Electrolyte for producing aluminum by molten electrolysis

摘要

The invention relates to nonferrous metallurgy, and specifically to the composition of an electrolyte for electrolytically producing aluminum by the electrolysis of molten forms of fluoride. The proposed electrolyte contains, by mass percentage: sodium fluoride: 26-43; potassium fluoride: up to 12; lithium fluoride: up to 5; calcium fluoride: 2-6; alumina: 2-6; aluminum fluoride and admixtures: the remainder. The technical result is the increased solubility of alumina in an electrolyte at a temperature of 830-930 degrees centigrade. The claimed electrolyte does not break-down carbon and inert electrode materials, and special methods are not needed for cleaning the aluminum of melt components.