Method for recovering valuable metal
AssigneeSumitomo Metal Mining Co., Ltd.
InventorsTomoya Hagio, Yu Yamashita
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Abstract
The purpose is to provide a method for recovering a valuable metal at low cost. The present invention is a method for recovering a valuable metal, the method comprising a step of preparing a burden material containing at least a valuable metal to obtain a raw material, a step of subjecting the raw material to an oxidation treatment and a reductive melting treatment to produce a reduced product containing an alloy and a slag, and a step of separating the slag from the reduced product to collect the alloy, in which the copper grade, which is a ratio of the mass of copper (Cu) to the total mass of nickel (Ni), cobalt (Co) and copper (Cu) contained in the alloy (i.e., a Cu/(Ni+Co+Cu) ratio), is adjusted to 0.250 or more.
Claims20
A valuable metal recovery method comprising the steps of:
- preparing a charge comprising at least a valuable metal to give a raw material;
- subjecting the raw material to an oxidation treatment and a reductive melting treatment to produce a reduced product comprising an alloy having a copper grade of 0.250 or more and a slag;
- and
- separating the slag from the reduced product to recover the alloy,
- wherein the copper grade is defined as the ratio (Cu/(Ni+Co+Cu)) of the mass of copper (Cu) to the total mass of nickel (Ni), cobalt (Co), and copper (Cu) in the alloy.
Dependencies are inferred from the claim text.