A method for recovering graphite black powder

CN122102116APending Publication Date: 2026-05-29GEM CO LTD +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GEM CO LTD
Filing Date
2026-03-26
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies for recycling graphite black powder from waste lithium batteries suffer from problems such as high energy consumption, equipment corrosion, severe graphite loss, and low recovery rates of valuable metals due to the presence of aluminum and fluorine impurities, making it difficult to achieve efficient recovery of all components.

Method used

A multi-component eutectic alkali composition was mixed with a calcination aid and then ball-milled. Subsequently, it was calcined at low temperature and alkali washed. Through the buffering alkalinity, complexing of aluminum ions, and reduction protection of the eutectic alkali, the efficient conversion of aluminum and fluorine impurities and the purification of graphite were achieved.

Benefits of technology

Achieving efficient conversion of aluminum/fluorine impurities at low temperatures reduces energy consumption, maintains the integrity of graphite structure, solves the interference problem in the recycling process of valuable metals, conforms to the concept of green circular economy, and has significant economic and environmental benefits.

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Abstract

The application provides a graphite black powder recovery method, which comprises the following steps: (1) mixing graphite black powder, a multi-component eutectic alkali composition and a calcination aid, and performing ball milling to obtain a ball milling material; the multi-component eutectic alkali composition comprises at least four alkali metal compounds; (2) calcining the ball milling material to obtain a calcined material; and (3) washing the calcined material with alkali to obtain purified graphite. The graphite black powder recovery method provided by the application removes aluminum and fluorine first, which creates favorable conditions for efficient recovery of valuable metals such as lithium, copper, nickel and cobalt through subsequent acid washing, so that full-component efficient gradient recovery of the recovered graphite is realized, the requirement of impurity content of high-end regenerated graphite negative electrode material is met, and the application prospect is wide.
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