Lithium battery glue injection module valuable component recovery method

Abstract

The invention discloses a method for recycling valuable components of a lithium battery glue injection module, which comprises the following steps of: integrally discharging: integrally discharging the module, reducing the voltage of the module to be less than 3V, and then entering a crushing system for primary crushing; the lithium battery glue injection module is subjected to crushing treatment through a crushing system, and a primary crushed material with the particle size smaller than or equal to 50 mm is obtained; and high-temperature pyrolysis treatment: conveying the primarily crushed material into a pyrolysis furnace through a screw conveyor, removing the plastic and the adhesive in the primarily crushed material through pyrolysis to obtain a pyrolyzed material, continuously introducing inert gas in the pyrolysis process, and enabling waste gas generated in the pyrolysis process to enter an environment-friendly system to be subjected to up-to-standard emission treatment. According to the method, black powder entrained in crushed aluminum particles can be recycled through an alkaline leaching method, the generated sodium metaaluminate solution is fed into the aluminum precipitation wire, explosion during aluminum crushing is effectively avoided, aluminum can be recycled, and no hazardous waste is generated in the process.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-ion battery recycling, and in particular to a method for recycling valuable components of a lithium battery glue injection module. Background Art

[0002] With the rapid development of new energy vehicles, energy storage systems and consumer electronics industries, lithium-ion batteries have become the core components of the global energy storage field due to their advantages such as high energy density and long cycle life. According to statistics, the global lithium battery market size will exceed US$100 billion in 2023, accompanied by a surge in the amount of scrapped lithium batteries. It is estimated that by 2030, the total amount of retired lithium batteries in the world will exceed 5 million tons. If efficient recycling is not achieved, a large number of discarded batteries containing heavy metals (such as cobalt, nickel, manganese), toxic electrolytes (such as lithium hexafluorophosphate) and organic adhesives will pose a serious threat to the ecological environment and human health;

[0003] Traditional lithium battery recycling technology primarily focuses on metal extraction from cathode materials (such as ternary materials and lithium iron phosphate), recovering high-value elements such as cobalt and nickel through physical crushing, hydrometallurgy, or pyrometallurgy. However, the recycling of glue-injected lithium battery modules (i.e., battery modules that use adhesives such as epoxy resin and polyurethane to integrally encapsulate and reinforce the battery cells, connectors, and housing) faces key bottlenecks such as low adhesive separation efficiency, low resource utilization of all components, a lack of systematic recycling solutions, and high recycling costs. Summary of the Invention

[0004] This invention proposes a method for recovering valuable components from lithium battery injection modules. This method avoids the use of chemical reagents for degumming while recovering valuable components from the module. Furthermore, the use of a pyrolysis process reduces the need for subsequent sorting and recycling equipment and processes, lowering recycling costs and achieving efficient and green lithium battery disassembly. This technology system provides a complete solution for green lithium battery recycling characterized by "efficient separation, low carbon emissions, and energy efficiency, while ensuring safety and controllability," promoting the establishment of a closed-loop sustainable development system for the new energy industry.

[0005] The technical solution of the present invention is achieved as follows:

[0006] A method for recovering valuable components of a lithium battery glue injection module, comprising:

[0007] Overall discharge: discharge the module as a whole, reduce the module voltage to below 3V, and then enter the crushing system for preliminary crushing;

[0008] Initial module crushing: The lithium battery injection module is crushed by the crushing system to obtain primary crushed materials with a particle size of ≤50mm;

[0009] High-temperature pyrolysis treatment: The primary crushed material is transported to the pyrolysis furnace through a screw conveyor, and the plastic and adhesive in the primary crushed material are removed by pyrolysis to obtain pyrolysis material. During the pyrolysis process, inert gas is continuously introduced. The waste gas generated during the pyrolysis process enters the environmental protection system for emission treatment to meet the standards. The inert gas introduction rate is maintained at 10L / min.

[0010] Primary screening: Use a linear screen to screen the pyrolysis material, separate the battery powder from the copper and aluminum shells in the pyrolysis material, and obtain the under-screen battery powder. The over-screen material includes the remaining shell, copper and aluminum mixture, and incompletely dissociated pole pieces. The over-screen material enters the airflow sorting process;

[0011] Airflow sorting: After the first screening, the screened material passes through the airflow sorting device, and the shell fragments are sorted out by vertical airflow, leaving the primary copper-aluminum mixed material and the remaining flake battery powder;

[0012] Disintegration treatment: The primary copper-aluminum mixture and the remaining flake battery powder are finely crushed and dispersed by a disintegration device to obtain a dispersed material;

[0013] Secondary screening: Use a circular rotary vibrating screen to screen the bulk material, select the battery powder in the bulk material, and leave the secondary copper-aluminum mixed material in the bulk material;

[0014] Copper and aluminum separation: The secondary copper and aluminum mixed materials are finally separated by copper and aluminum separation equipment.

[0015] Preferably, in the overall discharging step, the discharging device may adopt one of salt water discharge and discharge device discharge.

[0016] Preferably, the preliminary crushing step of the module needs to be carried out in an inert gas atmosphere and slightly negative pressure conditions, the oxygen content of the crushing system is controlled below 5%, the crushing particle size is ≤50mm, and the crushing system uses a double-shaft shredder to crush the module into primary crushed materials ≤50mm. The double-shaft shredder is a fixed-frequency device.

[0017] Preferably, in the high-temperature pyrolysis step, the pyrolysis furnace can be a tunnel furnace that rotates while pyrolyzing. The pyrolysis temperature of the pyrolysis furnace is controlled at 450-650°C, and the pyrolysis treatment time is controlled at 10-60 minutes. During the pyrolysis process, an inert gas, such as nitrogen or carbon dioxide, needs to be continuously introduced. The gas generated during the pyrolysis process enters the environmental protection system through an exhaust pipe for purification treatment. After treatment, the gas meets emission standards. The inert gas introduction rate is maintained at 10 L / min.

[0018] Preferably, the environmental protection system includes an incinerator, a two-stage alkali spray and a bag dust collector, wherein the temperature of the incinerator is controlled above 850°C and the waste gas residence time is ≥2 seconds.

[0019] Preferably, in the primary screening step, the linear screen is a linear vibrating screen, a 70-80 mesh screen is selected, and the linear vibrating screen is a fixed frequency device.

[0020] Preferably, in the airflow sorting step, the airflow sorting equipment is a vertical airflow sorter, and the vertical airflow speed is 5-10 m / s.

[0021] Preferably, an industrial ball mill is used in the disintegration equipment, and the grinding medium of the industrial ball mill is steel balls with a diameter of 20mm-100mm. During the disintegration process, the steel ball filling rate is controlled at 25%-45%, and the speed of the industrial ball mill is controlled at 20-40r / min. The speed of the ball mill can be adjusted according to the material state.

[0022] Preferably, in the secondary screening step, the circular rotary vibration screening uses a 120-mesh screen.

[0023] Preferably, in the copper and aluminum sorting step, the copper and aluminum sorting equipment is an air shaker, wherein the upper induced air frequency is controlled at 15-25 Hz, the vibration frequency is controlled at 20-30 Hz, and the screen angle is 15-30°.

[0024] Beneficial effects:

[0025] The present invention adopts a safe and efficient discharge process, which reduces the module voltage to below 3V through overall discharge, effectively avoiding the risk of short circuit, fire or explosion caused by residual electricity in the subsequent crushing process, and improving operational safety.

[0026] The present invention adopts modular crushing and pyrolysis collaborative processing, using preliminary crushing (≤50mm) combined with high-temperature pyrolysis process to thoroughly decompose plastics and adhesives, avoiding the material adhesion problem caused by traditional mechanical separation, and improving the separation efficiency of metal and battery powder.

[0027] The present invention has the advantage of adaptability in multiple scenarios and is compatible with various lithium battery module structures such as soft-pack, square, cylindrical, etc. It breaks through the technical bottleneck of traditional recycling processes for injection module processing, fills the industry's gap in high-bonding strength colloid separation, and its applicability covers more than 90% of mainstream lithium battery models.

[0028] This invention offers both safety and economic benefits. The pyrolysis process is carried out under inert gas protection, preventing the combustion of organic matter and the generation of harmful gases. Meanwhile, waste gases are treated by an environmental protection system to meet emission standards, meeting green recycling requirements and reducing environmental pollution. The simplified process provides a foundation for subsequent automated production line design, demonstrating the potential for large-scale industrialization. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a process flow chart of a method for recovering valuable components of a lithium battery glue injection module according to an embodiment of the present invention;

[0031] Figure 2 The present invention is a flowchart of a method for recovering valuable components of a lithium battery injection module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0033] According to an embodiment of the present invention, a method for recovering valuable components of a lithium battery glue injection module is provided.

[0034] like Figure 1 As shown, in this optional embodiment, the method for preparing high-purity lithium carbonate according to an embodiment of the present invention includes:

[0035] Step S101, overall discharge: discharge the module as a whole, reduce the module voltage to below 3V, and then enter the crushing system for preliminary crushing;

[0036] Step S103, preliminary module crushing: the lithium battery injection module is crushed by a crushing system to obtain a primary crushed material with a particle size of ≤50mm;

[0037] Step S105, high-temperature pyrolysis treatment: The primary crushed material is conveyed by a screw conveyor and placed in a pyrolysis furnace, where plastics and adhesives in the primary crushed material are removed by pyrolysis to obtain a pyrolysis material. During the pyrolysis process, inert gas is continuously introduced. The waste gas generated during the pyrolysis process enters the environmental protection system for emission treatment to meet the standards. The inert gas introduction rate is maintained at 10 L / min.

[0038] Step S107, primary screening: a linear screen is used to screen the pyrolysis material to separate the battery powder from the copper and aluminum shells in the pyrolysis material, obtaining undersize battery powder. The oversize material includes the remaining shell, copper and aluminum mixture, and incompletely dissociated electrode pieces. The oversize material enters the airflow sorting process;

[0039] Step S109, airflow sorting: the oversize material after the primary screening passes through an airflow sorting device, where the shell fragments are sorted out by vertical airflow, leaving the primary copper-aluminum mixture and the remaining flake battery powder;

[0040] Step S111, breaking up processing: the primary copper-aluminum mixture material and the remaining flake battery powder are finely crushed and broken up by a breaking up device to obtain a broken up material;

[0041] Step S113, secondary screening: Use a circular rotary vibrating screen to screen the bulk material, select the battery powder in the bulk material, and leave the secondary copper-aluminum mixed material in the bulk material;

[0042] Step S115, copper and aluminum separation: the secondary copper and aluminum mixed material is finally separated into copper and aluminum materials by copper and aluminum separation equipment.

[0043] In this optional embodiment, in the overall discharging step, the discharging device may use either salt water discharge or discharge device discharge.

[0044] In this optional embodiment, the preliminary crushing step of the module needs to be carried out in an inert gas atmosphere and slightly negative pressure conditions, the oxygen content of the crushing system is controlled below 5%, the crushing particle size is ≤50mm, and the crushing system uses a double-shaft shredder to crush the module into primary crushed materials ≤50mm. The double-shaft shredder is a fixed-frequency device.

[0045] In this optional embodiment, during the high-temperature pyrolysis step, the pyrolysis furnace may be a tunnel furnace that rotates while pyrolyzing. The pyrolysis temperature of the pyrolysis furnace is controlled between 450°C and 650°C, and the pyrolysis treatment time is controlled between 10 and 60 minutes. During the pyrolysis process, an inert gas, such as nitrogen or carbon dioxide, is continuously introduced. The gases generated during the pyrolysis process are purified through an exhaust pipe in an environmental protection system. After treatment, the gases meet emission standards. The inert gas introduction rate is maintained at 10 L / min.

[0046] In this optional embodiment, the environmental protection system includes an incinerator, a two-stage alkali spray and a bag dust collector, wherein the temperature of the incinerator is controlled above 850°C and the waste gas residence time is ≥2 seconds.

[0047] In this optional embodiment, in the primary screening step, the linear screen is a linear vibrating screen, a 70-80 mesh screen is selected, and the linear vibrating screen is a fixed frequency device.

[0048] In this optional embodiment, in the airflow sorting step, the airflow sorting equipment is a vertical airflow sorter, and the vertical airflow speed is 5-10 m / s.

[0049] In this optional embodiment, an industrial ball mill is used as the disintegration equipment, and steel balls are selected as the grinding media of the industrial ball mill. The diameter of the steel balls is 20mm-100mm. During the disintegration process, the steel ball filling rate is controlled at 25%-45%, and the speed of the industrial ball mill is controlled at 20-40r / min. The speed of the ball mill can be adjusted according to the material state.

[0050] Preferably, in the secondary screening step, the circular rotary vibration screening uses a 120-mesh screen.

[0051] Preferably, in the copper and aluminum sorting step, the copper and aluminum sorting equipment is an air shaker, wherein the upper induced air frequency is controlled at 15-25 Hz, the vibration frequency is controlled at 20-30 Hz, and the screen angle is 15-30°.

[0052] In order to facilitate understanding of the above technical solutions of the present invention, the above technical solutions of the present invention are further described below through a number of specific embodiments.

[0053] Example 1

[0054] like Figure 2 As shown, in specific applications, the process of the valuable component recovery method of the lithium battery injection module can be as follows:

[0055] The lithium battery injection module is placed in a salt water pool for immersion and discharge treatment for 24 hours. After the immersion is completed, the module is drained and placed on a feed belt conveyor to be transported to the crushing system for preliminary crushing;

[0056] After overall discharge, the module enters the double-shaft crusher for crushing to obtain primary crushed materials. During the crushing process, nitrogen should be continuously introduced. At the same time, the crushing system needs to be equipped with a negative pressure fan to keep the crushing system in a slightly negative pressure state at all times to avoid excessive oxygen content in the crushing system and thermal runaway of the battery materials. The exhaust gas generated by the crushing system and the subsequent pyrolysis exhaust gas are sent to the environmental protection system for treatment;

[0057] After crushing, the primary crushed materials are transported to the pyrolysis furnace through a screw conveyor. A sealed tunnel furnace is used as the pyrolysis furnace for pyrolysis. The materials are discharged while pyrolysis is carried out to obtain pyrolysis materials. The pyrolysis temperature is set at 600°C and the pyrolysis time is not less than 10 minutes. The exhaust gas generated during the pyrolysis process enters the environmental protection system through the exhaust pipe for treatment;

[0058] After pyrolysis, the pyrolysis material is conveyed to a linear screen by a screw conveyor for primary screening. The screen aperture is 70 mesh, and the battery powder detached after pyrolysis is selected. The copper and aluminum shells enter the vertical airflow separator for sorting. After passing through the vertical airflow separator, the wind speed of the vertical airflow separator is 5m / s, and the materials are divided into heavy materials and light materials. The shell fragments are selected as heavy materials through the heavy material discharge port. The primary copper and aluminum mixed materials and the remaining flake battery powder are conveyed to the industrial ball mill by a belt conveyor for dispersion treatment to obtain dispersed materials;

[0059] The industrial ball mill uses steel balls as grinding media. The diameters of the steel balls are 20mm, 40mm, 60mm, and 100mm respectively. During the grinding process, the steel ball filling rate is controlled at 30%. The speed of the industrial ball mill is 30r / min. After the material is broken up by the industrial ball mill, the particle size of the material will be more uniform. At the same time, the flaky battery powder in the material is broken up, which is convenient for subsequent screening and copper and aluminum separation processes.

[0060] The bulk material is conveyed to a single-layer circular rotary vibrating screen by a sealed screw conveyor for secondary screening. The mesh size of the rotary vibrating screen can be 120 mesh to separate the copper-aluminum mixture from the battery powder. The battery powder is collected in a battery powder transfer bin, and the copper-aluminum mixture enters the copper-aluminum sorting stage.

[0061] An air shaker is used to separate copper and aluminum. The air frequency is controlled at 20Hz, the vibration frequency is controlled at 25Hz, and the screen angle is 20°. At this point, the separation of valuable components in the module is completed.

[0062] The waste gas generated by the crushing system and pyrolysis first enters the incinerator for high-temperature incineration. The small molecular gas after high-temperature decomposition is adsorbed by a two-stage series-connected alkali spray tower, and the remaining gas is treated by a bag dust collector before being discharged in compliance with the standards.

[0063] Example 2

[0064] like Figure 2 As shown, in specific applications, the process of the valuable component recovery method of the lithium battery injection module can be as follows:

[0065] The lithium battery injection module is placed in a salt water pool for immersion and discharge treatment for 24 hours. After the immersion is completed, the module is drained and placed on a feed belt conveyor to be transported to the crushing system for preliminary crushing.

[0066] After overall discharge, the module enters the double-shaft crusher for crushing to obtain primary crushed materials. During the crushing process, nitrogen should be continuously introduced. At the same time, the crushing system needs to be equipped with a negative pressure fan to keep the crushing system in a slightly negative pressure state at all times to avoid excessive oxygen content in the crushing system and thermal runaway of the battery materials. The exhaust gas generated by the crushing system and the subsequent pyrolysis exhaust gas are sent to the environmental protection system for treatment;

[0067] After crushing, the primary crushed materials are transported to the pyrolysis furnace through a screw conveyor. A sealed tunnel furnace is used as the pyrolysis furnace for pyrolysis. The materials are discharged while pyrolysis is carried out to obtain pyrolysis materials. The pyrolysis temperature is set at 500°C and the pyrolysis time is not less than 20 minutes. The exhaust gas generated during the pyrolysis process enters the environmental protection system through the exhaust pipe for treatment;

[0068] After pyrolysis, the material is conveyed to a linear screen by a screw conveyor for primary screening. The screen has an aperture of 80 meshes, and the battery powder shed after pyrolysis is selected. The copper and aluminum shells enter the vertical airflow separator for sorting. After passing through the vertical airflow separator, the wind speed of the vertical airflow separator is 5m / s, and the materials are divided into heavy materials and light materials. The shell fragments are selected as heavy materials through the heavy material discharge port. The primary copper and aluminum mixed materials and the remaining flaky battery powder are conveyed to the industrial ball mill by a belt conveyor for dispersion processing.

[0069] The industrial ball mill uses steel balls as grinding media. The diameters of the steel balls are 20mm, 40mm, 60mm, and 100mm respectively. During the grinding process, the steel ball filling rate is controlled at 25%. The speed of the industrial ball mill is 40r / min. After the material is broken up by the industrial ball mill, the particle size of the material will be more uniform. At the same time, the flaky battery powder in the material is broken up, which is convenient for subsequent screening and copper and aluminum separation processes.

[0070] The bulk material is conveyed to a single-layer circular rotary vibrating screen by a sealed screw conveyor for secondary screening. The mesh size of the rotary vibrating screen can be 120 mesh to separate the copper-aluminum mixture from the battery powder. The battery powder is collected in a battery powder transfer bin, and the copper-aluminum mixture enters the copper-aluminum sorting stage.

[0071] An air shaker is used to separate copper and aluminum. The air frequency is controlled at 20Hz, the vibration frequency is controlled at 25Hz, and the screen angle is 20°. At this point, the separation of valuable components in the module is completed.

[0072] The waste gas generated by the crushing system and pyrolysis first enters the incinerator for high-temperature incineration. The small molecular gas after high-temperature decomposition is adsorbed by a two-stage series-connected alkali spray tower, and the remaining gas is treated by a bag dust collector before being discharged in compliance with the standards.

[0073] Example 3

[0074] like Figure 2 As shown, in specific applications, the process of the valuable component recovery method of the lithium battery injection module can be as follows:

[0075] The lithium battery injection module is placed in a salt water pool for immersion and discharge treatment for 24 hours. After the immersion is completed, the module is drained and placed on a feed belt conveyor to be transported to the crushing system for preliminary crushing.

[0076] After overall discharge, the module enters the double-shaft crusher for crushing to obtain primary crushed materials. During the crushing process, nitrogen should be continuously introduced. At the same time, the crushing system needs to be equipped with a negative pressure fan to keep the crushing system in a slightly negative pressure state at all times to avoid excessive oxygen content in the crushing system and thermal runaway of the battery materials. The exhaust gas generated by the crushing system and the subsequent pyrolysis exhaust gas are sent to the environmental protection system for treatment;

[0077] After crushing, the primary crushed materials are transported to the pyrolysis furnace through a screw conveyor. A sealed tunnel furnace is used as the pyrolysis furnace for pyrolysis. The materials are discharged while pyrolysis is taking place to obtain pyrolysis materials. The pyrolysis temperature is set at 550°C and the pyrolysis time is not less than 45 minutes. The waste gas generated during the pyrolysis process enters the environmental protection system through the exhaust pipe for treatment.

[0078] After pyrolysis, the material is conveyed to a linear screen by a screw conveyor for primary screening. The screen has an aperture of 70 meshes, and the battery powder shed after pyrolysis is selected. The copper and aluminum shells enter the vertical airflow separator for sorting. After passing through the vertical airflow separator, the wind speed of the vertical airflow separator is 5m / s, and the materials are divided into heavy materials and light materials. The shell fragments are selected as heavy materials through the heavy material discharge port. The primary copper and aluminum mixed materials and the remaining flaky battery powder are conveyed to the industrial ball mill by a belt conveyor for dispersion processing.

[0079] The industrial ball mill uses steel balls as the grinding medium. The diameters of the steel balls are 20mm, 40mm, 60mm, and 100mm. During the grinding process, the steel ball filling rate is controlled at 30%, and the industrial ball mill speed is 30r / min. The material is broken up by the industrial ball mill, and the particle size becomes more uniform. At the same time, the flaky battery powder in the material is broken up, which facilitates the subsequent screening and copper and aluminum separation processes.

[0080] The bulk material is conveyed to a single-layer circular rotary vibrating screen by a sealed screw conveyor for secondary screening. The mesh size of the rotary vibrating screen can be 120 mesh to separate the copper-aluminum mixture from the battery powder. The battery powder is collected in a battery powder transfer bin, and the copper-aluminum mixture enters the copper-aluminum sorting stage.

[0081] An air shaker is used to separate copper and aluminum. The air frequency is controlled at 20Hz, the vibration frequency is controlled at 25Hz, and the screen angle is 20°. At this point, the separation of valuable components in the module is completed.

[0082] The waste gas generated by the crushing system and pyrolysis first enters the incinerator for high-temperature incineration. The small molecular gas after high-temperature decomposition is adsorbed by a two-stage series-connected alkali spray tower, and the remaining gas is treated by a bag dust collector before being discharged in compliance with the standards.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for recovering valuable components from a lithium battery injection module, characterized in that: include: Overall discharge: discharge the module as a whole, reduce the module voltage to below 3V, and then enter the crushing system for initial crushing; Initial module crushing: The lithium battery injection module is crushed by the crushing system to obtain primary crushed materials with a particle size of ≤50mm; High-temperature pyrolysis treatment: The primary crushed material is transported to the pyrolysis furnace through a screw conveyor, and the plastic and adhesive in the primary crushed material are removed by pyrolysis to obtain pyrolysis material. During the pyrolysis process, inert gas is continuously introduced. The waste gas generated during the pyrolysis process enters the environmental protection system for emission treatment to meet the standards. The inert gas introduction rate is maintained at 10L / min. Primary screening: Use a linear screen to screen the pyrolysis material, separate the battery powder from the copper and aluminum shells in the pyrolysis material, and obtain the under-screen battery powder. The over-screen material includes the remaining shell, copper and aluminum mixture, and incompletely dissociated pole pieces. The over-screen material enters the airflow sorting process; Airflow sorting: After the first screening, the screened material passes through the airflow sorting device, and the shell fragments are sorted out by vertical airflow, leaving the primary copper-aluminum mixed material and the remaining flake battery powder; Disintegration treatment: The primary copper-aluminum mixture and the remaining flake battery powder are finely crushed and dispersed by a disintegration device to obtain a dispersed material; Secondary screening: Use a circular rotary vibrating screen to screen the bulk material, select the battery powder in the bulk material, and leave the secondary copper-aluminum mixed material in the bulk material; Copper and aluminum separation: The secondary copper and aluminum mixed materials are finally separated by copper and aluminum separation equipment.

2. The method for recovering valuable components of a lithium battery glue injection module according to claim 1, characterized in that: In the overall discharging step, the discharging device may adopt one of salt water discharge and discharge device discharge.

3. The method for recovering valuable components of a lithium battery glue injection module according to claim 1, characterized in that: The initial crushing step of the module needs to be carried out in an inert gas atmosphere and slightly negative pressure conditions. The oxygen content of the crushing system is controlled below 5%, and the crushing particle size is ≤50mm. The crushing system uses a double-shaft shredder to crush the module into primary crushed materials ≤50mm. The double-shaft shredder is a fixed-frequency device.

4. The method for recovering valuable components from a lithium battery glue injection module according to claim 1, wherein: In the high-temperature pyrolysis treatment step, the pyrolysis furnace can be a tunnel furnace, which rotates while pyrolyzing during the pyrolysis process. The pyrolysis temperature of the pyrolysis furnace is controlled at 450-650°C, and the pyrolysis treatment time is controlled at 10-60 minutes. During the pyrolysis process, it is necessary to continuously introduce inert gas, and the inert gas is nitrogen or carbon dioxide. The gas generated during the pyrolysis process enters the environmental protection system through the exhaust pipe for purification treatment. After treatment, the gas meets the emission standards, and the inert gas introduction amount is maintained at 10L / min.

5. The method for recovering valuable components of a lithium battery glue injection module according to claim 5, characterized in that: The environmental protection system includes an incinerator, a two-stage alkali spray and a bag dust collector, wherein the temperature of the incinerator is controlled above 850°C and the waste gas residence time is ≥2 seconds.

6. The method for recovering valuable components of a lithium battery glue injection module according to claim 1, characterized in that: In the primary screening step, the linear screen is a linear vibrating screen, a 70-80 mesh screen is selected, and the linear vibrating screen is a fixed frequency device.

7. The method for recovering valuable components from a lithium battery glue injection module according to claim 1, wherein: In the airflow sorting step, the airflow sorting equipment is a vertical airflow sorter with a vertical airflow speed of 5-10 m / s.

8. The method for recovering valuable components from a lithium battery glue injection module according to claim 1, wherein: An industrial ball mill is used in the disintegration equipment. The grinding media of the industrial ball mill are steel balls with a diameter of 20mm-100mm. During the disintegration process, the steel ball filling rate is controlled at 25%-45%. The speed of the industrial ball mill is controlled at 20-40r / min, and the speed of the ball mill can be adjusted according to the material state.

9. The method for recovering valuable components from a lithium battery glue injection module according to claim 1, wherein: In the secondary screening step, the circular rotary vibration screening uses a 120-mesh screen.

10. The method for recovering valuable components from a lithium battery glue injection module according to claim 1, characterized in that: In the copper and aluminum sorting step, the copper and aluminum sorting equipment is an air shaker, wherein the upper induced air frequency is controlled at 15-25 Hz, the vibration frequency is controlled at 20-30 Hz, and the screen angle is 15-30°.

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