CN113908977A - Recovery process of waste lithium battery - Google Patents
Recovery process of waste lithium battery Download PDFInfo
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- CN113908977A CN113908977A CN202111314639.3A CN202111314639A CN113908977A CN 113908977 A CN113908977 A CN 113908977A CN 202111314639 A CN202111314639 A CN 202111314639A CN 113908977 A CN113908977 A CN 113908977A
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- copper
- waste lithium
- powder
- lithium batteries
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 33
- 239000002699 waste material Substances 0.000 title claims abstract description 30
- 238000011084 recovery Methods 0.000 title claims abstract description 16
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000011888 foil Substances 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000000197 pyrolysis Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000010008 shearing Methods 0.000 claims abstract description 7
- 239000003792 electrolyte Substances 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 6
- 239000002033 PVDF binder Substances 0.000 claims abstract description 5
- 239000003292 glue Substances 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims description 18
- 230000005484 gravity Effects 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 10
- 239000012452 mother liquor Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000010970 precious metal Substances 0.000 claims description 2
- 238000005201 scrubbing Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000011085 pressure filtration Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000428 dust Substances 0.000 abstract description 9
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 230000002269 spontaneous effect Effects 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 239000010926 waste battery Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 abstract description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- -1 lithium hexafluorophosphate Chemical compound 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a recovery process of waste lithium batteries. According to the invention, the waste lithium ion batteries are disassembled through shearing and crushing, then the waste lithium ion batteries enter a pyrolysis furnace for high-temperature pyrolysis, the PVDF glue and the electrolyte on the waste lithium battery pole pieces are pyrolyzed in a high-temperature anaerobic state, the pyrolyzed materials directly enter a hydrodynamic sorting system for sorting, so that the shell pile heads in the waste batteries are separated from copper-aluminum foil pole powder, and the copper-aluminum foil is further stripped from the pole powder attached to the surface through a wet stripping system. The battery powder from the pyrolysis system does not need to be subjected to processes such as dry screening or wind sorting, the battery powder directly enters the water power sorting to avoid dust raising of the electrode powder, and because lithium-containing compounds and graphite powder in the battery are electric conductors and combustible materials, if the powder dust raises and adheres to an electrical switch for a long time in the sorting process, electrical short circuit and ignition spontaneous combustion are easily caused, and potential safety hazards exist.
Description
Technical Field
The invention relates to recovery of lithium batteries, in particular to a recovery process of waste lithium batteries.
Background
China has become the largest new energy automobile market in the world, the sales volume of electric automobiles is 7 thousands in 2014, 30 thousands in 2015, and 50 thousands in 2016. The scrappage of the power battery is increased along with the gradual expiration of the service life of the battery of the key part of the electric automobile. The accumulated retirement amount of the power battery in China reaches about 20 ten thousand tons in 2020, and the number is increased to about 78 ten thousand tons by 2025.
The scrapped lithium ion battery contains lithium hexafluorophosphate, carbonate organic matters, heavy metals such as cobalt, lithium, copper and the like and plastics, which are valuable resources and have extremely high recovery value. At present, the recovery of waste power lithium ion batteries mainly has 2 modes: firstly, the echelon is utilized, secondly disassemble the recovery, can't continue to use to the battery that battery capacity drops to below 50%, can only disassemble the battery and resource recycle, to the condemned battery of echelon utilization simultaneously, finally also need disassemble and resource recycle.
The lithium ion battery is composed of a shell, a positive plate (aluminum foil), positive powder (lithium-containing compound), a negative plate (copper foil), negative powder (graphite), electrolyte, a diaphragm and the like, wherein each part of the lithium ion battery is separated out to the maximum extent by adopting a mechanical method, a physical method, a chemical method and the like in the disassembling process, so that the recycling rate of the lithium ion battery is improved, the economic benefit and the social benefit are maximized, and the aim of reducing environmental pollution is fulfilled.
The existing process is that after being crushed and pyrolyzed, waste batteries are separated into pole powder, copper aluminum foil and a shell pile head by a dry screening or wind power winnowing technology, the process has the phenomena of dust flying of the positive and negative pole powder, potential safety hazards such as electrical short circuit, ignition and spontaneous combustion and the like, the influence on the field air environment and noise is great, the body health of workers is seriously influenced, and the process also needs to be provided with high-suction dust collection and purification equipment, so that the system operation cost and the investment cost are increased.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a waste lithium battery recovery process.
The technical scheme of the invention is as follows:
a recovery process of waste lithium batteries comprises the following steps:
(1) carrying out insulation treatment on the waste lithium batteries and then transferring the waste lithium batteries to a feeding system;
(2) the material falls to a crushing system through a feeding system, the material is subjected to charged shear type crushing under the protection of nitrogen, and the fragments are conveyed to a high-temperature pyrolysis system through a screw;
(3) the crushed materials enter a high-temperature pyrolysis system, PVDF (polyvinylidene fluoride) glue and electrolyte on the waste lithium battery pole pieces are pyrolyzed in a high-temperature anaerobic state, and pyrolysis gas is butted with an organic gas collecting and processing system through an exhaust port to realize standard emission of flue gas;
(4) the materials from the pyrolysis system fall to a hydrodynamic sorting system, after meeting flowing liquid rushing from the bottom, the steel shell and the copper column head with higher specific gravity in the materials quickly fall down and are conveyed to a storage hopper or a rear-end device through a bottom spiral for further separation, and the copper-aluminum foil with low specific gravity is conveyed to a wet stripping system along with the flowing liquid;
(5) after the copper-aluminum foil sorted by the hydrodynamic sorting system is soaked and washed by dilute acid in a wet stripping system, the anode powder and the cathode powder adhered to the foil are stripped and fall off, so that the recovery rate of precious metals in the battery can be effectively improved;
(6) and drying the stripped copper-aluminum foil in a copper-aluminum separation system, shearing and granulating, and sending the copper-aluminum foil into a color separator or a specific gravity separator for copper-aluminum separation.
Further, the feeding system realizes vibration feeding, weighing and belt conveying.
Further, the crushing system comprises a feed valve, a shear crusher, a transfer screw and a nitrogen protection device.
Further, the pyrolysis temperature is 500-600 ℃, and the pyrolysis time is 1-3 hours.
Further, the hydrodynamic force sorting technology sends flowing liquid of copper-aluminum foil with light specific gravity in the materials to a wet stripping system at the rear end.
Further, the wet stripping system comprises a wet stripping circulating device, a wet stripping screen belt machine, a wet vibrating screen, a dilute acid configuration machine and a pump.
Further, the copper-aluminum sorting system comprises a dryer, a shearing granulator, a color sorter or a specific gravity sorter.
Further, the mother liquor obtained by hydrodynamic separation can be recycled to a wet stripping system, and can also be added into subsequent pole powder size mixing, if the size concentration is to be increased, pole powder made by a filter press or a belt filter or concentration equipment is added into size mixing to increase the size concentration, and the filtered mother liquor can be recycled as system liquid supplement.
Further, the hydrodynamic sorting system can be replaced by a shaker or a jump sorting device, etc.
Further, wet stripping can be replaced with a single device of soaking, scrubbing, sieving, and cleaning.
According to the invention, the waste lithium ion batteries are disassembled through shearing and crushing, then the waste lithium ion batteries enter a pyrolysis furnace for high-temperature pyrolysis, the PVDF glue and the electrolyte on the waste lithium battery pole pieces are pyrolyzed in a high-temperature anaerobic state, the pyrolyzed materials directly enter a hydrodynamic sorting system for sorting, so that the shell pile heads in the waste batteries are separated from copper-aluminum foil pole powder, and the copper-aluminum foil is further stripped from the pole powder attached to the surface through a wet stripping system. The battery powder from the pyrolysis system does not need to be subjected to processes such as dry screening or wind sorting, the battery powder directly enters the water power sorting to avoid dust raising of the electrode powder, and because lithium-containing compounds and graphite powder in the battery are electric conductors and combustible materials, if the powder dust raises and adheres to an electrical switch for a long time in the sorting process, electrical short circuit and ignition spontaneous combustion are easily caused, and potential safety hazards exist.
The invention has the beneficial effects that:
(1) the hydrodynamic sorting is adopted to replace dry screening or wind power winnowing, so that the phenomenon of dust raising of the electrode powder does not exist in the sorting process, and potential safety hazards such as electric short circuit, ignition and spontaneous combustion do not exist.
(2) The hydrodynamic separation and wet stripping technology both adopt liquid as carriers, and can be mutually independent and mutually connected and can also be combined for operation.
(3) And the hydrodynamic separation is adopted, so that no dust collecting and purifying equipment is required, and the operation cost and the investment cost of the system are reduced.
(4) And the hydrodynamic separation is adopted to replace dry screening and wind power winnowing, so that the noise can be reduced, the dust raising phenomenon is avoided, and the operation environment can be effectively improved.
(5) The mother liquor obtained by hydrodynamic separation can be recycled to a wet stripping system, and can also be added into subsequent pole powder size mixing, and the mother liquor obtained after filter pressing can be used as system fluid infusion without separate purification treatment; the wet stripping solution can be one or more of mother liquor separated by hydrodynamic force, prepared dilute acid solution and slag washing water of wet metallurgy, and can be recycled and supplemented at proper time.
(6) Diluted acid for wet stripping can also be used as mother liquor for hydrodynamic separation to participate in hydraulic separation, and dynamic diluted acid soaking can be carried out on copper-aluminum foil during the hydraulic separation of the positive and negative electrode powder copper-aluminum foil and the iron shell pile head, so that the aim of flushing and stripping the electrode powder on the surface of the copper-aluminum foil is achieved during the turbulent flow process
Drawings
FIG. 1 is a block diagram of the process flow of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited thereto.
Example 1
A recovery process of waste lithium batteries comprises the following steps:
(1) carrying out insulation treatment on the waste lithium batteries and then transferring the waste lithium batteries to a feeding system;
(2) the material falls to a crushing system through a feeding system, the material is subjected to charged shear type crushing under the protection of nitrogen, and the fragments are conveyed to a high-temperature pyrolysis system through a screw;
(3) the crushed materials enter a high-temperature pyrolysis system, PVDF (polyvinylidene fluoride) glue on the waste lithium battery pole pieces and electrolyte are pyrolyzed for 1.5 hours at 550 ℃ in a high-temperature anaerobic state, and pyrolysis gas is butted with an organic gas collecting and processing system through an exhaust port to realize standard emission of flue gas;
(4) the materials from the pyrolysis system fall to a hydrodynamic sorting system, after meeting flowing liquid rushing from the bottom, the steel shell and the copper column head with higher specific gravity in the materials quickly fall down and are conveyed to a storage hopper or a rear-end device through a bottom spiral for further separation, and the copper-aluminum foil with low specific gravity is conveyed to a wet stripping system along with the flowing liquid;
(5) after the copper-aluminum foil sorted by the hydrodynamic sorting system is soaked and washed by about 5 percent of dilute sulfuric acid in a wet stripping system, the anode powder and the cathode powder adhered to the foil are stripped and fall off;
(6) and drying the stripped copper-aluminum foil in a copper-aluminum separation system, shearing and granulating, and sending the copper-aluminum foil into a color separator or a specific gravity separator for copper-aluminum separation.
Technical index of recovery rate of each component material
| Principal product | Yield (%) | Recovery (%) |
| Powder of positive and negative electrode | 43.70 | ≥98 |
| Copper (Cu) | 11.40 | ≥98 |
| Aluminium | 3.80 | ≥98 |
| Pile head and iron shell | 15.2 | ≥98 |
Claims (10)
1. The recovery process of the waste lithium battery is characterized by comprising the following steps:
(1) carrying out insulation treatment on the waste lithium batteries and then transferring the waste lithium batteries to a feeding system;
(2) the material falls to a crushing system through a feeding system, the material is subjected to charged shear type crushing under the protection of nitrogen, and the fragments are conveyed to a high-temperature pyrolysis system through a screw;
(3) the crushed materials enter a high-temperature pyrolysis system, PVDF (polyvinylidene fluoride) glue and electrolyte on the waste lithium battery pole pieces are pyrolyzed in a high-temperature anaerobic state, and pyrolysis gas is butted with an organic gas collecting and processing system through an exhaust port to realize standard emission of flue gas;
(4) the materials from the pyrolysis system fall to a hydrodynamic sorting system, after meeting flowing liquid rushing from the bottom, the steel shell and the copper column head with higher specific gravity in the materials quickly fall down and are conveyed to a storage hopper or a rear-end device through a bottom spiral for further separation, and the copper-aluminum foil with low specific gravity is conveyed to a wet stripping system along with the flowing liquid;
(5) after the copper-aluminum foil sorted by the hydrodynamic sorting system is soaked and washed by dilute acid in a wet stripping system, the anode powder and the cathode powder adhered to the foil are stripped and fall off, so that the recovery rate of precious metals in the battery can be effectively improved;
(6) and drying the stripped copper-aluminum foil in a copper-aluminum separation system, shearing and granulating, and sending the copper-aluminum foil into a color separator or a specific gravity separator for copper-aluminum separation.
2. The recycling process of waste lithium batteries according to claim 1, characterized in that the feeding system realizes vibratory feeding, weighing and belt conveying.
3. The process for recycling spent lithium batteries according to claim 1, wherein the crushing system comprises a feed valve, a shear crusher, a transfer screw and a nitrogen protection device.
4. The recycling process of waste lithium batteries as claimed in claim 1, wherein the pyrolysis temperature is 500-600 ℃ and the pyrolysis time is 1-3 hours.
5. The recycling process of waste lithium batteries as claimed in claim 1, wherein the hydrodynamic separation technique is a wet stripping system which takes liquid as a carrier, the liquid is pumped to generate power, and the flowing liquid rising from the bottom is merged with the material falling from the top to convey the flowing liquid of copper-aluminum foil with light specific gravity to the rear end.
6. The recycling process of waste lithium batteries according to claim 1, wherein the wet stripping system comprises a wet stripping circulation device, a wet stripping mesh belt machine, a wet vibrating screen, a dilute acid configuration machine and a pump.
7. The recycling process of the waste lithium batteries according to claim 1, wherein the copper-aluminum sorting system comprises a dryer, a shearing granulator, a color sorter or a specific gravity sorter.
8. The recycling process of waste lithium batteries according to claim 1, wherein the mother liquor of the hydrodynamic sorting system can be reused in the wet stripping system, and can also be added into subsequent pole powder slurry preparation, and the mother liquor after pressure filtration can be used as a supplementary liquor of the hydrodynamic sorting system.
9. The process for recycling spent lithium batteries according to claim 1, wherein the hydrodynamic sorting system can replace a shaker or a jump sorting device.
10. The process for recycling spent lithium batteries according to claim 1, characterized in that wet stripping can replace single plants for soaking, scrubbing, screening and washing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111314639.3A CN113908977A (en) | 2021-11-08 | 2021-11-08 | Recovery process of waste lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111314639.3A CN113908977A (en) | 2021-11-08 | 2021-11-08 | Recovery process of waste lithium battery |
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| CN113908977A true CN113908977A (en) | 2022-01-11 |
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| CN202111314639.3A Withdrawn CN113908977A (en) | 2021-11-08 | 2021-11-08 | Recovery process of waste lithium battery |
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| Country | Link |
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Cited By (2)
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| CN114381603A (en) * | 2022-01-17 | 2022-04-22 | 湖南江冶机电科技股份有限公司 | A method for fully recovering valuable metal components of waste lithium batteries by hydrodynamic separation and wet stripping of polar powder |
| EP4575314A1 (en) * | 2023-12-18 | 2025-06-25 | Shenzhen Huineng Energy Storage Materials Engineering Research Center Co., Ltd | A method for recycling lithium batteries |
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Application publication date: 20220111 |