WO2024254856A1 - Procédé de traitement de récupération basé sur une poudre de batterie extraite au lithium - Google Patents

Procédé de traitement de récupération basé sur une poudre de batterie extraite au lithium Download PDF

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Publication number
WO2024254856A1
WO2024254856A1 PCT/CN2023/100733 CN2023100733W WO2024254856A1 WO 2024254856 A1 WO2024254856 A1 WO 2024254856A1 CN 2023100733 W CN2023100733 W CN 2023100733W WO 2024254856 A1 WO2024254856 A1 WO 2024254856A1
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Prior art keywords
leaching
residue
acid
reducing agent
lithium battery
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PCT/CN2023/100733
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English (en)
Chinese (zh)
Inventor
付堂新
邓开伟
安辉
陈若葵
阮丁山
李长东
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Hunan Brunp Recycling Technology Co Ltd
Guangdong Brunp Recycling Technology Co Ltd
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Hunan Brunp Recycling Technology Co Ltd
Guangdong Brunp Recycling Technology Co Ltd
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Application filed by Hunan Brunp Recycling Technology Co Ltd, Guangdong Brunp Recycling Technology Co Ltd filed Critical Hunan Brunp Recycling Technology Co Ltd
Priority to CN202380009535.2A priority Critical patent/CN117044009B/zh
Priority to PCT/CN2023/100733 priority patent/WO2024254856A1/fr
Publication of WO2024254856A1 publication Critical patent/WO2024254856A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • 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

Definitions

  • the process of producing battery-grade nickel, cobalt and manganese from lithium battery powder generally uses a wet method.
  • the wet method generally uses a leaching-impurity removal-extraction-lithium extraction process to treat battery powder.
  • Most battery powder impurities are removed by adjusting the pH of the solution using soda ash/calcium carbonate to remove iron and aluminum from the solution.
  • the amount of residual acid introduced into the solution during the impurity removal process increases, which increases the consumption of auxiliary materials.
  • a recycling method based on lithium battery powder extraction comprises the following steps:
  • the battery powder after lithium extraction is subjected to slurrying operation to obtain slurry;
  • a first leaching and filtering operation is performed to obtain a first leaching solution and a first leaching residue
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution;
  • the sulfuric acid, the reducing agent and the first leaching residue are mixed and then subjected to a second leaching and filtering operation to obtain a second leaching solution and a second leaching residue;
  • the pH value in the first stage of leaching and filtration operation is 4-6;
  • the pH value in the second stage leaching and filtration operation is 1-2.
  • FIG1 is a schematic flow diagram of a recycling method for lithium battery powder in one embodiment
  • FIG. 2 is a process flow chart of a recycling method based on lithium battery powder extraction.
  • a recycling method for lithium battery powder includes some or all of the following steps:
  • the lithium extraction slag after lithium extraction is the lithium extraction battery powder, and the battery powder is subjected to a slurrying operation to obtain a slurry to facilitate subsequent recycling and processing work.
  • the battery powder after lithium extraction mainly contains metal elements of iron, aluminum, copper, nickel, cobalt and manganese.
  • the first stage of leaching and filtering is performed in a leaching tank after mixing sulfuric acid, a reducing agent and a slurry.
  • the pH value of the first stage of leaching and filtering is controlled at 4 to 6.
  • the metal elements of iron, aluminum and copper are easy to form precipitation under the action of the reducing agent and the pH value of 4 to 6. In this way, nickel, cobalt and manganese can be separated from iron, aluminum and copper, so as to recover the metal elements of nickel, cobalt and manganese.
  • the battery powder after lithium extraction is doped with calcium, and the calcium is added to the first leachate after the first leaching and filtering operation.
  • the calcium ions in the first leachate are extracted by adding the P204 extractant, so as to remove impurities from the first leachate to obtain a battery-grade nickel-cobalt-manganese solution, and therefore, there is no need to perform a full extraction process on the leachate, thereby effectively reducing the consumption of auxiliary materials, and at the same time, the preparation method of the battery-grade nickel-cobalt-manganese solution can be greatly simplified, thereby simplifying the recovery and processing steps of the lithium-extracted battery powder.
  • nickel + cobalt + manganese is 100g/L ⁇ 120g/L, which is a battery-grade nickel-cobalt-manganese solution.
  • sulfuric acid, a reducing agent and a first leaching residue are mixed and then a second leaching and filtering operation is performed in a second leaching tank, and the pH value of the second leaching and filtering operation is controlled at 1 to 2.
  • a second leaching residue is formed at a pH value of 1 to 2 and under the action of the reducing agent, and the iron, aluminum and copper elements in the first leaching residue are leached to form a second leachate, so that the iron, aluminum and copper elements can be recovered.
  • the second leachate is subjected to impurity removal and filtration operations, and the filtered residue is iron-aluminum-copper residue, thereby realizing the recovery of iron, aluminum and copper elements.
  • the second leaching residue is rich in graphite
  • battery-grade graphite raw materials can be obtained by performing high-acid leaching and filtration operations on the second leaching residue, thereby realizing the recycling and reuse of graphite, and saving the cost of disposing the second leaching residue as solid waste or hazardous waste.
  • battery-grade graphite raw materials only need to be graphitized once to obtain battery-grade graphite, and battery-grade graphite raw materials can only be obtained when the content of nickel, cobalt and manganese in the leached slag is less than 0.08%, and there is no need for secondary impurity removal.
  • high acid here refers to acid with an acidity of more than 100 g/L, while the acidity of the first-stage filtration operation and the second-stage filtration operation are both below 100 g/L.
  • the pH value in the first stage of leaching and filtration operation is 4-6; the pH value in the second stage of leaching and filtration operation is 1-2.
  • Battery-grade nickel-cobalt-manganese solution does not need to be subjected to a full extraction process to complete the preparation of the battery-grade nickel-cobalt-manganese solution, which can effectively reduce the consumption of auxiliary materials, and can also greatly simplify the preparation method of the battery-grade nickel-cobalt-manganese solution, thereby simplifying the recovery and processing steps of lithium battery powder, thereby effectively improving the recovery and processing efficiency of lithium battery powder and reducing the recovery and processing cost of lithium battery powder.
  • sulfuric acid, a reducing agent and the first leaching residue are mixed and then subjected to a second leaching and filtering operation, while the pH value is strictly controlled between 1 and 2 and a second leaching residue is formed under the action of the reducing agent, and at the same time, the iron, aluminum and copper elements in the first leaching residue are leached and a second leaching liquid is formed, and the second leaching residue and the second leaching liquid are separated by filtration. Then, the second leaching liquid is subjected to an impurity removal and filtration operation to obtain a filter residue, and the filter residue is a mixed precipitate of iron, aluminum and copper, thereby achieving a better impurity removal and recovery effect.
  • the second leaching residue is rich in graphite
  • a battery-grade graphite raw material can be obtained by performing a high-acid leaching and filtration operation on the second leaching residue, thereby realizing the recycling and reuse of graphite, and at the same time, the cost of disposing the second leaching residue as solid waste or hazardous waste can be saved.
  • the specific operation steps of slurrying the lithium-extracted battery powder to obtain the slurry are: adding pure water to the lithium-extracted battery powder to perform slurrying operation to obtain the slurry with a solid content of 20% to 30%. It should be noted that the battery powder after lithium extraction is slurried with pure water to obtain a slurry with a solid content of 20% to 30%.
  • the recovery method further includes the following steps: dissolving the first leaching residue. It should be noted that the first leaching residue obtained by filtration needs to be formed into a liquid form first, and the first leaching residue is dissolved by adding pure water to facilitate the subsequent second leaching filtration operation.
  • the recovery method further includes the following steps:
  • the reducing agent and the first leaching residue are mixed and then subjected to a second leaching and filtering operation;
  • the sulfuric acid, the reducing agent, the first leaching residue and the slurry are mixed and then a first stage leaching and filtering operation is performed.
  • the impurity content in the first leaching residue can be obtained.
  • the mass percentage of the impurity content is less than 5%
  • the first leaching residue is returned to a leaching tank and the first leaching and filtration operation is circulated, which can effectively increase the impurity content in the second leachate, facilitate impurity removal, and reduce the waste of auxiliary materials for multiple impurity removals, thereby effectively reducing the use of impurity removal auxiliary materials, and further effectively reducing the recovery and processing costs of lithium battery powder.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution in the following specific steps:
  • the specific operation steps of performing impurity removal and filtration operation on the second leachate are:
  • an alkaline salt is added to the second leaching solution to perform filtering operation to obtain filter residue and filtrate.
  • the copper ions in the second leachate can be replaced.
  • the pH value of the second leachate is between 3 and 4, at which time both iron and aluminum can form corresponding metal salt precipitations, and then filtering operation is performed to obtain filter residues and filter liquid, wherein the filter residues are iron-aluminum-copper slag, so that the iron, aluminum and copper metal elements can be effectively recovered.
  • the active metal is one of iron powder, manganese powder or nickel powder. It should be noted that according to the metal activity sequence table, the copper ions in the second leaching solution can be replaced by selecting an active metal with an activity greater than that of copper.
  • the alkaline salt is industrial grade sodium carbonate or industrial grade sodium hydroxide. It should be noted that the use of high-purity raw materials such as industrial-grade sodium carbonate and industrial-grade sodium hydroxide as alkaline salts can effectively reduce the incorporation of impurities, thereby reducing the use of impurity removal auxiliary materials, and further effectively reducing the recycling and processing costs of lithium battery powder.
  • the specific operation steps of performing high acid leaching and filtering operation on the second leached residue to obtain battery-grade graphite raw material are:
  • the sulfuric acid, the reducing agent and the second leaching residue are mixed and then subjected to a first high-acid leaching filtration operation to obtain a first high-acid leaching residue and a first high-acid leaching solution;
  • the sulfuric acid, the reducing agent and the first high-acid leaching residue are mixed and then subjected to a second high-acid leaching filtration operation to obtain the battery-grade graphite raw material.
  • the metal content in the second leaching residue after the first leaching and filtering operation and the second leaching and filtering operation is relatively low.
  • the metal in the second leaching residue is first leached by a high acid leaching method with an acidity greater than 100 g/L through the first high acid leaching and filtering operation, that is, by increasing the acidity of sulfuric acid and increasing the number of back and forth collisions between sulfuric acid and the metal to be leached in the second leaching residue, the metal to be leached in the second leaching residue can be dissolved in sulfuric acid, so that the metal content in the first high acid leaching residue can be effectively reduced.
  • the metal content in the first high-acid leaching slag after the first high-acid leaching filtration operation is less than the metal content in the second leaching slag.
  • the acidity of the second high-acid leaching filtration operation is greater than the acidity of the first high-acid leaching filtration operation, that is, further increasing the acidity of sulfuric acid, thereby further increasing the number of back-and-forth collisions between sulfuric acid and the metal to be leached in the first high-acid leaching slag
  • the metal to be leached in the first high-acid leaching slag can be dissolved in sulfuric acid, so that the second high-acid leaching slag can meet the standard of battery-grade graphite raw materials.
  • the recovery and treatment method further includes the following steps: the sulfuric acid, the reducing agent, the first high-acid leaching liquid and the first leaching residue are mixed and then subjected to a second-stage leaching filtration operation.
  • the sulfuric acid, the reducing agent and the first high acid leaching slag are After the step of performing a second high-acid leaching and filtering operation after mixing to obtain the battery-grade graphite raw material, the recycling method further includes the following steps: mixing the sulfuric acid, the reducing agent, the second high-acid leaching solution and the second leaching residue and performing a first high-acid leaching and filtering operation.
  • the acidity of the first high-acid leaching and filtering operation is 200 g/L to 300 g/L. It is understandable that, at an acidity of 200 g/L to 300 g/L, the number of back-and-forth collisions between sulfuric acid and the metal to be leached in the second leaching residue can be increased, so that the metal to be leached can be dissolved in sulfuric acid, that is, the metal in the second leaching residue is leached into the first high-acid leaching solution.
  • the acidity of the second high-acid leaching and filtering operation is 300 g/L to 500 g/L. It is understandable that at an acidity of 300 g/L to 500 g/L, the number of back-and-forth collisions between sulfuric acid and the metal to be leached in the first high-acid leaching slag can be further increased, and the metal to be leached can be further dissolved in sulfuric acid, so that the second high-acid leaching slag can meet the standards of battery-grade graphite raw materials, which can not only save the cost of disposing the leaching slag as hazardous waste or solid waste, but also realize the recycling of graphite.
  • the temperature of the first high acid leaching filtration operation and the second high acid leaching filtration operation are both 80° C. to 100° C. It can be understood that at a temperature of 80° C. to 100° C., the first high acid leaching filtration operation and the second high acid leaching filtration operation can both leach the metal in the leached residue to the greatest extent, thereby achieving a better impurity removal effect.
  • the temperature of the first leaching and filtering operation is 80°C to 100°C. It should be noted that when the temperature is 80°C to 100°C and the pH value is strictly controlled between 4 and 6, the impurity content of iron, aluminum, copper and the like in the first leachate is less than 2ppm, that is, when the impurity content is less than 2ppm, the first leachate can meet the requirements of P204 extraction without further impurity removal, and the first leachate is subjected to extraction and impurity removal operation by the P204 extractant, so that a battery-grade nickel-cobalt-manganese solution can be obtained.
  • a battery-grade nickel-cobalt-manganese solution can be prepared without a full extraction process, which can greatly simplify the preparation process of a battery-grade nickel-cobalt-manganese solution, thereby simplifying the recovery and processing steps of lithium battery powder, and further improving the recovery and processing efficiency of lithium battery powder.
  • the reducing agent is at least one of hydrogen peroxide, sulfur dioxide and sodium sulfite. It should be noted that by adding a reducing agent, the metal elements such as iron, aluminum, copper, nickel, cobalt, and manganese in the lithium battery powder are reduced to corresponding metal ions, so as to facilitate the impurity removal and recycling process.
  • Pure water is added to the lithium battery powder to obtain a slurry with a solid content of 20%.
  • Sulfuric acid, a reducing agent and a slurry are mixed and the pH value is adjusted to 4.3, and then the first stage of leaching and filtering operation is performed to obtain a first leachate and a first leach residue.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution.
  • Sulfuric acid, a reducing agent and the first leach residue are mixed and the pH is adjusted to 1.5, and then the second stage of leaching and filtering operation is performed to obtain a second leachate and a second leach residue.
  • the second leachate is subjected to an impurity removal and filtering operation to obtain a filtrate and a filter residue.
  • the second leaching residue is subjected to a high acid leaching and filtering operation to obtain a battery-grade graphite raw material.
  • the first leaching solution is shown in Table 1:
  • the first leaching solution after P204 extraction and impurity removal is shown in Table 2:
  • Pure water is added to the lithium battery powder to obtain a slurry with a solid content of 20%.
  • Sulfuric acid, a reducing agent and a slurry are mixed and the pH value is adjusted to 4.8, and then the first stage of leaching and filtering operation is performed to obtain a first leachate and a first leach residue.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution.
  • Sulfuric acid, a reducing agent and the first leach residue are mixed and the pH is adjusted to 1.5, and then the second stage of leaching and filtering operation is performed to obtain a second leachate and a second leach residue.
  • the second leachate is subjected to an impurity removal and filtering operation to obtain a filtrate and a filter residue.
  • the second leaching residue is subjected to a high acid leaching and filtering operation to obtain a battery-grade graphite raw material.
  • Pure water is added to the lithium battery powder to obtain a slurry with a solid content of 20%.
  • the sulfuric acid, reducing agent and slurry are mixed and the pH value is adjusted to 5.7, the first stage of leaching and filtering operation is performed to obtain the first leachate and the first leach residue.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution.
  • the second stage of leaching and filtering operation is performed to obtain the second leachate and the second leach residue.
  • the second leachate is subjected to an impurity removal and filtering operation to obtain a filtrate and a filter residue.
  • the second leaching residue is subjected to a high acid leaching and filtering operation to obtain a battery-grade graphite raw material.
  • Pure water is added to the lithium battery powder to obtain a slurry with a solid content of 20%.
  • the sulfuric acid, reducing agent and slurry are mixed and the pH value is adjusted to 6.0, the first stage of leaching and filtering operation is performed to obtain the first leachate and the first leach residue.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution.
  • the sulfuric acid, reducing agent and first leach residue are mixed and the pH is adjusted to 1.5
  • the second stage of leaching and filtering operation is performed to obtain the second leachate and the second leach residue.
  • the second leachate is subjected to an impurity removal and filtering operation to obtain a filtrate and a filter residue.
  • the second leaching residue is subjected to a high acid leaching and filtering operation to obtain a battery-grade graphite raw material.
  • Pure water is added to the lithium battery powder to obtain a slurry with a solid content of 20%.
  • the sulfuric acid, reducing agent and slurry are mixed and the pH value is adjusted to 4.0, the first stage of leaching and filtering operation is performed to obtain the first leachate and the first leach residue.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution.
  • the second stage of leaching and filtering operation is performed to obtain the second leachate and the second leach residue.
  • the second leachate is subjected to an impurity removal and filtering operation to obtain a filtrate and a filter residue.
  • the second leaching residue is subjected to a high acid leaching and filtering operation to obtain a battery-grade graphite raw material.
  • Pure water is added to the lithium battery powder to obtain a slurry with a solid content of 20%.
  • the sulfuric acid, reducing agent and slurry are mixed and the pH value is adjusted to 2.0, the first stage of leaching and filtering operation is performed to obtain the first leachate and the first leach residue.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution.
  • the sulfuric acid, reducing agent and the first leach residue are mixed and the pH is adjusted to 1.5, the second stage of leaching and filtering operation is performed to obtain the second leachate and the second leach residue.
  • the second leachate is subjected to an impurity removal and filtering operation to obtain a filtrate and a filter residue.
  • the second leaching residue is subjected to a high acid leaching and filtering operation to obtain a battery-grade graphite raw material.
  • Pure water is added to the lithium battery powder to obtain a slurry with a solid content of 20%.
  • the sulfuric acid, reducing agent and slurry are mixed and the pH value is adjusted to 2.5, the first stage of leaching and filtering operation is performed to obtain the first leachate and the first leach residue.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution.
  • the sulfuric acid, reducing agent and the first leach residue are mixed and the pH is adjusted to 1.5, the second stage of leaching and filtering operation is performed to obtain the second leachate and the second leach residue.
  • the second leachate is subjected to an impurity removal and filtering operation to obtain a filtrate and a filter residue.
  • the second leaching residue is subjected to a high acid leaching and filtering operation to obtain a battery-grade graphite raw material.
  • Pure water is added to the lithium battery powder to obtain a slurry with a solid content of 20%.
  • the sulfuric acid, reducing agent and slurry are mixed and the pH value is adjusted to 3.0, the first stage of leaching and filtering operation is performed to obtain the first leachate and the first leach residue.
  • the first leachate is subjected to a P204 extraction and impurity removal operation to obtain a battery-grade nickel-cobalt-manganese solution.
  • the second stage of leaching and filtering operation is performed to obtain the second leachate and the second leach residue.
  • the second leachate is subjected to an impurity removal and filtering operation to obtain a filtrate and a filter residue.
  • the second leaching residue is subjected to a high acid leaching and filtering operation to obtain a battery-grade graphite raw material.
  • the recycling and processing method of battery powder based on lithium extraction of the present application is to mix sulfuric acid, a reducing agent and a slurry and then perform the first stage of leaching and filtering operation.
  • the pH value is strictly controlled between 4-6 and under the action of the reducing agent, the iron, aluminum and copper elements in the battery powder after lithium extraction form a precipitate, namely the first leaching residue.
  • the first leaching residue and the first leachate are separated by filtration, and then the first leachate is subjected to a P204 extraction and impurity removal operation, that is, the calcium ions in the first leachate are extracted and impurities are removed by the P204 extractant, so that a battery-grade nickel-cobalt-manganese solution can be prepared. Therefore, there is no need to carry out a full extraction process to complete the preparation of a battery-grade nickel-cobalt-manganese solution, which can effectively reduce the consumption of auxiliary materials and also greatly simplify the battery-grade process.
  • the method for preparing the nickel-cobalt-manganese solution can simplify the recovery and processing steps of lithium battery powder, thereby effectively improving the recovery and processing efficiency of lithium battery powder and reducing the recovery and processing cost of lithium battery powder.
  • the recycling method based on lithium battery powder extraction of the present application is to mix sulfuric acid, a reducing agent and a first leaching residue and then perform a second leaching and filtering operation.
  • the pH value is strictly controlled between 1-2 and a second leaching residue is formed under the action of a reducing agent.
  • the iron, aluminum and copper elements in the first leaching residue are leached and a second leaching liquid is formed.
  • the second leaching residue and the second leaching liquid are separated by filtration.
  • the filter residue is obtained by performing an impurity removal and filtration operation on the second leaching liquid, and the filter residue is a mixed precipitate of iron, aluminum and copper, thereby achieving a better impurity removal and recovery effect.
  • the second leaching residue is rich in graphite
  • a battery-grade graphite raw material can be obtained, and the graphite can be recycled and reused, and the cost of disposing the second leaching residue as solid waste or hazardous waste can be saved.

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Abstract

L'invention concerne un procédé de traitement de récupération basé sur une poudre de batterie extraite au lithium, lequel procédé comprend les étapes suivantes consistant à : soumettre la poudre de batterie, qui a été soumise à une extraction au lithium, à une opération de réduction en pâte de façon à obtenir une suspension ; mélanger de l'acide sulfurique, un agent réducteur et la suspension et, ensuite, soumettre le mélange à une opération de lixiviation et de filtrage de première section de façon à obtenir un premier lixiviat et un premier résidu de lixiviation ; soumettre le premier lixiviat à une extraction de P204 et à une opération d'élimination d'impuretés de façon à obtenir une solution de nickel-cobalt-manganèse de qualité de batterie ; mélanger de l'acide sulfurique, l'agent réducteur et le premier résidu de lixiviation et, ensuite, soumettre le mélange à une opération de lixiviation et de filtrage de seconde section de façon à obtenir un second lixiviat et un second résidu de lixiviation ; soumettre le second lixiviat à une opération d'élimination et de filtration d'impuretés de façon à obtenir un filtrat et un résidu de filtration ; et soumettre le second résidu de lixiviation à une opération de lixiviation et de filtration à haute teneur en acide de façon à obtenir une matière première de graphite de qualité de batterie, la valeur de pH dans l'opération de lixiviation et de filtration de première section étant 4 à 6 et la valeur de pH dans l'opération de lixiviation et de filtration de seconde section étant 1 à 2.
PCT/CN2023/100733 2023-06-16 2023-06-16 Procédé de traitement de récupération basé sur une poudre de batterie extraite au lithium Pending WO2024254856A1 (fr)

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CN202380009535.2A CN117044009B (zh) 2023-06-16 2023-06-16 基于提锂电池粉的回收处理方法
PCT/CN2023/100733 WO2024254856A1 (fr) 2023-06-16 2023-06-16 Procédé de traitement de récupération basé sur une poudre de batterie extraite au lithium

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CN120149611B (zh) * 2025-03-20 2025-09-30 科立鑫(珠海)新能源有限公司 一种基于提锂电池粉的回收装置及其回收方法
CN120810177B (zh) * 2025-09-15 2025-11-25 赣州诺威新能源有限公司 一种复合型锂离子电池隔膜及其制备方法、应用

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