METHOD FOR PRODUCING VALUABLE METAL

WIPO Patent Application WO/2022/239454

A1

Provided is a method for producing valuable metal from raw materials including, for example, waste lithium ion batteries by a pyrometallurgical method, said method making it possible to efficiently separate manganese included in the raw materials from metal into slag without lowering the valuable metal recovery rate.　The present invention is a method for producing valuable metal from raw materials including at least lithium, manganese, and the valuable metal, said method comprising: a reduction melting step for subjecting the raw materials to a reduction melting process so as to obtain a reduction product containing slag and molten metal that contains valuable metal; a slag separation step for recovering the molten metal from the reduction product; and an oxidation purification step for adding silicon dioxide (SiO2) as flux to the recovered molten metal and performing an oxidation melting process. In the oxidation purification step, SiO2 is added as the flux such that the SiO2/MnO weight ratio is 0.4-1.0 in the slag.

WO/2023/189211	COBALT AND NICKEL RECOVERY METHOD
WO/2023/004926	EFFICIENT ENRICHMENT, SEPARATION, AND RECOVERY METHOD FOR CHROMIUM IN CHROMIUM-CONTAINING SLUDGE IN IRON AND STEEL PLANT

HAGIO TOMOYA (JP)
YAMASHITA YU (JP)

PCT/JP2022/011406

November 17, 2022

March 14, 2022

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SUMITOMO METAL MINING CO (JP)

C22B1/02; C22B5/02; C22B7/00; C22B26/12; C22B47/00; H01M10/54

JP2012172169A	2012-09-10
EP3269832A1	2018-01-17
JP2019502826A	2019-01-31
JP2012193424A	2012-10-11
JP2013237907A	2013-11-28
JP2012172169A	2012-09-10

SHOBAYASHI Masayuki et al. (JP)

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