METHOD OF REFINING ALUMINIUM AND ALLOYS THEREOF Russian patent published in 1998 - IPC

FIELD: metallurgy of nonferrous metals, more particularly recovery of secondary aluminium bearing stock. SUBSTANCE: claimed method is used for reducing harmful discharges and cutting down expenses due to using refining agent on greater scale. Claimed method makes it possible to make copper chloride less volatile when copper chloride is alloyed with alkaline metal chlorides in Cu/Me⁺ ratio of 1: (0.9-1.1). When aluminium alloy melt is treated with chloride melt, amount of cooper chloride used increases from 70 to 95% or more. EFFECT: more efficient refining method. 1 tbl