A method for the comprehensive recovery of valuable metals from ternary lithium battery cathode materials based on magnesium salt cycle

A ternary lithium battery and positive electrode material technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problem of the direction of sulfate additives, the final treatment method is not clear, the final recovery rate is only 90%, and it is difficult to be economical Effectively deal with such problems as to achieve the effect of large promotion and application value, significant environmental and economic benefits, and reduced production costs

CN111334664BActive Publication Date: 2021-03-09XUZHOU GUOMAO VALUABLE & RARE METAL COMPREHENSIVE UTILIZATION INST

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: XUZHOU GUOMAO VALUABLE & RARE METAL COMPREHENSIVE UTILIZATION INST
Publication Date: 2021-03-09

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Abstract

The invention discloses a method for comprehensively recovering valuable metals from the cathode material of a ternary lithium battery based on magnesium salt circulation. Firstly, magnesium sulfate and the cathode powder of a ternary lithium battery are mixed in proportion and then roasted under anaerobic conditions to obtain a roasted material. Lithium-containing filtrate and water leaching slag are obtained by water immersion and filtration of roasting materials. Lithium-containing filtrate is removed by impurity and alkali precipitation to realize the priority recovery of lithium. , wherein the magnesium element is prepared to obtain the magnesium sulfate product, which is recycled in the system. The invention can realize the comprehensive recovery of all valuable metal components of nickel, cobalt, manganese and lithium, and simultaneously realize the recycling and reuse of magnesium sulfate in the system, which is beneficial to reducing the discharge of magnesium-containing wastewater and simultaneously reducing production costs.

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Description

technical field

[0001] The invention relates to a method for recovering positive electrode materials of ternary lithium batteries, in particular to a method for comprehensively recovering valuable metals from positive electrode materials of ternary lithium batteries based on magnesium salt circulation, and belongs to the technical field of recovery of valuable metals. Background technique

[0002] With the explosive growth of the use of new energy vehicles, waste power lithium-ion batteries will be one of the main solid wastes in cities in my country in the future, and their metal content is much higher than that in ores, which is a typical " Urban Minerals" are of great recycling value. Due to high energy density, high tap density, and large specific capacity, ternary lithium batteries account for an increasing proportion of the power battery market and gradually become the mainstream of power batteries. Ternary power lithium-ion batteries contain a large amount of valuable...

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