FIELD: waste water treatment. SUBSTANCE: collected acidic drainage water from under mineral refuses, separately or combined with mine water is neutralized to pH 8.0-9.2 by mixing it sludge resulting from washing of ores to remove components of concrete-stowage mix. The thus obtained suspension is settled with height of water layer in accumulation pool about 2 m and sludge is stored in sludge accumulator. Cleaned and clarified water is withdrawn from the surface of sludge accumulator pool. Lime is added to ore washing sludge. EFFECT: simplified process and diminished formation of drainage water and consumption of neutralizers. 1 tbl, 4 ex
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