Method for preparing precursor and recycling lithium by using waste lithium ion battery ternary material

Abstract

The invention discloses a method for preparing a precursor and recycling lithium by using a waste lithium ion battery ternary material. The method comprises the following steps: recycling and crushing: carrying out primary crushing, sorting, pyrolysis, fine crushing and screening treatment on a waste lithium ion battery to obtain battery powder; the battery powder in the first step is subjected to pulpifying treatment, the pulpified battery powder is leached in an acid leaching tank, and leachate is subjected to solid-liquid separation to obtain filtrate; carrying out physical sedimentation and chemical adsorption on the filtrate, and then extracting to remove lithium in the solution; then introducing into a leachate storage tank for heating and temperature rise; a nickel-cobalt-manganese sulfate mixture with a certain proportion is obtained by utilizing a crystallization principle, and the quality requirement for producing the ternary precursor can be met, so that an extraction process is avoided, and a large amount of waste water and waste gas are prevented from being generated; the preparation before synthesis can be completed by adjusting a small amount of nickel sulfate, cobalt sulfate and manganese sulfate according to the component proportion requirement of the ternary precursor material, so that the production efficiency is improved while the process is simplified.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a method for preparing precursors and recovering lithium by using waste lithium-ion battery ternary materials. Background technique [0002] Lithium battery recycling production is to recycle waste lithium-ion batteries and other metals, and has the advantages of high recovery rate, low energy consumption, friendly to environmental pollution and high added value of products. Through the processing of waste lithium battery processing equipment and lithium battery recycling and processing equipment, it is processed into positive and negative active materials, copper-aluminum metal mixed particles, plastic separators, and precious metal black powder, using physical and chemical processing technology to achieve waste lithium batteries and scrap power. Lithium battery recycling purposes. In the long-term technical research of battery recycling equipment, lit...

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Problems solved by technology

[0003] In the existing process of preparing precursors and recovering lithium from waste lithium-ion battery ternary materials, the extraction process will use extraction agents, organic solvents, sodium hydroxide, and hydrochloric acid, which will generate a large amount of organic volatile substances and waste water, which will bring harm to the environment. Although the use of environmental protection facilities can play a certain role, it will bring a certain pressure on the production cost. The waste water has not been effectively treated and recycled, which is not conducive to environmental protection and long-term development. Therefore, we propose to use Method for preparing precursor and recovering lithium from ternary materials of waste lithium-ion batteries

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