Method for recovering valuable metals from cathode materials of waste lithium ion batteries

Abstract

The invention discloses a method for recovering valuable metals from cathode materials of waste lithium ion batteries. The method comprises the following steps: the waste lithium ion batteries are discharged and dismantled, and cathode plates are separated out; the cathode plates are subjected to pyrolysis for glue removal, and current collectors and active materials are separated out; the active materials are mixed with chloride for chloridizing roasting; a solid product of chloridizing roasting is leached with water, and aleachate containing valuable metal ions is obtained. The method overcomes the defect that a large quantity of mineral acids and bases is needed to be consumed in the traditional metal leaching and recovering process of the cathode materials of the waste lithium ion batteries, adopts simple process, is low in cost and environment-friendly and has great industrial application value.

Description

technical field

[0001] The invention relates to a method for recycling waste batteries, in particular to a method for efficiently recovering valuable metals from waste lithium ion battery positive electrode materials through a chlorination roasting method, and belongs to the field of renewable resources. Background technique

[0002] With the rapid development of lithium-ion batteries, lithium-ion batteries have occupied the portable consumer electronics market, and continue to expand their market territory to new energy electric vehicles and smart grids. In 2015, the total output of lithium-ion batteries in China was 47.13Gwh, of which, the output of consumer lithium-ion batteries was 23.69Gwh, accounting for 50.26%; the output of power batteries was 16.9Gwh, accounting for 36.07%; the output of energy storage lithium-ion batteries was 1.73Gwh, accounting for 3.67% . As the market expands, the demand for lithium-ion batteries continues to increase, which brings about a ser...

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