METHOD FOR EXTRACTING OF GALLIUM FROM SLUDGE IN ALUMINUM PRODUCTION Russian patent published in 2004 - IPC

Abstract RU 2232199 C2

FIELD: nonferrous metallurgy, in particular, obtaining of gallium from anode sludge produced upon electrolytic aluminum refining.

SUBSTANCE: method involves providing gallium oxidation resulted from melting of anode sludge at temperature of 1,180-1,260⁰C with the use of Na₂CO₃ and SiO₂ flux and oxidizing additive, such as Cu₂0. Flux consumption is 70-120% by weight of anode sludge at Na₂CO₃ to SiO₂ ratio of 2:(0.75-1). Copper oxide is added as oxidizer in an amount making 90-115% by weight of basic material. Method allows gallium extraction extent to be increased by about 30% and also blister copper to be produced.

EFFECT: increased efficiency in extracting of gallium into slag and provision for obtaining of blister copper.

3 cl, 1 tbl, 1 ex

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RU 2 232 199 C2

Authors

Lysenko A.P.

Kozhevnikov A.V.

Bystrov S.V.

Kljatskina E.A.

Bekishev V.A.

Gor'Kov V.N.

Dates

2004-07-10—Published

2001-11-13—Filed