Method of recovering PGM
AssigneeDowa Metals & Mining Co., Ltd.
InventorsYuzuru Nakamura, Minoru Kawasaki, Katsunori Yamaguchi
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Abstract
A method of suppressing a distribution of PGM into a Cu2O slag in an oxidation smelting of a method of recovering PGM, is provided, including: carrying out reduction smelting to a treatment target member containing PGM, Cu and/or Cu2O, and flux, to thereby generate a molten slag and a Cu alloy containing PGM; and oxidizing and melting the Cu alloy containing the PGM, to thereby generate a Cu2O slag containing PGM and the Cu alloy, with more concentrated PGM concentration than the Cu alloy containing the PGM, wherein when carrying out the oxidation smelting, acidic oxide or basic oxide is added.
Claims6
A method of recovering Platinum Group Metals (PGM), the method comprising:
- carrying out reduction smelting to a treatment target member containing PGM, at least one of Cu and Cu2O, and flux, to thereby generate a molten slag and a Cu alloy containing PGM;
- and
- oxidizing and melting the Cu alloy containing the PGM, to thereby generate a Cu2O slag containing PGM and the Cu alloy, with more concentrated PGM concentration than the Cu alloy containing the PGM,
- wherein when carrying out the oxidizing and melting, acidic oxide or basic oxide is added,
- the acidic oxide is SiO2, and
- the basic oxide is at least one kind selected from a group consisting of Na2O, Na2CO3, and NaHCO3.
Dependencies are inferred from the claim text.