ALLOY TREATMENT METHOD

WIPO Patent Application WO/2023/054159

A1

Provided is a method for efficiently obtaining a solution containing nickel and/or cobalt from alloys containing nickel and/or cobalt and copper, such as waste lithium-ion batteries.　The present invention pertains to an alloy treatment method for obtaining a solution containing nickel and/or cobalt from alloys containing nickel and/or cobalt and copper, the method comprising: a leaching step S1 in which an acid solution is added to the alloys in the presence of a sulfurizing agent to perform a leaching treatment and obtain a leachate and a leaching residue; and a cementation step S2 in which a reducing agent and a sulfurizing agent are added to the resulting leachate to perform a copper removal treatment for sulfurizing at least copper contained in the leachate and obtain a post-copper removal solution and a copper removal residue, wherein the copper removal residue obtained through the copper removal treatment in the cementation step S2 is repeatedly subjected to the leaching step S1 and subjected to a leaching treatment together with the alloys.

JP2745429	[Title of Invention] Method for treating nickel silicate ore
JP6948481	How to collect valuables

TAKENOUCHI HIROSHI (JP)
SHOUJI HIROFUMI (JP)
MATSUOKA ITSUMI (JP)
MATSUGI TAKUMI (JP)
SANJO SHOTA (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)

PCT/JP2022/035340

April 06, 2023

September 22, 2022

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SUMITOMO METAL MINING CO (JP)

C22B23/00; C22B3/06; C22B3/44; C22B3/46; C22B7/00; C22B15/00; H01M10/54

WO2021166755A1

2021-08-26

JP2019108586A	2019-07-04
JP2019077912A	2019-05-23
JPS63259033A	1988-10-26
JP2016040406A	2016-03-24
JP2013194269A	2013-09-30
JP2012172169A	2012-09-10
JPS63259033A	1988-10-26

SHOBAYASHI Masayuki et al. (JP)

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