PROCESSING METHOD OF SALINE ALUMINIUM-BEARING SLAGS SO THAT COVERING FLUXES AND ALUMINIUM ALLOYS - REDUCING AGENTS ARE OBTAINED Russian patent published in 2012 - IPC C22B7/04 C22C21/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy, and namely to processing of aluminium-bearing slags, as well as to obtaining of alloys on aluminium basis by electrolysis of melts. Aluminium-bearing slag is subject to deep processing involving crushing and pulverisation to fraction size of 0.064-2 mm, water leaching of slag at water flow of 1.05-2.5 l/kg during 20-60 min in reactor with mechanical mixing, pulp filtration and evaporation of saline solution so that ready covering flux with humidity of 0.5-5% is obtained. Oxide deposit is subject after drying to electrolysis in fluoride-chloride melt at temperature of 910-990°C and cathodic current density of 0.55-1.2 A/cm² so that aluminium-based alloy is obtained.

EFFECT: invention allows full extraction of metallic aluminium from slag, reduction of amount of waste at its processing and obtaining of covering fluxes and alloys on aluminium basis for steel deoxidation and manufacture of branded alloys on aluminium basis.

2 cl, 1 ex