A kind of cascade leaching method of lithium-containing multi-element waste

A leaching and waste technology, which is applied in the field of leaching lithium-containing multi-component waste by using lattice defects, can solve problems such as large differences in valence and activity, single crystal structure, lattice defects, etc., to avoid technical problems, high purity, low cost effect
CN106947868BActive Publication Date: 2018-04-06CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2018-04-06

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Abstract

The invention discloses a step leaching method for multi-element waste containing lithium. The method is different from the traditional recovering route that one-time leaching and multi-process separation are conducted. According to the step leaching method for the multi-element waste containing the lithium, aiming at the characteristics that the multi-element waste containing the lithium is single and relatively intact in crystal structure, and the valence states and activity differences of all constituent elements are large, acid of different characteristics and different characteristics is adopted to sequentially leach the lithium element, the nickel and / or cobalt and the manganese element in a directional mode, and the specific elements are dissolved to cause lattice imperfection, so that the microcrystalline structure of a raw material is transitioned from a stable state to a meta-stable state, even an instable state, and leaching and separating of the subsequent elements is promoted accordingly. The leaching method for the multi-element waste containing the lithium is easy to operate, mild in condition and low in cost, sufficient recovering of the multiple constituent elements in the waste can be achieved, and industrialization is easy to achieve.
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Description

technical field

[0001] The invention relates to the field of hydrometallurgy, in particular to a method for cascaded leaching of lithium-containing multi-element waste by utilizing lattice defects. Background technique

[0002] In recent years, in order to reduce the excessive dependence on traditional petrochemical energy and improve the urban air pollution caused by automobile exhaust, governments of various countries have vigorously developed new energy industries and actively promoted new energy vehicles. In 2016, my country's annual output of new energy vehicles exceeded 450,000 for the first time, replacing the United States as the world's largest producer and seller of new energy vehicles. The core components of new energy vehicles are power batteries, among which lithium-ion batteries are currently one of the most promising power batteries in the market. However, power lithium-ion batteries are consumables (with an average lifespan of 3-5 years), and contain a large...

Claims

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