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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, the extraction process also leads to problems such as large equipment footprint, high investment cost, and difficult organic wastewater treatment.

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
Comparison scheme
Effect test

Embodiment 1

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

[0120]A1. Pretreatment: The waste lithium battery ternary positive electrode sheet (from Guangdong Bangpu Recycling Co., Ltd., by mass percentage, containing Ni47.3%, Co6.2%, Mn5.9%, Li7.2%) in turn The crushing, sorting and sieving processes are carried out to obtain pole piece powder.

[0121] A2. Deep reduction of aluminum powder:

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

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

[0124] A3. Magnetic separation: the pole piece powder obtained in step A2 is separated by magnetic separation under the condition that the magnetic field strength is 10T wit...

Embodiment 2

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

[0154] A1. Pretreatment: the waste lithium battery ternary positive electrode sheet (provided by Guangdong Bangpu Recycling Co., Ltd., by mass percentage, containing Ni36.5%, Co11.3%, Mn12.4%, Li7.1%) The steps of crushing, sorting and sieving are carried out in sequence to obtain pole piece powder.

[0155] A2. Deep reduction of aluminum powder:

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

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

[0158] A3. Magnetic separation: the pole piece powder obtained in step A2 is separated by magnetic separation under the condition that the magnetic field streng...

Embodiment 3

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

[0186] A1. Pretreatment: The waste lithium battery ternary positive electrode sheet (from Guangdong Bangpu Recycling Co., Ltd., by mass percentage, containing Ni31.7%, Co11.4%, Mn16.5%, Li7.1%) in turn The crushing, sorting and sieving processes are carried out to obtain pole piece powder.

[0187] A2. Deep reduction of aluminum powder:

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

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

[0190] A3. Magnetic separation: the pole piece powder obtained in step A2 is separated by magnetic separation under the condition that the magnetic field strength is 20T wi...

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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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