FIELD: process engineering.
SUBSTANCE: invention relates to flotation of minerals using water recycling and can be used in flotation of disthene and other sulphide-free ores. Proposed method comprises main and check flotation, cleaner flotation of foam product and extra flotation of middlings and anionic collector. Flotation is conducted in alkaline medium at pH 7.0-8.0 by fatty-axis collector fed together with high-molecular alkyl benzene sulfonate or polyalkyl benzene sulfonate with 1:0.75-1:2 ratio. In flotation, water pretreated by aluminium sulphate is recycled.
EFFECT: higher efficiency.
2 cl, 1 tbl, 2 ex
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