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US 2022/0259697 A1Published application
Method for recovering pgm
AssigneesWaseda University, Dowa Metals & Mining Co., Ltd., Nippon PGM Co., Ltd.
InventorsKeiichi SUGAWARA, Hiromitsu YATSUHASHI, Katsunori YAMAGUCHI, Takashi MURATA
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Abstract
There is provided a method for recovering PGM, in which at least one base metal oxide selected from a group consisting of copper oxide, iron oxide, tin oxide, nickel oxide and lead oxide is added to and melted in a molten slag, and a PGM alloy contained in the molten slag is recovered.
Claims8
A method for recovering PGM, comprising:
- placing an object to be treated containing PGM, a base metal and/or a base metal oxide, a flux, and a reducing agent in a reduction furnace used for reduction smelting, and heating a mixture thereof, to form a molten slag and a reduction furnace metal;
- extracting the molten slag from the reduction furnace to obtain a reduction furnace metal containing PGM;
- and
- transferring the reduction furnace metal to an oxidation furnace used for oxidative smelting, forming a base metal oxide slag and a PGM alloy, then, extracting the base metal oxide slag to obtain a PGM alloy enriched with PGM,
- wherein at least one base metal oxide selected from a group consisting of copper oxide, iron oxide, tin oxide, nickel oxide and lead oxide is added to the molten slag, to recover the PGM alloy contained in the molten slag.
2 more elements
Dependencies are inferred from the claim text.