Copper-aluminum powder sorting equipment for lithium battery recycling

Abstract

The application discloses a copper-aluminum powder sorting device for lithium battery recycling, which further comprises an air inlet pipeline, an air outlet pipeline, a first mounting frame, a second mounting frame, an elastic member, a vibration motor, a first screen, a cloth pipe, a spiral rotating shaft rotatably arranged in the cloth pipe, a spiral wing arranged on the outer circumferential surface of the spiral rotating shaft, the cloth pipe and the spiral wing being made of polytetrafluoroethylene material, a first discharge port, a second discharge port, a first electrode arranged in the middle bin body and located above the first discharge port, and a second electrode arranged in the middle bin body and located above the second discharge port. The copper-aluminum powder is sorted under the action of high-frequency vibration of the first screen. Under the action of the electric field formed by the first electrode and the second electrode, the electric field force on the copper particles is inclined upward, and the electric field force on the aluminum particles is inclined downward. The screening dimension is increased through the electric field force, multi-dimensional screening is formed, and higher-precision separation is realized.

Description

Technical Field

[0001] This application relates to the field of copper and aluminum powder sorting technology, and in particular to a copper and aluminum powder sorting device for lithium battery recycling. Background Technology

[0002] Lithium-ion battery copper-aluminum powder sorting equipment is a crucial link in achieving refined separation in waste lithium-ion battery recycling and processing lines. Currently, the mainstream technical approach generally adopts a combination of physical crushing and gravity separation processes to efficiently separate and recover valuable metals such as copper and aluminum.

[0003] Gravity separation is based on density differences and utilizes vibration and airflow for separation. The actual density of copper is approximately 8.96 g / cm³, while that of aluminum is approximately 2.70 g / cm³. Gravity separation can effectively separate copper and aluminum powders, but its separation efficiency has an upper limit. The highest separation rate of gravity separation is only about 87%, which is not conducive to the high-precision separation of copper and aluminum powders.

[0004] Therefore, it is necessary to propose a copper-aluminum powder sorting device for lithium battery recycling to improve the separation accuracy of copper-aluminum powder, which has become an important technical problem that needs to be solved urgently. Summary of the Invention

[0005] This application provides a copper-aluminum powder sorting device for lithium battery recycling, which aims to solve the problem that the separation rate of the existing air classification method is only about 87%, which is not conducive to the high-precision sorting of copper-aluminum powder.

[0006] To achieve the above objectives, this application proposes a copper-aluminum powder sorting device for lithium battery recycling, comprising a bottom chamber, a middle chamber connected to the bottom chamber, and a top chamber connected to the middle chamber. It further includes: an air inlet pipe disposed in the bottom chamber; an air outlet pipe disposed in the top chamber; a first mounting frame disposed inside the bottom chamber; a second mounting frame disposed on the first mounting frame; an elastic element disposed between the first and second mounting frames; a vibration motor disposed on the second mounting frame; and a first screen disposed on the second mounting frame. The structure includes: a feeding tube mounted on the top chamber; a rotatable spiral shaft located inside the feeding tube; a spiral blade located on the outer circumference of the spiral shaft; both the feeding tube and the spiral blade are made of polytetrafluoroethylene (PTFE); a first discharge port located in the middle chamber and at one end of the first screen; a second discharge port located in the middle chamber and at the other end of the first screen; a first electrode located in the middle chamber and above the first discharge port; and a second electrode located in the middle chamber and above the second discharge port.

[0007] In some embodiments, it further includes: a plurality of ribs spaced circumferentially on the inner wall surface of the fabric tube; and a first uniform material plate disposed inside the fabric tube.

[0008] In some embodiments, the device further includes: a second uniform plate disposed inside the fabric tube; and an ultrasonic head disposed inside the fabric tube.

[0009] In some embodiments, the device further includes: a third mounting bracket connected to the central housing via fastening screws; plastic bolts for mounting the first electrode and the second electrode to the third mounting bracket respectively; an insulating gasket disposed between the first electrode and the second electrode and the third mounting bracket; and nylon nuts screwed onto the plastic bolts and abutting against the first electrode and the second electrode respectively.

[0010] In some embodiments, the device further includes: a second screen disposed on a second mounting bracket, with the first screen disposed above the second screen; and a third discharge port disposed in the middle compartment and located at the bottom end of the second screen.

[0011] In some embodiments, the device further includes a plurality of connectors spaced apart on the second screen and connected to the first screen.

[0012] In some embodiments, it further includes a reduced diameter section disposed in the fabric tube.

[0013] In some embodiments, the device further includes: a frame disposed on one side of the bottom chamber; and a compressor fan disposed on the frame and connected to an air intake pipe.

[0014] In some embodiments, it further includes: a flow equalization cone sleeve disposed at the end of the intake duct.

[0015] In some embodiments, it further includes: a reinforcing rod, one end of which is connected to the bottom compartment and the other end of which is connected to the top compartment.

[0016] This application proposes a copper-aluminum powder sorting device for lithium battery recycling, comprising a bottom chamber, a middle chamber connected to the bottom chamber, and a top chamber connected to the middle chamber. It further includes: an air inlet pipe disposed in the bottom chamber; an air outlet pipe disposed in the top chamber; a first mounting frame disposed inside the bottom chamber; a second mounting frame disposed on the first mounting frame; an elastic element disposed between the first and second mounting frames; a vibration motor disposed on the second mounting frame; and a first screen disposed on the second mounting frame. The system comprises: a feeding tube located on the top chamber; a rotatable spiral shaft inside the feeding tube; and a spiral blade on the outer circumference of the spiral shaft. Both the feeding tube and the spiral blade are made of polytetrafluoroethylene (PTFE). A first discharge port is located in the middle chamber, at one end of the first screen; a second discharge port is located in the middle chamber, at the other end of the first screen; a first electrode is located in the middle chamber, above the first discharge port; and a second electrode is located in the middle chamber, above the second discharge port. Copper and aluminum powders flow into the friction section of the feeding tube under the influence of the feeding airflow. Copper particles generate a negative charge through friction with the PTFE feeding tube and spiral blade, while aluminum particles generate a positive charge. The copper and aluminum powders are fed onto the first screen through the feeding tube. Under the high-frequency vibration of the first screen, copper particles are discharged from the first discharge port, and aluminum particles are discharged from the second discharge port, completing the separation process. Furthermore, under the electric field formed by the first and second electrodes, the electric force on copper particles is inclined upwards, while the electric force on aluminum particles is inclined downwards. This electric force increases the sieving dimensions, forming multi-dimensional screening and achieving higher precision separation. Moreover, the copper-aluminum powder sorting equipment in this application integrates electrostatic separation and gravity separation into one device, significantly improving the processing capacity per unit time, while also having a small footprint and a short process flow. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a three-dimensional structural diagram of a copper-aluminum powder sorting device for lithium battery recycling according to one embodiment of this application; Figure 2 for Figure 1 Enlarged view of part A in the middle; Figure 3 This is a top view of a copper-aluminum powder sorting device for lithium battery recycling according to an embodiment of this application; Figure 4 for Figure 3Sectional view of the middle BB section; Figure 5 for Figure 4 Enlarged view of a section in the middle C; Figure 6 for Figure 4 Enlarged view of a section in part D; Figure 7 for Figure 4 A magnified view of part E in the middle.

[0018] In the diagram: Top chamber 1, Third mounting plate 2, Material distribution pipe 3, Reduction section 31, Flow equalization section 32, Rib 33, Annular limiting part 34, Friction section 35, Spiral shaft 36, Bearing 37, First mounting plate 38, Spiral blade 39, Second mounting plate 310, First material equalization plate 312, Second material equalization plate 313, Ultrasonic head 314, First discharge port 4, Bottom chamber 5, Frame 6, Compressor fan 7, Support leg 8, Middle chamber 9, Reinforcing rod 10, Clamp 11, Air outlet pipe 12, Connector 13, Second discharge port 14, Third discharge port 15, Elastic element 16, First mounting bracket 17, Vibration motor 18, Air inlet pipe 19, First screen 20, Second mounting bracket 21, Second screen 22, Fastening screw 23, Third mounting bracket 24, Insulating gasket 25, Plastic bolt 26, First electrode 27, Nylon nut 28. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] See Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, this application discloses a copper-aluminum powder sorting device for lithium battery recycling, comprising a bottom chamber 5, a middle chamber 9 connected to the bottom chamber 5, and a top chamber 1 connected to the middle chamber 9. It also includes: an air inlet pipe 19 disposed in the bottom chamber 5; an air outlet pipe 12 disposed in the top chamber 1; a first mounting frame 17 disposed inside the bottom chamber 5; a second mounting frame 21 disposed on the first mounting frame 17; an elastic element 16 disposed between the first mounting frame 17 and the second mounting frame 21; a vibration motor 18 disposed on the second mounting frame 21; and a first screen 20 disposed on the second mounting frame 21. The following components are included: a feeding tube 3, which is mounted on the top chamber 1; a spiral shaft 36, which is rotatably mounted inside the feeding tube 3; a spiral blade 39, which is mounted on the outer circumferential surface of the spiral shaft 36; both the feeding tube 3 and the spiral blade 39 are made of polytetrafluoroethylene; a first discharge port 4, which is mounted in the middle chamber 9 and located at one end of the first screen 20; a second discharge port 14, which is mounted in the middle chamber 9 and located at the other end of the first screen 20; a first electrode 27, which is mounted in the middle chamber 9 and located above the first discharge port 4; and a second electrode, which is mounted in the middle chamber 9 and located above the second discharge port 14.

[0021] The bottom chamber 5, the middle chamber 9, and the top chamber 1 are connected by fasteners to form a sorting chamber, in which copper and aluminum powder is fed for sorting.

[0022] Understandably, before sorting, strong magnetic force is needed to attract ferromagnetic materials, separating steel shells, iron sheets, etc., from the mixture to protect subsequent equipment and prevent damage from hard objects. Then, vibrating screening is performed to screen out most of the black powder, reducing the burden on subsequent equipment. The material obtained from vibrating screening is then fed into the sorting bin for further sorting.

[0023] The second mounting frame 21 is movably mounted on the first mounting frame 17. When the vibration motor 18 operates, it generates high-frequency vibration, which in turn drives the second mounting frame 21 to vibrate at a high frequency, thereby causing the first screen 20 to vibrate at a high frequency. Copper and aluminum powder is fed onto the first screen 20 through the feeding pipe 3. The air inlet pipe 19 is used to introduce an upward airflow into the sorting chamber, which then exits through the air outlet pipe 12. The upward airflow passes through the first screen 20 and continuously through the copper and aluminum powder layer, applying an upward buoyancy force to both the copper and aluminum powder. Furthermore, the first screen 20, driven by the vibration motor 18, generates high-frequency vibration, causing the copper and aluminum powder to be continuously thrown up and falling. Because the density of copper (8.9 g / cm³) is much greater than that of aluminum (2.7 g / cm³), the copper particles have greater inertia, making it difficult for the upward airflow to lift them. Therefore, the copper particles overcome the buoyancy of the airflow and settle tightly onto the first screen 20, generating significant friction with it. Conversely, aluminum particles are more easily lifted and suspended above the copper and aluminum powder by the buoyancy of the airflow. Due to the high friction between the copper particles and the first screen 20, the copper particles move obliquely upward following the direction of vibration. The aluminum particles, however, cannot be driven by vibration and can only slide obliquely downward under the control of gravity. Finally, the copper particles are discharged from the first outlet 4, and the aluminum particles are discharged from the second outlet 14, completing the separation.

[0024] The feeding tube 3 can be divided into three sections according to its function: an acceleration section, a friction section 35, and a flow equalization section 32. The part of the feeding tube 3 with the spiral vane 39 is the friction section 35. Copper and aluminum powders flow into the friction section 35 of the feeding tube 3 under the influence of the feed airflow. Since the work function of aluminum (4.08 eV) is significantly lower than that of copper (4.65 eV), copper particles generate negative charges due to friction with the polytetrafluoroethylene feeding tube 3 and the spiral vane 39 in the friction section 35, while aluminum particles generate positive charges due to friction. The spiral vane 39 inside the feeding tube 3 rotates under the action of the airflow. The rotation of the spiral vane 39 causes the copper and aluminum powders to be repeatedly thrown against the tube wall, strengthening the collision between the copper and aluminum powders and the feeding tube 3 or the spiral vane 39, enhancing the friction effect. Furthermore, the spiral vane 39 helps to increase the residence time of the copper and aluminum powders in the friction section 35, enhancing the friction effect. The rotation of the spiral vane 39 also plays a stirring role, breaking up the agglomeration of copper and aluminum powders, ensuring that each particle can be fully rubbed and facilitating subsequent gravity separation. Tribocharged copper and aluminum powder is fed onto the screen surface of the first screen 20 by a high-speed feed airflow. Due to the high airflow speed and the weak electrostatic adsorption between the copper and aluminum powders, the powders are not easily agglomerated under electrostatic force. The first electrode 27 and the second electrode form an electric field parallel to the screen surface of the first screen 20. The copper and aluminum powders fed onto the first screen 20 are subjected to this electric field, with the electric force on copper particles inclined upwards and the electric force on aluminum particles inclined downwards. By increasing the sieving dimensions through the electric field force, multi-dimensional screening is achieved, thereby realizing higher precision separation. Furthermore, the copper and aluminum powder sorting equipment of this application integrates electrostatic separation and gravity separation into one device, significantly improving the processing capacity per unit time, while occupying a small area and having a short process flow. It also enhances the adaptability of the copper and aluminum powder sorting equipment to the particle size of copper and aluminum powders. The copper and aluminum powder sorting equipment of this application can also process fine powders with a diameter of less than or equal to 0.5 mm, enhancing the practicality of the copper and aluminum powder sorting equipment.

[0025] Understandably, by adding the electric field dimension, the separation of copper and aluminum powders no longer relies solely on density differences, but also utilizes the new sieving basis of opposite polarities after triboelectric charging. Even if the copper and aluminum powders have similar densities or fine particle sizes, as long as their charge polarities are different, they can experience opposite forces in the electric field and separate along their trajectories. At the same time, the electric field strength and airflow velocity can be independently adjusted, making the process well adaptable to both coarse and fine particles. The recovery rate of fine metal powders is significantly improved, and the copper-aluminum intermixing rate is greatly reduced, ultimately achieving a purity and recovery rate higher than that of pure air separation.

[0026] The friction section 35 is provided with a first mounting plate 38 at its top. One end of the spiral shaft 36 is rotatably mounted on the first mounting plate 38 via a bearing 37. The flow equalization section 32 is provided with a second mounting plate 310 at its top. The second mounting plate 310 is provided with a shaft hole. The other end of the spiral shaft 36 is rotatably mounted on the second mounting plate 310.

[0027] Specifically, copper and aluminum powders flow into the friction section 35 of the feeding pipe 3 under the influence of the feeding airflow. Copper particles generate negative charges through friction with the polytetrafluoroethylene feeding pipe 3 and the spiral blade 39 in the friction section 35, while aluminum particles generate positive charges through friction. The copper and aluminum powders are then fed onto the first screen 20 through the feeding pipe 3. Under the high-frequency vibration of the first screen 20, copper particles are discharged from the first outlet 4, and aluminum particles are discharged from the second outlet 14, completing the separation. Furthermore, under the electric field formed by the first electrode 27 and the second electrode, the electric force on copper particles is inclined upwards, while the electric force on aluminum particles is inclined downwards. This electric field force increases the sieving dimensions, forming multi-dimensional screening, thereby achieving higher precision separation. Moreover, the copper and aluminum powder sorting equipment in this application integrates electrostatic separation and gravity separation into one device, significantly improving the processing capacity per unit time, and has a small footprint and short process flow.

[0028] See Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the system further includes: multiple ribs 33 spaced circumferentially on the inner wall of the distribution tube 3; and a first uniform distribution plate 312 disposed inside the distribution tube 3. The area of ​​the distribution tube 3 containing the multiple ribs 33 is the uniform flow section 32. The ribs 33 are integrally formed with the distribution tube 3 and are also made of polytetrafluoroethylene. The ribs 33 enhance the friction between the copper and aluminum powder and the distribution tube 3, and also enhance the structural strength of the distribution tube 3 itself. The first uniform distribution plate 312 has a number of uniform flow holes spaced apart. The first uniform distribution plate 312 can form a uniform, single-layer or quasi-single-layer distribution on the first sieve surface, so that the airflow and electric field energy can act on each copper and aluminum powder, avoiding separation failure due to excessive local material layer thickness.

[0029] The feeding tube 3 is provided with an annular limiting part 34, and the first material equalization plate 312 is connected to the annular limiting part 34 by welding. Since the first material equalization plate 312 is inclined, the density of the equalization holes in the lower part of the first material equalization plate 312 is large, and the density of the equalization holes in the upper part is small, which avoids the formation of powder accumulation in the lower part of the first material equalization plate 312 and reduces the probability of clogging.

[0030] See Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the system further includes: a second uniform material plate 313, which is disposed inside the material distribution tube 3; the second uniform material plate 313 is horizontally arranged, and a plurality of uniform flow holes are uniformly spaced on the second uniform material plate 313. The arrangement of the second uniform material plate 313 can form a uniform, single-layer or quasi-single-layer distribution on the first sieve surface, so that the airflow and electric field energy can act on each copper-aluminum powder, avoiding separation failure due to excessive local material layer thickness. An ultrasonic head 314 is disposed inside the material distribution tube 3. The ultrasonic head 314 breaks up agglomerates, improves dispersion, and inhibits secondary agglomeration of copper-aluminum powder during the friction process. The ultrasonic head 314 can also remove fine black powder or oxides adsorbed on the surface of copper-aluminum powder, improving the friction effect.

[0031] In this embodiment, a second annular limiting part 34 is provided on the feeding pipe 3, and the second uniform material plate 313 is connected to the annular limiting part 34 by welding. The arrangement of the second uniform material plate 313 and the first uniform material plate 312 can effectively reduce airflow loss and reduce the airflow speed to stably transport copper and aluminum powder, and can avoid the feeding airflow from having too much impact on the rising airflow.

[0032] See Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, in some embodiments, the system further includes: a third mounting bracket 24, which is connected to the central chamber 9 by fastening screws 23; plastic bolts 26, which respectively mount the first electrode 27 and the second electrode to the third mounting bracket 24; an insulating gasket 25, which is disposed between the first electrode 27, the second electrode and the third mounting bracket 24; and a nylon nut 28, which is screwed onto the plastic bolts 26 and abuts against the first electrode 27 and the second electrode respectively. Two mounting structures consisting of the third mounting bracket 24, fastening screws 23, insulating gaskets 25 and nylon nuts 28 are provided, one located above the first discharge port 4 and the other above the second discharge port 14, so that the first electrode 27 and the second electrode are respectively mounted above the first discharge port 4 and the second discharge port 14.

[0033] The first electrode 27 and the second electrode are made of stainless steel. The first electrode 27 and the second electrode are in the form of a mesh or grid to allow copper or aluminum powder to pass through and reduce air resistance. The lower end of the first electrode 27 and the second electrode are 100mm-150mm above the first sieve surface. The height of the first electrode 27 and the second electrode is 200mm-400mm. The thickness of the first electrode 27 and the second electrode is a thin plate of less than 5mm.

[0034] See Figure 1 , Figure 3 and Figure 4As shown, in some embodiments, the system further includes: a second screen 22 disposed on a second mounting frame 21, with a first screen 20 disposed above the second screen 22; the second screen 22 is welded to the second mounting frame 21; and a third discharge port 15 disposed in the central chamber 9 and located at the bottom of the second screen 22. Some material passing through the first screen 20 is intercepted by the second screen 22, preventing it from entering the air intake pipe 19. Furthermore, the second screen 22 is parallel to the first screen 20, and the small holes in the second screen 22 force the airflow to pass through in a direction perpendicular to the screen surface of the second screen 22, disrupting the original lateral flow component and transforming the rising airflow into an approximately vertical laminar flow. This reduces the impact of lateral disturbances on material stratification, improves the copper-aluminum separation accuracy, and the second screen 22 can effectively homogenize the airflow, allowing the copper-aluminum powder on the screen surface of the first screen 20 to form a stable and uniform fluidized bed.

[0035] See Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the system further includes multiple connectors 13 spaced apart from the second screen 22 and connected to the first screen 20. Four connectors 13 are provided, and the first screen 20 and the second screen 22 are connected by welding. The four connectors 13 and the central hopper 9 divide the first screen 20 and the second screen 22 into a feeding area, two intermediate areas, and two discharge areas. In the feeding area, the screen aperture diameter of the first screen 20 is 0.3mm-0.6mm, with an opening rate of 25%-30%, while the opening rate of the second screen 22 is 20%-30%. The low opening rates of the first and second screens 20 and 22 can generate higher air pressure, allowing the rising airflow to pass through the thicker copper-aluminum powder layer in the feeding area at a higher speed. This helps to instantly disperse agglomerated materials and achieve pre-separation. Furthermore, the high-speed, strong airflow lifts fine aluminum powder particles, preventing them from being missed, and quickly carries away the lower-density black powder. In the intermediate zone, the diameter of the screen openings of the first screen 20 is 0.5 mm to 1.0 mm, and the opening ratio of the first screen 20 is 35% to 40%. The opening ratio of the second screen 22 is 40% to 50%. The higher opening ratios of the first screen 20 and the second screen 22 are used to increase the airflow distribution, strengthen the copper-aluminum separation, allow aluminum particles to float and copper particles to sink, and facilitate the high-precision separation of copper and aluminum powders. In the discharge zone, the diameter of the screen openings of the first screen 20 is 0.3 mm to 0.5 mm, and the opening ratio of the first screen 20 is 30% to 35%. The opening ratio of the second screen 22 is 30% to 40%. The moderate airflow distribution and airflow velocity are conducive to the discharge of copper and aluminum powder particles.

[0036] See Figure 1 , Figure 3 and Figure 4As shown, in some embodiments, it further includes a reduced diameter section 31, which is disposed on the feed tube 3. The reduced diameter section 31 is an acceleration section of the feed tube 3, which is used to enhance the flow rate of the feed airflow and enhance the subsequent friction effect. The acceleration section and the friction section 35 are integrally formed and are mounted to the top chamber 1 by the third mounting plate 2, and the flow equalization section 32 is mounted to the top chamber 1 by the fourth mounting plate.

[0037] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the system further includes: a frame 6 disposed on one side of the bottom chamber 5; and a compressor 7 disposed on the frame 6 and connected to the air intake pipe 19. The compressor 7 is mounted to the frame 6 by fasteners and is used to generate an upward airflow.

[0038] Understandably, the outlet pipe 12 is equipped with a clamp 11 at its end, allowing it to connect to other pipes and direct the discharged airflow into the filter assembly to filter out black powder. The filtered airflow can then re-enter the compressor 7, creating a gas circulation. The rising airflow contains a large amount of nitrogen, and the oxygen concentration is ≤ 2%. During the continuous sorting process, the compressor 7 needs to continuously pump in supplementary gas to compensate for gas losses during the gas circulation process, maintaining a slightly positive pressure in the sorting chamber and preventing external gas intrusion.

[0039] See Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, it further includes a flow equalization cone sleeve disposed at the end of the air inlet pipe 19. The flow equalization cone sleeve is used to homogenize the airflow, so that the copper and aluminum powder on the sieve surface of the first sieve 20 forms a stable and uniform fluidized bed.

[0040] See Figure 1 and Figure 3 As shown, in some embodiments, a reinforcing rod 10 is also included, with one end of the reinforcing rod 10 connected to the bottom chamber 5 and the other end connected to the top chamber 1. The reinforcing rod 10 is connected to the bottom chamber 5 and the top chamber 1 by fasteners, thereby improving the structural rigidity of the sorting chamber.

[0041] In this embodiment, the bottom of the bottom chamber 5 is provided with support legs 8. The copper-aluminum powder sorting equipment can meet the requirements for the on-charge crushing of waste ternary batteries (including lithium iron phosphate); capacity: ≥1.5 tons / hour, based on 1.5 tons / hour, assuming 24-hour production, the total output for 330 days a year is ≥10,000 tons, battery powder purity ≥98%, copper ≤1%, aluminum ≤1% in battery powder; copper particles contain ≥96% copper, aluminum less than 3% aluminum, and black powder ≤2% copper; aluminum particles contain ≥88% aluminum, copper less than 3% aluminum, and black powder ≤3% aluminum; battery powder recovery rate ≥98%.

[0042] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A copper-aluminum powder sorting device for lithium battery recycling, comprising a bottom chamber (5), a middle chamber (9) connected to the bottom chamber (5), and a top chamber (1) connected to the middle chamber (9), characterized in that, Also includes: An air intake pipe (19) is provided in the bottom compartment (5); An exhaust pipe (12) is provided in the top compartment (1); The first mounting bracket (17) is disposed inside the bottom compartment (5); The second mounting bracket (21) is disposed on the first mounting bracket (17); An elastic element (16) is disposed between the first mounting bracket (17) and the second mounting bracket (21); Vibration motor (18), which is mounted on the second mounting bracket (21); The first screen (20) is mounted on the second mounting bracket (21); Fabric pipe (3), which is installed on the top compartment (1); A spiral shaft (36) is rotatably disposed inside the fabric tube (3); The rotor (39) is disposed on the outer circumferential surface of the helical shaft (36), and both the fabric tube (3) and the rotor (39) are made of polytetrafluoroethylene. The first discharge port (4) is located in the middle chamber (9) and at one end of the first screen (20); The second discharge port (14) is located in the middle chamber (9) and at the other end of the first screen (20); The first electrode (27) is disposed in the middle chamber (9) and located above the first discharge port (4); The second electrode is disposed in the middle chamber (9) and located above the second discharge port (14).

2. The copper-aluminum powder sorting equipment for lithium battery recycling according to claim 1, characterized in that, Also includes: Multiple ribs (33) are arranged circumferentially on the inner wall surface of the fabric tube (3); The first uniform material plate (312) is disposed inside the material distribution tube (3).

3. The copper-aluminum powder sorting equipment for lithium battery recycling according to claim 2, characterized in that, Also includes: The second uniform material plate (313) is disposed inside the material distribution tube (3); An ultrasonic head (314) is disposed inside the fabric tube (3).

4. The copper-aluminum powder sorting equipment for lithium battery recycling according to claim 1, characterized in that, Also includes: The third mounting bracket (24) is connected to the central compartment (9) by fastening screws (23); Plastic bolts (26) are used to mount the first electrode (27) and the second electrode to the third mounting bracket (24), respectively. An insulating pad (25) is provided between the first electrode (27) and the second electrode and the third mounting bracket (24). A nylon nut (28) is screwed onto the plastic bolt (26) and abuts against the first electrode (27) and the second electrode, respectively.

5. The copper-aluminum powder sorting equipment for lithium battery recycling according to claim 1, characterized in that, Also includes: The second screen (22) is disposed on the second mounting bracket (21), and the first screen (20) is disposed above the second screen (22); The third discharge port (15) is located in the middle chamber (9) and at the bottom of the second screen (22).

6. The copper-aluminum powder sorting equipment for lithium battery recycling according to claim 5, characterized in that, Also includes: Multiple connectors (13) are spaced apart on the second screen (22) and connected to the first screen (20).

7. A copper-aluminum powder sorting device for lithium battery recycling according to claim 2, characterized in that, Also includes: A reduced diameter section (31) is provided in the fabric tube (3).

8. The copper-aluminum powder sorting equipment for lithium battery recycling according to claim 1, characterized in that, Also includes: A frame (6) is provided on one side of the bottom compartment (5); A compressed air fan (7) is disposed on the frame (6) and connected to the air intake pipe (19).

9. A copper-aluminum powder sorting device for lithium battery recycling according to claim 8, characterized in that, Also includes: A flow equalization cone sleeve is provided at the end of the air intake pipe (19).

10. A copper-aluminum powder sorting device for lithium battery recycling according to claim 1, characterized in that, Also includes: A reinforcing rod (10) is provided, with one end of the reinforcing rod (10) connected to the bottom compartment (5) and the other end of the reinforcing rod (10) connected to the top compartment (1).

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