Patent ID: 11866802
Assignee: DOWA METALS & MINING CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A method for recovering platinum group metals, comprising:
melting a material to be treated containing platinum group metals, under heating in a furnace, along with a copper source material containing at least one of a metallic copper and a copper oxide, a flux component, and a reducing agent;
separating a molten metal absorbing the platinum group metals, and a slag oxide, through difference in specific gravity;
then subjecting the molten metal absorbing the platinum group metals to an oxidation treatment to form an oxide layer and a molten metal containing metallic copper as a major component containing the platinum group metals concentrated therein; and
separating the oxide layer containing copper oxide as a major component, and the molten metal containing metallic copper as a major component containing the platinum group metals concentrated therein, through difference in specific gravity,
a silver content in the molten metal separated in melting under heating being controlled to 2,000 ppm or more and 8,000 ppm or less.