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Method for recovering metal elements in waste lithium ion batteries

A lithium-ion battery and metal element technology, applied in battery recycling, recycling technology, waste collector recycling, etc., can solve the problems of serious secondary pollution, complicated process, low resource recovery rate, etc., and achieve low cost and high crystallinity high effect

Active Publication Date: 2014-11-26
贵州中伟资源循环产业发展有限公司
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Problems solved by technology

However, the current wet treatment has been widely promoted due to problems such as complex process, low resource recovery rate and serious secondary pollution.

Method used

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Examples

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Comparison scheme
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Embodiment Construction

[0016] All the features disclosed in this specification, or the steps in all the methods or processes disclosed, can be combined in any way except those which are mutually exclusive.

[0017] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0018] The present invention will be described in further detail below in conjunction with the implementation examples.

[0019] Implementation Example 1

[0020] Disperse 10g of mechanically crushed waste battery powder into 1L of 0.1mol / L sodium hydroxide solution, and after the soluble part of the battery powder is completely dissolved, separate the plastic powder and carbon powder on the upper layer of the solution by means of cyclone separation The copper powder and the electrode powder are separ...

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Abstract

The invention discloses a method for recovering metal elements in waste lithium ion batteries, which comprises the following steps: (1) dispersing mechanically-pulverized waste battery powder in a sodium hydroxide solution for dissolution, and carrying out swirl separation to obtain plastic powder and carbon powder from the upper layer of the solution and obtain copper powder and electrode powder from the lower part; (2) obtaining an aluminum hydroxide precipitate; (3) obtaining copper sulfate solid powder; (4) obtaining a lithium carbonate precipitate; (5) and obtaining cobalt oxalate. The method comprehensively separates the metal elements cobalt, copper, aluminum and lithium in the battery powder; the aluminum hydroxide, copper sulfate, cobalt oxalate and lithium carbonate prepared by the method have the advantages of high uniformity and high crystallinity; and the method implements recovery and reutilization of the battery materials, and is low in cost and suitable for industrialized large-scale production.

Description

technical field [0001] The invention relates to a method for recovering metal elements in waste lithium ion batteries, which is used for extracting four metal elements of cobalt, copper, aluminum and lithium in waste lithium ion batteries. Background technique [0002] With the widespread application of lithium-ion batteries in various portable electronic devices, power tools and electric vehicles, the waste lithium-ion batteries produced in the world every year are calculated in billions of pieces. Lithium-ion batteries are generally composed of positive electrode materials, negative electrode materials, and current collectors. They contain expensive metal elements such as cobalt, lithium, copper, and aluminum. These metal elements account for 70-80% of the total cost of the battery. The annual consumption of billions of lithium-ion batteries consumes a considerable amount of non-renewable metal resources. At the same time, heavy metal elements such as cobalt are highly tox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B21/00C22B26/12C22B23/00H01M10/54
CPCY02P10/20Y02W30/84
Inventor 舒杰刘望才施江焕陈效宁张皓荐
Owner 贵州中伟资源循环产业发展有限公司
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