it transmits torque to the connecting shaft 151 via the flat key 1511, driving the stirring structure 15 to rotate within the kettle body 11. The grinding balls 153 engage with the gear ring 156 via the gear 155 at their side ends. While the three grinding balls 153 rotate around the connecting shaft 151, they also rotate around the rotating rod 152. During this process, the grinding balls 153 continuously rotate around the rotating rod 152 via the bearings, preventing the outer surfaces of the grinding balls 153 from contacting the crushed lithium battery particles and causing them to become stuck or pushed sideways. This ensures that a high friction force is continuously applied to the waste lithium batteries inside the annular concave surface at the bottom of the kettle body 11. As the grinding ball 153 rotates around the rotating rod 152, the contact point between its circumferential surface and the waste lithium batteries at the bottom constantly changes, which can continuously generate new friction. The grinding ball 153 will generate shear force on the lithium battery material during movement, just like pulling and cutting the lithium battery from multiple directions at the same time, which can quickly break larger particles into smaller particles, thereby improving the overall grinding efficiency.

[0039] The process of the rotating shaft 14 rotating in the reverse direction: After a period of impact, the internal lithium battery fragments have become granular. At this point, the drive motor drives the rotating shaft 14 to rotate in the opposite direction. That is, when viewed from the top of the upper gland 12, the rotating shaft 14 is rotating clockwise. As the connecting shaft 151 and the limiting groove 162 rotate together clockwise, the intersection of the horizontal and vertical grooves contacts the outer surface of the rotating block 1641. As the connecting shaft 151 continues to rotate clockwise, the inner side of the vertical groove aligns with the side of the rotating block 1641 near the limiting plate 1642 (the distance from the outer side of the limiting plate 1642, away from the L-shaped rod 163, to the inner wall of the limiting groove 162 is greater than the depth of the inner wall of the limiting groove 162). As the connecting shaft 151 continues to rotate, the rotating block 1641 rotates within the L-shaped rod 163, centering on the shaft, causing the internal torsion spring 1643 to deform.

[0040] After the rotating block 1641 rotates about ninety degrees, the side wall of the rotating block 1641 contacts the outer surface of the connecting shaft 151 and is no longer engaged in the inner part of the limiting groove 162. At this time, under the elastic force of the spring 161 and the gravity of the grinding ball 153, the rotating shaft 14 drives the stirring structure 15 to rotate horizontally. During this process, the bottom of the outer surface of the grinding ball 153 is always in contact with the inner wall of the kettle body 11, and the smaller lithium battery crushed products remaining in the annular concave arc surface at the bottom of the kettle body 11 are further finely ground, so that the powder distribution is more even and can flow smoothly into the leaching agent above the kettle body 11, thereby improving the metal recovery rate.

[0041] In summary, the device has the following advantages during use: Advantage 1: When the waste lithium battery crushed products are not initially crushed sufficiently and are still in the form of large fragments, the grinding balls 153 are used instead of the traditional stirring paddles. The lifting member 16 can hammer the part settled at the bottom of the kettle body 11, so that the block-shaped lithium battery crushed products are converted into large particles, and the scraper 154 rotates to fully mix the lithium battery crushed products and the leaching agent.

[0042] Advantage 2: When the stirring structure 15 is at the bottom, the grinding balls 153 are engaged with the gear ring 156 through the gear 155 provided at the outer end thereof, which can drive the grinding balls 153 to rotate around the rotating rod 152 at the bottom of the kettle body 11, and can use shear force to quickly break larger particles into smaller particles, increase the contact area with the leaching agent, significantly improve the leaching effect, and thus improve the metal recovery rate.

[0043] Advantage 3: The bottom of the inner wall of the kettle body 11 adopts an annular concave arc design that fits the outer surface of the grinding balls 153. This can more effectively cover the corners and edge areas of the kettle body 11, reducing material accumulation and mixing dead corners. The outer surface of the grinding balls 153 adopts a smooth design without complex edges and gaps. After the mixing is completed, it is not easy to leave residual materials, making it easy to clean. At the same time, it can reduce the entanglement problem caused by lithium battery fragments such as aluminum foil due to their good ductility. During the mixing process, the mechanical force exerted by the grinding balls 153 on the lithium battery crushed products floating in the leachate is relatively gentle, which can reduce the excessive crushing and damage of active substances, electrode materials, etc. floating in the leachate to a certain extent, which is conducive to maintaining the physical and chemical properties of the materials and facilitating subsequent processing and recycling.

[0044] Advantage 4: The inclined design of the scraper 154 causes the leaching agent to flow axially and radially as it follows the lifting and rotating movement of the rotating rod 152, forming a complex three-dimensional flow pattern. This flow allows the leaching agent to fully exchange up and down, inside and outside the kettle body 11, driving the materials in different layers and regions to be fully mixed, effectively avoiding mixing dead corners. The grinding balls 153 move within the annular concave arc surface at the bottom of the kettle body 11. Through rotation, up and down movement, and self-rotation, they not only further squeeze and grind the incompletely crushed products to improve their degree of crushing, but also use the up and down movement to flow the lithium battery crushed products squeezed to the outside of the grinding balls 153 and the bottom of the kettle body 11 into the annular concave arc surface at the bottom of the kettle body 11 for further hammering and squeezing.

[0045] Advantage 5: The scraper 154 can not only effectively scrape off the material adhering to the outer surface of the grinding ball 153, and mix it into the leaching agent under the action of water circulation during the rotation process, thereby maintaining the grinding efficiency of the grinding ball 153, but also stir the leaching agent during the rotation process, thereby enhancing the stirring effect and further promoting the mixing of the material and the leaching agent.

[0046] Advantage 6. Through the forward and reverse rotation of the rotating shaft 14, the processing of materials at different stages can be achieved: when rotating forward, the limiting groove 162 is always in contact with the outer surface of the rotating block 1641, and the L-shaped rod 163 and the rotating block 1641 cause the stirring structure 15 to perform reciprocating lifting and lowering motion. When returning from the highest point to the lowest point, the grinding ball 153 can squeeze and hammer the larger lithium battery fragments; when the rotating shaft 14 rotates reversely, the reversing member 164 no longer contacts the inside of the limiting groove 162. At this time, the stirring structure 15 only rotates in the horizontal direction, and the material that has become smaller particles is finely ground to make the powder more evenly distributed and no longer precipitate at the bottom of the kettle body 11. It is in full contact with the leaching agent, thereby improving the metal recovery rate and meeting the needs of different stages of the leaching reaction.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A waste lithium battery regeneration system based on an ultrasonic-assisted leaching structure, characterized in that: include: An extraction part (1), the extraction part (1) comprises a kettle body (11), the top end of the kettle body (11) is sealedly connected to an upper gland (12), the upper gland (12) is rotatably connected to a rotating shaft (14) via a hollow shaft (13) fixed therein, and the rotating shaft (14) is provided with a stirring structure (15) for mixing materials via a chute provided at its bottom end; An ultrasonic generator (2), the ultrasonic generator (2) being fixedly mounted on the bottom end of the kettle body (11); The stirring structure (15) comprises a connecting shaft (151), the connecting shaft (151) being slidably connected to the circumferential inner wall of the rotating shaft (14) via a flat key (1511) provided on the circumferential outer surface of the connecting shaft (151), a rotating rod (152) being fixedly connected to the circumferential outer surface of the connecting shaft (151), and a grinding ball (153) being rotatably connected to the circumferential outer surface of the rotating rod (152); The bottom end of the hollow shaft (13) is provided with a lifting member (16) that can be used to move the grinding balls (153) up and down.

2. The waste lithium battery regeneration system based on the ultrasound-assisted leaching structure according to claim 1 is characterized in that: The lifting member (16) includes a spring (161) arranged on the upper surface of the connecting shaft (151), and one end of the spring (161) away from the connecting shaft (151) is connected to the top of the inner wall of the slide groove. The circumferential outer surface of the connecting shaft (151) is provided with a limiting groove (162). The hollow shaft (13) is provided with a reversing member (164) that fits with the inner wall of the limiting groove (162) through an L-shaped rod (163) fixedly connected to the bottom end thereof. Two L-shaped rods (163) are provided and are symmetrically distributed with the connecting shaft (151) as the center.

3. The waste lithium battery regeneration system based on ultrasound-assisted leaching structure according to claim 1 is characterized in that: The bottom end of the inner wall of the kettle body (11) is designed with an annular concave arc surface that fits the outer circumferential surface of the grinding ball (153).

4. The waste lithium battery regeneration system based on the ultrasound-assisted leaching structure according to claim 3 is characterized in that: A scraper (154) is fixedly connected to a side of the outer circumferential surface of the rotating rod (152) close to the hollow shaft (13), and is in contact with the outer circumferential surface of the grinding ball (153).

5. The waste lithium battery regeneration system based on the ultrasound-assisted leaching structure according to claim 4 is characterized in that: Three grinding balls (153) are provided and distributed in a circular array with the connecting shaft (151) as the central axis. The scraper (154) adopts an inclined design, and the outer end of the scraper (154) away from the grinding balls (153) is thinner.

6. The waste lithium battery regeneration system based on ultrasound-assisted leaching structure according to claim 5, characterized in that: The outer circumferential surface of the rotating rod (152) is sleeved with a gear (155) fixed to the end of the grinding ball (153) away from the connecting shaft (151), and the inner circumferential wall of the kettle body (11) is fixedly connected to a gear ring (156) meshing with the outer surface of the gear (155).

7. The waste lithium battery regeneration system based on ultrasound-assisted leaching structure according to claim 2, characterized in that: The reversing member (164) includes a rotating block (1641) rotatably connected to the bottom end of the L-shaped rod (163). The rotating block (1641) is rotatably connected to the inside of the L-shaped rod (163) via a shaft arranged inside the rotating block (1641). One end of the rotating block (1641) close to the connecting shaft (151) adopts an arc surface design that fits the inner wall of the limiting groove (162). A limiting plate (1642) fixedly connected to the inside of the L-shaped rod (163) is provided on one side of the rotating block (1641).

8. The waste lithium battery regeneration system based on ultrasound-assisted leaching structure according to claim 7 is characterized in that: The outer circumferential surface of the shaft is sleeved with a torsion spring (1643) connected to the interior of the L-shaped rod (163).

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