Method for recovering valuable metal in positive plate of lithium battery

A recovery method and technology for valuable metals, applied in the field of recovery of valuable metals in positive plates of lithium batteries, can solve the problems of complex process, long process, difficult treatment of organic waste water, etc.

Pending Publication Date: 2022-03-25
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing wet recycling process of waste lithium batteries has the problems of complex process and long process. At the same time

Method used

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  • Method for recovering valuable metal in positive plate of lithium battery
  • Method for recovering valuable metal in positive plate of lithium battery
  • Method for recovering valuable metal in positive plate of lithium battery

Examples

Experimental program
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Example Embodiment

[0118] Example 1

[0119] The present embodiment provides a method for recovering valuable metals in the positive electrode sheet of a lithium battery, and the specific process is as follows:

[0120]A1. Pretreatment: The waste lithium battery ternary cathode sheet (from Guangdong Bangpu Cycle Co., Ltd., in mass percentage, which contains Ni47.3%, Co6.2%, Mn5.9%, Li7.2%) in turn Carry out crushing, sorting and screening processes to obtain pole piece powder.

[0121] A2. Deep reduction of aluminum powder:

[0122] A21. Mix the pole piece powder obtained in step A1 and the aluminum powder uniformly according to the mass ratio of 1:0.5,

[0123] A22. Place the powder obtained in step A21 in a tube furnace, in a nitrogen atmosphere, at a heating rate of 1°C / min, from 25°C to 400°C, then roast for 4h, and cool;

[0124] A3. Magnetic separation: the pole piece powder obtained in step A2 is subjected to magnetic separation with a magnetic separator under the condition that the ma...

Example Embodiment

[0152] Example 2

[0153] The present embodiment provides a method for recovering valuable metals in the positive electrode sheet of a lithium battery, and the specific process is as follows:

[0154] A1. Pretreatment: The waste lithium battery ternary cathode sheet (provided by Guangdong Bangpu Cycle Co., Ltd., in terms of mass percentage, which contains Ni36.5%, Co11.3%, Mn12.4%, Li7.1%) The processes of crushing, sorting and screening are carried out in sequence to obtain the pole piece powder.

[0155] A2. Deep reduction of aluminum powder:

[0156] A21. Mix the pole piece powder obtained in step A1 and the aluminum powder uniformly according to the mass ratio of 1:1.2,

[0157] A22. Place the powder obtained in step A21 in a tube furnace, in a nitrogen atmosphere, at a heating rate of 5°C / min, from 25°C to 600°C, then roast for 2 hours, and cool;

[0158] A3. Magnetic separation: The pole piece powder obtained in step A2 is subjected to magnetic separation with a magne...

Example Embodiment

[0184] Example 3

[0185] The present embodiment provides a method for recovering valuable metals in the positive electrode sheet of a lithium battery, and the specific process is as follows:

[0186] A1. Pretreatment: The waste lithium battery ternary cathode sheet (from Guangdong Bangpu Cycle Co., Ltd., in mass percentage, which contains Ni31.7%, Co11.4%, Mn16.5%, Li7.1%) in turn Carry out crushing, sorting and screening processes to obtain pole piece powder.

[0187] A2. Deep reduction of aluminum powder:

[0188] A21. The pole piece powder obtained in step A1 and the aluminum powder are uniformly mixed according to the mass ratio of 1:1,

[0189] A22. Place the powder obtained in step A21 in a tube furnace, in a nitrogen atmosphere, at a heating rate of 2°C / min, from 25°C to 500°C, then roast for 3h, and cool;

[0190] A3. Magnetic separation: the pole piece powder obtained in step A2 is subjected to magnetic separation with a magnetic separator under the condition that...

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Abstract

The invention discloses a method for recycling valuable metal in a lithium battery positive plate. The method comprises the following steps: S1, mixing a positive plate material with reducing metal, and roasting; the roasting is carried out under a protective atmosphere; s2, performing magnetic separation on the material obtained in the step S1 to obtain a magnetic component and a non-magnetic component; s3, performing acid dissolution on the magnetic component, concentrating the obtained leachate, and performing cooling crystallization to obtain metal salt A; s4, the non-magnetic component is soaked in water, and sediment and water soaking liquid are obtained; adding carbonate into the water immersion liquid to obtain lithium carbonate; and dissolving the sediment with acid, purifying, and evaporating and crystallizing the obtained dissolved solution to obtain the metal salt B. The recovery method provided by the invention can achieve the purpose of omitting extraction and subsidiary steps thereof through simple impurity removal and separation procedures, simplifies the process flow, and saves the investment cost.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, and in particular relates to a method for recovering valuable metals in lithium battery positive plates. Background technique [0002] Due to the advantages of light weight and high energy density, lithium batteries have been widely used in digital electronic products, new energy vehicles and energy storage fields. In recent years, the vigorous development of the new energy industry has promoted the demand for lithium batteries in the consumer market. According to statistics, in 2020, the annual output of pure electric vehicles in the mainland will exceed 2 million, and the cumulative production and sales will reach 5 million. However, since the service life of lithium batteries is 5 to 8 years, while the new energy industry is booming, the waste batteries produced by scrapped products have also reached 500,000 tons per year. [0003] Waste lithium-ion batteries contain metal reso...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02C22B23/00C22B26/12C22B47/00C30B7/14C30B28/04C30B29/46C25C3/06C01D15/08H01M10/54
CPCC22B7/006C22B1/02C22B23/04C22B26/12C22B47/00C30B7/14C30B28/04C30B29/46C01D15/08C25C3/06H01M10/54Y02P10/20Y02W30/84
Inventor 欧阳石保李长东陈若葵付雄聪阮丁山蔡勇
Owner GUANGDONG BRUNP RECYCLING TECH
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