FLUX FOR REFINING COPPER AND COPPER-BASE ALLOYS Russian patent published in 2002 - IPC

FIELD: nonferrous metallurgy. SUBSTANCE: flux contains polymethaphosphate of alkali metal as slag former and manganese oxide as solid oxidizer, which are used in the following ratio, wt.%: manganese, oxide 20-70; polymethaphosphate of alkali metal, 30-80. Flux contains: manganese dioxide, manganese sesquioxide or mixture thereof as manganese oxide; natural mineral containing manganese oxide as solid oxidizer; pyrolusite, braunite or mixture thereof as natural mineral. Flux of such composition increases refining extent as to iron, manganese, nickel and improves separation of slag from pure metal melt. EFFECT: increased efficiency and improved quality of copper and copper-base alloys. 1 tbl, 1 ex