Method of producing aluminum from aluminous raw material

Details Method of producing aluminum from aluminous raw material Method of producing aluminum from aluminous raw material

C - Chemistry, Metallurgy

25

C

C25C 3/06 (2006.01) C22B 3/06 (2006.01) C25C 3/18 (2006.01)

Patent

CA 2122364

2122364 9403653 PCTABS00030 The proposed method provides for one-stage treatment of an alumina-containing raw-material with a mixture of alkali metal salts of a fluorine-containing oxygen-free acid and hydrochloric acid taken at the ratio of respectively, from 5:1 to 1:7.5 parts by weight. The mixture of the salts is introduced at the quantity of 40-85 % of the total weight, and treatment is carried out at a temperature of 850-1100 ·C up to obtaining a reactional mass consisting of non-mixing fluoride-silicate and chloride-aluminate alkaline melts. The chloride-aluminate alkaline melt is separated from the obtained mass and introduced to the melt of alkali metal chlorides, and the obtained mass is subjected to electrolysis up to obtaining the desired product. The invention may be used in the fields of technology connected with the obtaining and use of aluminium.

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