FIELD: metallurgy.
SUBSTANCE: procedure consists in electrolysis of melt KF-NaF-AlF3 with additives Al2O3 at temperature of electrolyte 700-900°C and at maintaining cryolite ratio (KF+NaF)/AlF3 from 1.1 to 1.9. Electrolysis is carried out at anode density of current not more, than 1.0 A/cm2 and cathode density of current not over 0.9 A/cm2.
EFFECT: raised efficiency at simultaneous reduction of specific consumption of electric power and reduced cost of known procedure of aluminium electrolytic production; low rate of corrosion of electrode materials.
3 cl, 1 dwg, 1 tbl
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Authors
Dates
2011-04-10—Published
2008-08-20—Filed