A system for recycling waste lithium battery graphite negative electrode material

Abstract

The utility model discloses a kind of waste lithium battery graphite negative electrode material recovery systems, the utility model relates to waste lithium battery graphite negative electrode material recovery technical field, including vertical continuous graphitization electric furnace, speed reducer one and material blocking pipe, the vertical continuous graphitization electric furnace is provided with feed hopper, installation component for installing speed reducer one is provided on the feed hopper, the speed reducer one is connected with rotating shaft, the rotating shaft is provided with the auger in feed hopper, bearing one is connected between the rotating shaft and installation component, the rotating shaft is provided with fixed ring, the fixed ring is inserted in support ring, fixed ring is connected with support pipe, make ball pass through support cover support, rotating shaft and auger can be supported by ball and support cover when being stressed, and rotation feeding is not affected, to solve the problem that the connecting portion of rotating shaft is prone to looseness.

Description

Technical Field

[0001] This utility model relates to the technical field of graphite anode materials for waste lithium batteries, specifically a recycling system for graphite anode materials for waste lithium batteries. Background Technology

[0002] In the recycling of waste lithium-ion battery anode materials, the current practice generally relies on the extreme thermal environment created by a vertical continuous graphitization furnace (with the operating temperature precisely controlled at 2800°C to 3000°C or higher). By precisely coordinating and controlling three core parameters—temperature field, reaction atmosphere composition and flow field, and holding time—the dual goals of deep purification and structural repair are achieved. The vertical continuous furnace design, combined with precise process control (temperature uniformity, precise atmosphere distribution, flow field optimization, and matching holding time), ensures the high efficiency, stability, and scalability of the processing. Compared with batch furnaces, it has lower energy consumption and better product consistency.

[0003] Current vertical continuous graphitization electric furnaces have a feed inlet at the top. To prevent the escape of flue gas from the furnace, a feeder is installed at the feed inlet. The feeder feeds carbon raw materials into the containment space by rotating the feeder in a closed-loop manner. For example, a vertical graphitization furnace disclosed in publication number CN218478546U uses a rotary feeder for feeding. However, after a large amount of raw material is poured into the feed inlet, the feeder is subjected to excessive compression. This compression is mostly due to gravity. As a result, after being subjected to downward pressure for a long time, the feeder connection is prone to loosening and the feeder spiral blades are prone to deformation. Therefore, improvements are needed.

[0004] Furthermore, in current vertical continuous graphitization electric furnaces, the ash vapor evaporated in the high-temperature zone naturally rises and needs to penetrate the upper secondary high-temperature heating zone to be discharged. During this penetration process, the high-temperature ash vapor encounters the secondary high-temperature carbonaceous raw material, cools down, and condenses from a gaseous state into a solid state. It then clumps together with the fine powdery raw material, forming a hard shell layer that occupies the entire cross-section of the furnace in the secondary high-temperature zone. This hard shell layer is very harmful, as it prevents the smooth discharge of impurity vapors, causing the gas pressure inside the furnace to rise continuously and easily leading to excessively high operating pressure. A search revealed patent number CN202411289858.4, entitled "A Vertical Continuous Graphitization Furnace for Anti-Crusting and a Method for Anti-Crusting." The patent document describes a device that uses a mechanical disturbance mechanism to agitate materials in the preheating and sub-high-temperature heating zones. This prevents powdery materials and condensed ash from forming a hard shell, allowing impurities and evaporated gases to escape smoothly. The mechanical disturbance mechanism has two implementations: one where a motor is mounted on the outside of the graphitization furnace's side wall and connected to a stirring component penetrating the side wall, driving the stirring component to rotate vertically; and another where a motor is mounted on the outside of the graphitization furnace's top plate and connected to the stirring component via a drive shaft penetrating the top plate, driving the stirring component to rotate horizontally. Both implementations require a large number of motors and stirring components, resulting in high costs, and therefore require improvement. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a recycling system for graphite anode materials from waste lithium batteries, which solves the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste lithium battery graphite anode material recycling system, comprising a vertical continuous graphitization furnace, a geared motor, and a baffle pipe. The vertical continuous graphitization furnace is equipped with a feeding hopper, and the feeding hopper is equipped with an mounting assembly for mounting the geared motor. The geared motor is connected to a rotating shaft, and an auger located inside the feeding hopper is mounted on the rotating shaft. A bearing is connected between the rotating shaft and the mounting assembly. A fixing ring is mounted on the rotating shaft and inserted into a support ring. Bolt 1 is evenly arranged circumferentially between the support rings. Ball bearings are evenly arranged at the bottom of the support rings, and the bottom of the ball bearings contacts the support cover. Bolt 2 is evenly arranged on the support cover to connect with the mounting assembly. A lifting assembly is provided on the support cover. The baffle pipe is located inside the feed hopper, and the lifting assembly is used to drive the baffle pipe to rise and fall to separate the inner wall of the feed hopper. A bearing 2 is provided inside the vertical continuous graphitization electric furnace. A driven gear is connected to the bearing 2. Combing assemblies are provided on both sides of the bottom of the driven gear, and the driven gear is also connected to the drive assembly.

[0007] Preferably, the mounting assembly includes several connecting frames connected to the feed hopper, each connecting frame being connected to the mounting cover, the first geared motor being mounted on the mounting cover, and the first bearing and the second bolt being connected to the mounting cover.

[0008] Preferably, the lifting assembly includes an electric telescopic rod mounted on a support cover, and the output end of the electric telescopic rod is connected to a baffle tube.

[0009] Preferably, the lifting assembly further includes a guide rod that vertically penetrates the baffle tube and is connected to the support cover.

[0010] Preferably, the baffle tube has a structure that is smaller at the top and larger at the bottom.

[0011] Preferably, the bottom of the baffle tube is provided with a support protrusion.

[0012] Preferably, the drive assembly includes a second geared motor mounted on a vertical continuous graphitization furnace, the output shaft of the second geared motor being connected to a drive gear, and the drive gear meshing with a driven gear.

[0013] Preferably, the combing assembly includes a combing frame, on which a plurality of arc-shaped plates are provided. The top of the arc-shaped plates is provided with a conical part one, and the front and rear sides of the arc-shaped plates are provided with conical parts two.

[0014] Preferably, the combing frame includes a connecting rod disposed at the bottom of the driven gear, the bottom of the connecting rod is provided with a round rod, the bottom of the round rod is uniformly provided with vertical rods, and the bottom of the vertical rods are respectively connected to the conical parts on a plurality of arc plates.

[0015] Preferably, the vertical continuous graphitization furnace is provided with an installation rod, and an electrode is provided on the installation rod. The vertical continuous graphitization furnace is also connected to a nitrogen charging component and a dust suction pipe. The vertical continuous graphitization furnace is provided with a preheating zone, a secondary high-temperature heating zone, a high-temperature heating zone and a cooling zone from top to bottom, and the arc-shaped plate is located in the preheating zone and the secondary high-temperature heating zone.

[0016] This invention provides a recycling system for graphite anode materials from waste lithium batteries. Compared with existing technologies, it has the following advantages: 1. This waste lithium battery graphite anode material recycling system connects the fixing ring to the support tube, so that the ball bearings are supported by the support cover. In this way, the rotating shaft and auger can be supported by the ball bearings and the support cover when under force, without affecting the rotation and feeding, thus solving the problem of loosening at the connection of the rotating shaft.

[0017] 2. In this waste lithium battery graphite anode material recycling system, when the raw materials are poured into the feed hopper, a portion of the raw materials are poured in first. Then, the lifting component drives the support protrusion of the baffle tube to contact the feed hopper, and the remaining raw materials are poured in. At this time, the auger is only subjected to the pressure of the raw materials inside the baffle tube, so that the raw materials can be poured into the feed hopper in a very short time. It can also reduce the stress on the auger and prevent it from bending and deforming.

[0018] 3. This waste lithium battery graphite anode material recycling system drives the driven gear to rotate through the drive component, causing the combing frame to drive multiple arc-shaped plates to rotate back and forth in the preheating zone and the secondary high-temperature heating zone. This can comb the powder in the preheating zone and the secondary high-temperature heating zone back and forth, thereby preventing the powdery material in this area from forming a hard shell layer with the condensed ash. Compared with the existing technology, it can reduce the setting of motors and stirring components, saving costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 A cross-sectional schematic diagram; Figure 3 This is a schematic diagram of the combing frame of this utility model; Figure 4 This is a schematic diagram of the mounting components, lifting components, and baffle tube of this utility model; Figure 5 This utility model Figure 4 A cross-sectional schematic diagram; Figure 6 This is a schematic diagram of the lifting assembly and the baffle tube of this utility model.

[0020] In the diagram: 1. Vertical continuous graphitization electric furnace; 2. Feed hopper; 3. Gear motor one; 4. Rotating shaft; 5. Screwdriver; 6. Bearing one; 7. Fixing ring; 8. Support ring; 9. Ball bearing; 10. Bolt one; 11. Support cover; 12. Bolt two; 13. Material stop pipe; 14. Connecting frame; 15. Mounting cover; 16. Electric telescopic rod; 17. Guide rod; 18. Support protrusion; 19. Electrode; 20. Nitrogen charging assembly; 21. Dust suction pipe; 22. Gear motor two; 23. Drive gear; 24. Driven gear; 25. Bearing two; 26. Arc plate; 27. Connecting rod; 28. Round rod; 29. ​​Vertical rod; 30. Conical part one; 31. Conical part two; 32. Mounting rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] See Figures 1-6 This utility model provides the following two technical solutions: First implementation: A waste lithium battery graphite anode material recycling system includes a vertical continuous graphitization furnace 1, a geared motor 3, and a baffle pipe 13. The vertical continuous graphitization furnace 1 is equipped with a feeding hopper 2, and the feeding hopper 2 is equipped with an installation assembly for mounting the geared motor 3. The geared motor 3 is connected to a rotating shaft 4, and the rotating shaft 4 is equipped with an auger 5 located inside the feeding hopper 2. The auger 5 rotates to feed the material. A bearing 6 is connected between the rotating shaft 4 and the installation assembly. A fixing ring 7 is provided on the rotating shaft 4 and is inserted into a support ring 8. Bolts 10 are evenly arranged circumferentially between the fixing ring 7 and the support ring 8 so that the fixing ring 7 and the support ring 8 can be fixedly connected. Ball bearings 9 are evenly arranged at the bottom of the support ring 8, and the bottom of the ball bearings 9 contacts the support cover 11 to support the ball bearings 9, thereby supporting the rotating shaft 4 without affecting the rotation of the rotating shaft 4. Bolts 2 12 connected to the installation assembly are evenly arranged on the support cover 11. A lifting assembly is provided on the support cover 11. The baffle pipe 13 is located inside the feed hopper 2. The lifting assembly is used to drive the baffle pipe 13 to rise and fall to separate the inner wall of the feed hopper 2. When pouring raw materials into the feed hopper 2, a portion of the raw materials are poured in first. Then, the baffle pipe 13 is moved down to contact the inner wall of the feed hopper 2 by the lifting assembly, and the remaining raw materials are poured in. At this time, the auger 5 is only subjected to the pressure of the raw materials inside the baffle pipe 13. Thus, the raw materials can be poured into the feed hopper 2 in a very short time, and the stress on the auger 5 can be reduced to prevent it from bending and deforming. The vertical continuous graphitization electric furnace 1 is equipped with a bearing 25, and a driven gear 24 is connected to the bearing 25. Both sides of the bottom of the driven gear 24 are provided with combing components, and the driven gear 24 is also connected to the drive component. The drive component is used to drive the driven gear 24 to rotate, so that the combing components can rotate along the arc direction to comb the powder.

[0023] The mounting assembly includes several connecting frames 14 connected to the feed hopper 2. Each connecting frame 14 is connected to the mounting cover 15. The geared motor 3 is mounted on the mounting cover 15 and can be fixed in place. The bearing 6 and bolt 12 are both connected to the mounting cover 15.

[0024] The lifting assembly includes an electric telescopic rod 16 mounted on the support cover 11. The output end of the electric telescopic rod 16 is connected to the baffle tube 13. Powered and controlled by existing technology, the baffle tube 13 can be raised and lowered. The baffle tube 13 has a structure that is smaller at the top and larger at the bottom, so that after the material is blocked, the inner wall of the feed hopper 2 can store more raw materials on the outside of the baffle tube 13. It also includes a guide rod 17 that runs vertically through the baffle tube 13 and is connected to the support cover 11, which can guide the baffle tube 13. The bottom of the baffle tube 13 is provided with a support protrusion 18, which can have a larger contact area with the inner wall of the feed hopper 2. In this way, the baffle tube 13 can be supported by the inner wall of the feed hopper 2 when blocking material.

[0025] The second embodiment differs from the first embodiment mainly in that: the driving assembly includes a second geared motor 22 mounted on the vertical continuous graphitization furnace 1, the output shaft of the second geared motor 22 is connected to a driving gear 23, the driving gear 23 meshes with a driven gear 24, and the second geared motor 22 drives the driving gear 23 to rotate, causing the driven gear 24 to rotate; the combing assembly includes a combing frame, on which several arc-shaped plates 26 are mounted, the top of the arc-shaped plates 26 is provided with a conical portion 30, and both the front and rear sides of the arc-shaped plates 26 are provided with conical portions 31. The conical design firstly makes it less likely for powder to remain at the top, and secondly, it reduces the resistance encountered by the arc-shaped plates 26 during rotation, thus better breaking down the powder; the combing frame includes a connecting rod 27 located at the bottom of the driven gear 24, the bottom of the connecting rod 27 is provided with a circular... The rod 28 has vertical rods 29 evenly arranged at its bottom, and the bottom of each vertical rod 29 is connected to a conical part 30 on several arc plates 26. The use of the round rod 28 can reduce powder residue. The vertical continuous graphitization electric furnace 1 is equipped with an installation rod 32, on which an electrode 19 is provided for heating the powder. The vertical continuous graphitization electric furnace 1 is also connected to a nitrogen charging component 20 and a dust suction pipe 21 for introducing nitrogen to prevent oxidation. The dust suction pipe 21 is connected to a dust collector for treating smoke and dust. The vertical continuous graphitization electric furnace 1 is arranged from top to bottom as a preheating zone, a secondary high-temperature heating zone, a high-temperature heating zone, and a cooling zone. The arc plates 26 are located in the preheating zone and the secondary high-temperature heating zone. The arc plates 26, which rotate back and forth along the arc direction, can comb the powder in the area back and forth to prevent it from forming a hard shell.

[0026] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0027] In use, a portion of the raw material is first poured into the feed hopper 2, then the baffle pipe 13 moves down to contact the feed hopper 2, and the remaining raw material is poured in. At this time, the auger 5 is only subjected to the pressure of the partially loaded material, thereby reducing the stress on the auger 5, preventing it from bending and deforming, and allowing more raw material to be poured into the feed hopper 2 in a shorter time, saving the time of emptying the material. When the auger 5 rotates, the rotating shaft 4 drives the fixed ring 7 and the support ring 8 to rotate, causing the balls 9 to rotate on the support cover 11, which can control the rotation of the auger 5 and the rotating shaft 4. The support prevents loosening at the connection between the rotating shaft 4 and the bearing 6. The powder passes through the preheating zone, the secondary high-temperature heating zone, the high-temperature heating zone, and the cooling zone for heating and cooling, achieving the removal and recovery of impurities from the negative electrode material. At the same time, the drive component drives the driven gear 24 to rotate back and forth, causing the combing frame to drive the arc plate 26 to rotate back and forth. This prevents the powdery material in this area from forming a hard shell layer with the condensed ash. Compared with the existing technology, it can reduce the number of motors and stirring components, saving costs.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the material and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A recycling system for graphite anode materials from waste lithium batteries, characterized in that: The system includes a vertical continuous graphitization electric furnace (1), a geared motor (3), and a baffle pipe (13). The vertical continuous graphitization electric furnace (1) is equipped with a feed hopper (2). The feed hopper (2) is equipped with a mounting assembly for installing the geared motor (3). The geared motor (3) is connected to a rotating shaft (4). An auger (5) located inside the feed hopper (2) is mounted on the rotating shaft (4). A bearing (6) connects the rotating shaft (4) to the mounting assembly. A retaining ring (7) is mounted on the rotating shaft (4). The retaining ring (7) is inserted into… Bolt 1 (10) is evenly arranged in the circumferential direction between the fixed ring (7) and the support ring (8), and ball bearings (9) are evenly arranged at the bottom of the support ring (8), and the bottom of the ball bearings (9) is in contact with the support cover (11). Bolt 2 (12) connected to the mounting assembly is evenly arranged on the support cover (11). A lifting assembly is provided on the support cover (11). The baffle tube (13) is located inside the feed hopper (2), and the lifting assembly is used to drive the baffle tube (13) to rise and fall to separate the inner wall of the feed hopper (2). The vertical continuous graphitization electric furnace (1) is equipped with a bearing two (25), and a driven gear (24) is connected to the bearing two (25). Both sides of the bottom of the driven gear (24) are provided with combing components, and the driven gear (24) is also connected to the drive component.

2. The waste lithium battery graphite anode material recycling system according to claim 1, characterized in that: The mounting assembly includes several connecting frames (14) connected to the feed hopper (2), each of which is connected to the mounting cover (15). The first geared motor (3) is mounted on the mounting cover (15), and the first bearing (6) and the second bolt (12) are both connected to the mounting cover (15).

3. The waste lithium battery graphite anode material recycling system according to claim 1, characterized in that: The lifting assembly includes an electric telescopic rod (16) mounted on a support cover (11), and the output end of the electric telescopic rod (16) is connected to a baffle tube (13).

4. The waste lithium battery graphite anode material recycling system according to claim 3, characterized in that: The lifting assembly also includes a guide rod (17) that runs vertically through the baffle tube (13) and is connected to the support cover (11).

5. The waste lithium battery graphite anode material recycling system according to claim 1, characterized in that: The baffle tube (13) has a structure that is smaller at the top and larger at the bottom.

6. The waste lithium battery graphite anode material recycling system according to claim 1, characterized in that: The bottom of the baffle tube (13) is provided with a support protrusion (18).

7. A waste lithium battery graphite anode material recycling system according to claim 1, characterized in that: The drive assembly includes a second geared motor (22) mounted on a vertical continuous graphitization furnace (1). The output shaft of the second geared motor (22) is connected to a drive gear (23), which meshes with a driven gear (24).

8. A waste lithium battery graphite anode material recycling system according to claim 1, characterized in that: The combing assembly includes a combing frame, on which a plurality of arc-shaped plates (26) are provided. A cone-shaped part (30) is provided on the top of the arc-shaped plate (26), and a cone-shaped part (31) is provided on both the front and rear sides of the arc-shaped plate (26).

9. A waste lithium battery graphite anode material recycling system according to claim 8, characterized in that: The combing frame includes a connecting rod (27) located at the bottom of the driven gear (24). A round rod (28) is provided at the bottom of the connecting rod (27). Vertical rods (29) are evenly provided at the bottom of the round rod (28), and the bottom of the vertical rods (29) are respectively connected to the conical part (30) on several arc plates (26).

10. A waste lithium battery graphite anode material recycling system according to claim 8, characterized in that: The vertical continuous graphitization furnace (1) is equipped with an installation rod (32), and an electrode (19) is provided on the installation rod (32). The vertical continuous graphitization furnace (1) is also connected to a nitrogen charging component (20) and a dust suction pipe (21). The vertical continuous graphitization furnace (1) is provided with a preheating zone, a secondary high temperature heating zone, a high temperature heating zone and a cooling zone from top to bottom. The arc plate (26) is located in the preheating zone and the secondary high temperature heating zone.

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