FIELD: nonferrous metal engineering. SUBSTANCE: refinement of aluminium and its alloys from sodium and calcium is achieved by melting aluminium, eliminating dross, applying on the melt surface sodium chloride and aluminium fluoride (0.85-0.9 to 1 by weight) flux followed by agitation, ageing, dross elimination, and pouring out of aluminium. The process is carried out at the temperature 710-740 C. EFFECT: increased degree of refinement, shortened time of the process, reduced hygroscopicity and volatility of the flux. 1 tbl
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