A roasting furnace for lithium battery black powder recovery

Abstract

This invention relates to the technical field of lithium battery black powder recycling equipment, specifically a roasting furnace for lithium battery black powder recycling, comprising: a heating cylinder with a feeding cylinder connected to one end, and a spiral feeding rod disposed inside the feeding cylinder; a second filter screen disposed inside the heating cylinder, and a crushing component disposed inside the second filter screen; an air blowing component for blowing air through the filter holes of the second filter screen to blow off the raw material adhering to the surface of the second filter screen; and a stirring component for stirring and mixing the filtered raw material. The beneficial effect is that, through the rotating second filter screen in conjunction with the internal crushing component, large particles of lithium battery crushed raw material and solid reducing agent raw material entering the second filter screen can be further crushed. Raw material meeting the particle size requirements falls into the heating cylinder through the filter holes of the second filter screen, ensuring that the raw material particles are uniform and fine, allowing the reducing agent and lithium battery crushed raw material to fully mix and contact, thereby improving the reduction reaction rate.

Description

Technical Field

[0001] This invention relates to the technical field of lithium battery black powder recycling equipment, specifically a roasting furnace for lithium battery black powder recycling. Background Technology

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. Lithium battery black powder refers to a black or grayish-black powdery intermediate material rich in one or more valuable metals such as Li, Ni, Co, and Mn, obtained by processing waste lithium-ion batteries or battery material processing waste as raw materials through processes such as discharge, dismantling, pyrolysis, crushing, and sorting. In the prior art, Chinese utility model patent CN217737752U discloses a lithium battery electrolyte drying and black powder separation device, including a control cabinet housing and a fixed roller. A drying and separation mechanism is arranged in the middle left side of the control cabinet housing and the fixed roller. The front and rear walls of the control cabinet housing are... Several disassembly mechanisms are equidistantly arranged. The drying and separation mechanism includes a motor, an electric heating element, and a control switch. The main shaft of the motor is fixedly connected to one end of the first rod. The other end of the first rod passes through the control cabinet housing and the middle left side of the fixed roller and is rotatably connected to the middle left side of the stainless steel screen. The threaded grooves are all threadedly connected to the fixed threaded pins. In the above scheme, the stainless steel screen is dried by the electric heating element and the black powder is screened and separated. The drying and separation are both set inside the control cabinet housing, so that the equipment is integrated and does not occupy space. The fixed threaded pins are separated from the threaded grooves by rotating the fixed threaded pins. In the aforementioned technology, drying is performed using electric heating elements, and black powder is separated by screening using a stainless steel screen. However, the recovery of black powder requires the use of a reducing agent, which is mixed with the lithium battery pulverized raw materials for reduction. The reduction rate depends on the thoroughness of the mixing between the reducing agent and the lithium battery pulverized raw materials. Therefore, the smaller the particle size of the reducing agent and the lithium battery pulverized raw materials, the better. The lithium battery electrolyte drying and black powder separation equipment in the above scheme is not equipped with a filtration device. Some large particles of reducing agent and large particles of lithium battery pulverized raw materials cannot be fully mixed, resulting in a slow reduction reaction rate, which in turn affects the black powder recovery efficiency. At the same time, when large particles of raw materials cannot pass through the screen holes smoothly, they are prone to adhering and clogging the screen holes, further affecting the subsequent raw material filtration and screening operations. This leads to frequent equipment shutdowns for cleaning, reducing production efficiency and increasing labor maintenance costs. Summary of the Invention

[0003] The purpose of this invention is to provide a roasting furnace for the recovery of lithium battery black powder, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A roasting furnace for recovering lithium battery black powder includes: A heating cylinder, one end of which is connected to a feeding cylinder, and a spiral feeding rod is rotatably arranged inside the feeding cylinder; The second filter screen is rotatably disposed inside the heating cylinder at a position corresponding to the outside of the feeding cylinder, and the second filter screen is provided with a crushing component for crushing the lithium battery crushing raw materials and solid reducing agent raw materials conveyed to the second filter screen by the feeding cylinder. An air blowing assembly is used to blow air into the filter holes of the second filter screen to blow off the raw materials adhering to the surface of the second filter screen. The stirring assembly is installed outside the second filter screen and rotates inside the heating cylinder to stir and mix the filtered raw materials.

[0005] Furthermore, the end of the feed cylinder furthest from the heating cylinder is connected to the outlet of the lithium battery crushing device; The end of the spiral feed rod away from the heating cylinder is connected to the drive device. The drive device drives the spiral feed rod to rotate, conveying the lithium battery raw materials crushed by the lithium battery crushing device into the interior of the heating cylinder.

[0006] Furthermore, a discharge port is provided on the lower surface of the feed cylinder at a position corresponding to the interior of the second filter screen, and the raw material conveyed by the screw feeder is conveyed to the interior of the second filter screen through the discharge port; A drive motor is installed on the outside of the heating cylinder at the end position corresponding to the second filter screen. The output end of the drive motor passes through the side wall of the heating cylinder and is connected to the end of the second filter screen.

[0007] Furthermore, the second filter screen rotates inside the heating cylinder in cooperation with the drive motor; A motor base is provided below the drive motor, and multiple sets of spaced support frames are provided on the lower surface of the heating cylinder.

[0008] Furthermore, the pulverizing component includes a spiral extrusion plate disposed on the inner wall of the second filter screen, the spiral extrusion plate having a semi-annular structure; A second fixing rod is provided on the outer wall of the feed cylinder at the position corresponding to each of the spiral extrusion plates. A first receiving groove is opened at the end of the second fixing rod away from the feed cylinder. A crushing rod is inserted into the first receiving groove, and a first return spring is provided between the end of the crushing rod and the top of the inside of the first receiving groove.

[0009] Further, when the second filter screen rotates relative to the feed cylinder through the driving motor, the spiral extrusion plate arranged on the inner wall of the second filter screen rotates relative to the crushing rod. Since the spiral extrusion plate is arranged in a spiral shape, the side wall of the spiral extrusion plate will gradually approach the side wall of the crushing rod, and then gradually crush the unfiltered raw materials on one side of the spiral extrusion plate; At the positions corresponding to the spiral extrusion plates inside the second filter screen, inclined diversion plates are arranged. The cross section of the inclined diversion plates is inclined, and the lower ends of the inclined diversion plates are close to the side walls corresponding to the spiral extrusion plates.

[0010] Further, the air blowing component includes air blowing nozzles arranged on the upper surface of the feed cylinder, and the air blowing nozzles are arranged at the positions corresponding to the filter holes of the second filter screen; A gas storage airbag is arranged between the end face of each crushing rod and the inner wall of the corresponding first storage groove. An exhaust pipeline is arranged between each gas storage airbag and each air blowing nozzle, and the gas storage airbag is communicated with the air blowing nozzle through the exhaust pipeline; Protrusions are arranged on the inner wall of the second filter screen at the positions corresponding to the crushing rods; A filter screen is arranged inside the air blowing nozzle to prevent the raw materials from being sucked back into the gas storage airbag.

[0011] Further, a first filter screen is sleeved outside the second filter screen, and the filter holes on the first filter screen are adapted to the filter holes on the second filter screen; A groove is arranged on the side wall of the second filter screen. At the position corresponding to the groove on the side wall of the first filter screen, a driving rod with a "C" - shaped structure is installed. The other end of the driving rod is slidably inserted into the inside of the groove, and a third return spring is arranged between the side wall of the groove and the inner wall of the driving rod.

[0012] Further, a plurality of groups of slots distributed in a circular pattern are arranged on the outer surface of the first filter screen; At the positions corresponding to the slots inside the heating cylinder, third fixing rods are installed. A second storage groove is arranged at the lower end of the third fixing rod. A limiting rod is inserted into the inside of the second storage groove, and a second return spring is arranged between the end of the limiting rod and the inner top of the corresponding second storage groove; The lower end of the limiting rod is elastically inserted into the corresponding slot through the second return spring, and a first inclined surface is arranged on the side wall of the lower end of the limiting rod facing the side where the first filter screen rotates.

[0013] Furthermore, the stirring assembly includes a first fixing rod disposed on the outer surface of the first filter screen, and an arc-shaped stirring plate is connected to the end of the first fixing rod away from the first filter screen. The arc-shaped stirring plate rotates and stirs inside the heating cylinder in cooperation with the first fixing rod. Both ends of the arc-shaped stirring plate are provided with beveled surfaces, and the center end of the arc-shaped stirring plate is provided with a mounting plate. The mounting plate has multiple sets of spaced second beveled surfaces arranged inside.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the rotation of the second filter screen in conjunction with the internal crushing component, can further crush large-particle lithium battery crushing raw materials and solid reducing agent raw materials entering the second filter screen. Raw materials that meet the particle size requirements fall into the heating cylinder through the filter holes on the second filter screen, which can ensure that the raw material particles are uniform and fine, allowing the reducing agent and lithium battery crushing raw materials to be fully mixed and contacted, improving the reduction reaction rate and ensuring the efficiency of black powder recovery.

[0015] 2. The present invention, through the air blowing component, can continuously blow air into the filter holes of the second filter screen, blowing off the raw materials adhering to and clogging the filter holes, avoiding clogging of the filter holes, eliminating the need for frequent equipment shutdowns for cleaning, reducing manual maintenance costs, and improving production efficiency.

[0016] 3. The present invention uses a second filter screen to drive the stirring assembly to rotate inside the heating cylinder, which can stir and mix the qualified raw materials falling into the heating cylinder, so that the reducing agent and the lithium battery crushed raw materials are further mixed evenly, further improving the rate of reduction reaction and ensuring the effect of roasting and recovery. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention. Figure 3 This is a schematic cross-sectional view of the three-dimensional structure of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the feeding cylinder and spiral extrusion plate structure of the present invention; Figure 6 for Figure 3 Enlarged schematic diagram of the structure at point B; Figure 7 This is a schematic diagram showing the structural connection between the first filter screen, the second filter screen, and the stirring assembly of the present invention; Figure 8 for Figure 7Enlarged schematic diagram of the structure at point C; Figure 9 This is a cross-sectional schematic diagram of the arc-shaped stirring plate structure of the present invention.

[0018] In the diagram: 1. Heating cylinder; 2. Drive motor; 3. Motor base; 4. Support frame; 5. Feed cylinder; 6. First filter screen; 7. First fixing rod; 8. Spiral feeding rod; 9. Second filter screen; 10. Spiral extrusion plate; 11. Air nozzle; 12. Discharge port; 13. Inclined guide plate; 14. Second fixing rod; 15. First receiving groove; 16. Air storage bag; 17. First return spring; 18. Crushing rod; 19. Exhaust pipe; 20. Third fixing rod; 21. Second receiving groove; 22. Second return spring; 23. Limiting rod; 24. Slot; 25. Drive rod; 26. Groove; 27. First oblique surface; 28. Third return spring; 29. ​​Arc-shaped stirring plate; 30. Mounting plate; 31. Second oblique surface; 32. Oblique surface; 33. Protrusion. Detailed Implementation

[0019] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0020] Example 1: Please see Figures 1 to 9 This invention provides a technical solution: a roasting furnace for the recycling of lithium battery black powder, comprising: Heating cylinder 1, one end of which is connected to a feeding cylinder 5, and a spiral feeding rod 8 is rotatably arranged inside the feeding cylinder 5; The second filter screen 9 is rotatably disposed inside the heating cylinder 1 at a position corresponding to the outside of the feeding cylinder 5, and the second filter screen 9 is provided with a crushing component for crushing the lithium battery crushing raw materials and solid reducing agent raw materials that are fed into the second filter screen 9 by the feeding cylinder 5. The air blowing assembly is used to blow air into the filter holes on the second filter screen 9 to blow off the raw materials adhering to the surface of the second filter screen 9. The stirring assembly is installed outside the second filter screen 9 and is rotated inside the heating cylinder 1 to stir and mix the filtered raw materials.

[0021] In the above technical solution: the heating cylinder 1 is specifically a heating cylinder, which can heat and roast the uniformly mixed raw materials inside to realize the reduction and recovery of lithium battery black powder. The end of the feeding cylinder 5 away from the heating cylinder 1 is connected to the outlet of the lithium battery crushing device. The spiral feeding rod 8 is specifically a spiral feeding rod. The end of the spiral feeding rod 8 away from the heating cylinder 1 is connected to the driving device. The driving device drives the spiral feeding rod 8 to rotate, and the lithium battery raw materials crushed by the lithium battery crushing device and the solid reducing agent are transported together to the interior of the heating cylinder 1. The feed cylinder 5 has an outlet 12 that penetrates the lower surface of the feed cylinder 5 at a position corresponding to the interior of the second filter screen 9. The raw material conveyed by the spiral feed rod 8 is conveyed to the interior of the second filter screen 9 through the outlet 12. A drive motor 2 is installed on the exterior of the heating cylinder 1 at a position corresponding to the end of the second filter screen 9. The output end of the drive motor 2 passes through the side wall of the heating cylinder 1 and is connected to the end of the second filter screen 9. The second filter screen 9 rotates inside the heating cylinder 1 with the cooperation of the drive motor 2 to filter and screen the raw material conveyed to the interior of the second filter screen 9. The air blowing assembly is used to blow air into the filter holes on the second filter screen 9 to blow off the raw materials adhering to the surface of the second filter screen 9. The stirring assembly is installed outside the second filter screen 9 and is rotated inside the heating cylinder 1 to stir and mix the filtered raw materials.

[0022] Example 2: like Figures 2-5 As shown, the roasting furnace for lithium battery black powder recycling disclosed in Embodiment 2 of the present invention has a structure that is basically the same as that in Embodiment 1, except that...

[0023] The pulverizing component includes a spiral extrusion plate 10 disposed on the inner wall of the second filter screen 9, and the spiral extrusion plate 10 has a semi-annular structure; The outer wall of the feed cylinder 5 is provided with a second fixing rod 14 at the position corresponding to each of the spiral extrusion plates 10. The second fixing rod 14 is provided with a first receiving groove 15 at the end away from the feed cylinder 5. A crushing rod 18 is inserted into the inside of the first receiving groove 15, and a first return spring 17 is provided between the end of the crushing rod 18 and the top of the inside of the first receiving groove 15. When the second filter screen 9 rotates relative to the feed cylinder 5 via the drive motor 2, the spiral extrusion plate 10 disposed on the inner wall of the second filter screen 9 rotates relative to the crushing rod 18. Since the spiral extrusion plate 10 is spiral in shape, the side wall of the spiral extrusion plate 10 will gradually approach the side wall of the crushing rod 18, thereby gradually crushing the unfiltered raw material on one side of the spiral extrusion plate 10. An inclined guide plate 13 is provided inside the second filter screen 9 at a position corresponding to each of the spiral extrusion plates 10. The cross-section of the inclined guide plate 13 is inclined, and the lower end of the inclined guide plate 13 is close to the side wall of the corresponding spiral extrusion plate 10.

[0024] In the above technical solutions: When the second filter screen 9 rotates relative to the feed cylinder 5 via the drive motor 2, the spiral extrusion plate 10 disposed on the inner wall of the second filter screen 9 rotates relative to the crushing rod 18. Since the spiral extrusion plate 10 is spiral in shape, the side wall of the spiral extrusion plate 10 will gradually approach the side wall of the crushing rod 18, thereby gradually crushing the unfiltered large particles of raw material between the spiral extrusion plate 10 and the crushing rod 18. An inclined guide plate 13 is provided inside the second filter screen 9 at a position corresponding to each of the spiral extrusion plates 10. The cross-section of the inclined guide plate 13 is inclined, and the lower end of the inclined guide plate 13 is close to the side wall of the corresponding spiral extrusion plate 10. This can guide the raw material to the area between the spiral extrusion plate 10 and the crushing rod 18, ensuring the stable operation of the crushing operation.

[0025] Example 3: like Figures 4-5 As shown, the roasting furnace for lithium battery black powder recycling disclosed in Embodiment 3 of the present invention has a structure that is basically the same as that in Embodiment 2, except that...

[0026] The air blowing assembly includes an air blowing nozzle 11 disposed on the upper surface of the feed cylinder 5, and the air blowing nozzle 11 is disposed at the position corresponding to the filter hole of the second filter screen 9. An air storage bladder 16 is provided between the end face of each of the crushing rods 18 and the inner wall of the corresponding first storage groove 15. An exhaust pipe 19 is provided between each of the air storage bladders 16 and each of the blowing nozzles 11. The air storage bladder 16 is connected to the blowing nozzle 11 through the exhaust pipe 19. The inner wall of the second filter screen 9 is provided with protrusions 33 at positions corresponding to the crushing rod 18; The air nozzle 11 is equipped with a filter screen to prevent raw materials from being sucked back into the air storage bag 16.

[0027] In the above technical solutions: When the second filter screen 9 rotates relative to the crushing rod 18, the crushing rod 18 regularly contacts the protrusion 33, causing the crushing rod 18 to be stored inside the first storage groove 15. During storage, the crushing rod 18 compresses the air storage bag 16, and the gas inside the air storage bag 16 is discharged into the air blowing nozzle 11 through the exhaust pipe 19, and finally sprayed out from the air blowing nozzle 11 to blow air onto the filter holes on the second filter screen 9, blowing off the raw materials that are adhering and blocking the filter holes, thus preventing the filter holes from becoming clogged. Furthermore, when the crushing rod 18 is misaligned with the protrusion 33, the crushing rod 18 impacts the inner wall of the second filter screen 9, thereby accelerating the filtration efficiency of the second filter screen 9.

[0028] Example 4: like Figure 3 and Figures 6-8 As shown in the figure, the roasting furnace for lithium battery black powder recovery disclosed in the fourth embodiment of the present invention has basically the same structure as that in the third embodiment, and the difference is as follows: A first filter screen 6 is sleeved outside the second filter screen 9, and the filter holes on the first filter screen 6 are adapted to the filter holes on the second filter screen 9; A groove 26 is formed on the side wall of the second filter screen 9, and a driving rod 25 with a "C" - shaped structure is installed at a position corresponding to the groove 26 on the side wall of the first filter screen 6. The other end of the driving rod 25 is slidably inserted into the inside of the groove 26, and a third return spring 28 is arranged between the side wall of the groove 26 and the inner wall of the driving rod 25; Multiple groups of slots 24 distributed in a circular pattern are formed on the outer surface of the first filter screen 6; At a position corresponding to the slots 24 at the inner top of the heating cylinder 1, a third fixing rod 20 is installed. A second receiving groove 21 is formed at the lower end of the third fixing rod 20, and a limiting rod 23 is inserted into the inside of the second receiving groove 21. A second return spring 22 is arranged between the end of the limiting rod 23 and the inner top of the corresponding second receiving groove 21; The lower end of the limiting rod 23 is elastically inserted into the corresponding slot 24 through the second return spring 22, and a first inclined surface 27 is formed on the side wall of the lower end of the limiting rod 23 facing the side of rotation of the first filter screen 6.

[0029] In the above technical solution: Through the cooperation of the driving rod 25 and the groove 26, the synchronous rotation of the first filter screen 6 and the second filter screen 9 is realized. During the rotation process, the elastically arranged limiting rod 23 is regularly inserted into the slot 24 to perform rotational limiting on the rotatable first filter screen 6. During the limiting process, the driving rod 25 rotates inside the groove 26 and compresses the third return spring 28; When the driving rod 25 rotates to the inner side wall of the groove 26, under the action of the first inclined surface 27, the elastically arranged limiting rod 23 moves out of the slot 24. At this time, the first filter screen 6 is no longer limited, and under the reset action of the third return spring 28 and the driving rod 25, it rotates relative to the second filter screen 9 to tear the raw material between the filter holes of the first filter screen 6 and the second filter screen 9.

[0030] Embodiment Five: As Figure 9 shown, the roasting furnace for lithium battery black powder recovery disclosed in the fifth embodiment of the present invention has basically the same structure as that in the fourth embodiment, and the difference is as follows: The stirring assembly includes a first fixing rod 7 disposed on the outer surface of the first filter screen 6. An arc-shaped stirring plate 29 is connected to one end of the first fixing rod 7 away from the first filter screen 6. The arc-shaped stirring plate 29 rotates and stirs inside the heating cylinder 1 in cooperation with the first fixing rod 7. Both ends of the arc-shaped stirring plate 29 are provided with oblique cut surfaces 32, and the center end of the arc-shaped stirring plate 29 is provided with a mounting plate 30. The mounting plate 30 has multiple sets of spaced second oblique cut surfaces 31 rotatably arranged inside.

[0031] In the above technical solutions: The arc-shaped stirring plate 29 rotates synchronously inside the heating cylinder 1 via the first fixed rod 7 and the first filter screen 6, stirring the qualified raw materials entering the heating cylinder 1, so that the reducing agent and lithium battery crushed raw materials are fully and evenly mixed. During mixing, the raw materials enter the second inclined surface 31 through the inclined surface 32, and are further crushed and pulverized by the rotation of the second inclined surface 31.

[0032] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A roasting furnace for recovering lithium battery black powder, characterized in that, Comprising: A heating cylinder (1), one end of the heating cylinder (1) is communicated with a feeding cylinder (5), and a spiral feeding rod (8) is rotatably arranged inside the feeding cylinder (5); A second filter screen (9), rotatably arranged inside the heating cylinder (1) at a position corresponding to the outside of the feeding cylinder (5), and a crushing component is arranged inside the second filter screen (9) for crushing the lithium battery crushing raw materials and solid reducing agent raw materials conveyed from the feeding cylinder (5) into the second filter screen (9); A blowing component for blowing air through the filter holes on the second filter screen (9) to blow off the raw materials adhered to the surface of the second filter screen (9); A stirring component, installed outside the second filter screen (9), and rotatably arranged inside the heating cylinder (1) through the second filter screen (9) for stirring and mixing the filtered raw materials; A first filter screen (ό) is sleeved outside the second filter screen (9), and the filter holes on the first filter screen (ό) are adapted to the filter holes on the second filter screen (9); A groove (26) is formed on the side wall of the second filter screen (9), and a driving rod (25) with a "C"-shaped structure is installed at a position corresponding to the groove (26) on the side wall of the first filter screen (6). The other end of the driving rod (25) is slidably inserted into the groove (26), and a third return spring (28) is arranged between the side wall of the groove (26) and the inner wall of the driving rod (25); A plurality of groups of slots (24) distributed in a circular pattern are formed on the outer surface of the first filter screen (6); A third fixing rod (20) is installed inside the heating cylinder (1) at a position corresponding to the slots (24) at the top end. A second receiving groove (21) is formed at the lower end of the third fixing rod (20), and a limiting rod (23) is inserted into the second receiving groove (21). A second return spring (22) is arranged between the end of the limiting rod (23) and the inner top end of the corresponding second receiving groove (21); The lower end of the limiting rod (23) is elastically inserted into the corresponding slot (24) through the second return spring (22), and a first inclined surface (27) is formed on the side wall of the lower end of the limiting rod (23) facing the rotating side of the first filter screen (6); The stirring component includes a first fixing rod (7) arranged on the outer surface of the first filter screen (6). One end of the first fixing rod (7) far from the first filter screen (6) is connected with an arc-shaped stirring plate (29). The arc-shaped stirring plate (29) rotates and stirs inside the heating cylinder (1) through the cooperation of the first fixing rod (7); Oblique surfaces (32) are formed at both ends of the arc-shaped stirring plate (29), and a mounting plate (30) is formed at the central end of the arc-shaped stirring plate (29). A plurality of groups of second inclined surfaces (31) distributed at intervals are rotatably arranged inside the mounting plate (30); 2. The roasting furnace for lithium battery black powder recovery according to claim 1, characterized in that, One end of the feeding cylinder (5) far from the heating cylinder (1) is communicated with the outlet of the lithium battery crushing device; The end of the spiral feed rod (8) away from the heating cylinder (1) is connected to the driving device. The driving device drives the spiral feed rod (8) to rotate, and transports the lithium battery raw materials crushed by the lithium battery crushing device to the inside of the heating cylinder (1).

3. The roasting furnace for lithium battery black powder recovery according to claim 2, characterized in that, The feed cylinder (5) has an outlet (12) that penetrates the lower surface of the feed cylinder (5) at a position corresponding to the interior of the second filter screen (9). The raw material conveyed by the spiral feed rod (8) is conveyed to the interior of the second filter screen (9) through the outlet (12). A drive motor (2) is installed on the outside of the heating cylinder (1) at the end position corresponding to the second filter screen (9). The output end of the drive motor (2) passes through the side wall of the heating cylinder (1) and is connected to the end of the second filter screen (9).

4. The roasting furnace for lithium battery black powder recovery according to claim 3, characterized in that, The second filter screen (9) rotates inside the heating cylinder (1) in cooperation with the drive motor (2); A motor base (3) is provided below the drive motor (2), and multiple sets of spaced support frames (4) are provided on the lower surface of the heating cylinder (1).

5. The roasting furnace for lithium battery black powder recovery according to claim 3, characterized in that, The crushing assembly includes a spiral extrusion plate (10) disposed on the inner wall of the second filter screen (9), and the spiral extrusion plate (10) has a semi-annular structure; The outer wall of the feed cylinder (5) is provided with a second fixing rod (14) at the position corresponding to each of the spiral extrusion plates (10). The second fixing rod (14) is provided with a first receiving groove (15) at the end away from the feed cylinder (5). A crushing rod (18) is inserted into the inside of the first receiving groove (15), and a first reset spring (17) is provided between the end of the crushing rod (18) and the top of the inside of the first receiving groove (15).

6. The roasting furnace for lithium battery black powder recovery according to claim 5, characterized in that, When the second filter screen (9) rotates relative to the feed cylinder (5) via the drive motor (2), the spiral extrusion plate (10) set on the inner wall of the second filter screen (9) rotates relative to the crushing rod (18). Since the spiral extrusion plate (10) is set in a spiral shape, the side wall of the spiral extrusion plate (10) will gradually approach the side wall of the crushing rod (18), thereby gradually crushing the unfiltered raw material on one side of the spiral extrusion plate (10). The second filter screen (9) has an inclined guide plate (13) at the position corresponding to each of the spiral extrusion plates (10). The cross section of the inclined guide plate (13) is inclined, and the lower end of the inclined guide plate (13) is close to the side wall of the corresponding spiral extrusion plate (10).

7. The roasting furnace for lithium battery black powder recovery according to claim 5, characterized in that, The air blowing assembly includes an air blowing nozzle (11) disposed on the upper surface of the feed cylinder (5), and the air blowing nozzle (11) is disposed at the position corresponding to the filter hole of the second filter screen (9). Each of the crushing rods (18) has an air storage bladder (16) between its end face and the inner wall of the corresponding first storage groove (15). Each of the air storage bladders (16) and each of the blowing nozzles (11) has an exhaust pipe (19) between them. The air storage bladders (16) are connected to the blowing nozzles (11) through the exhaust pipes (19). The inner wall of the second filter screen (9) is provided with protrusions (33) at the position corresponding to the crushing rod (18); The air nozzle (11) is equipped with a filter screen to prevent raw materials from being sucked back into the air storage bag (16).

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