FIELD: nonferrous metallurgy. SUBSTANCE: auxiliary substance - dust from limestone roaster gas treatment is added to zinc production pulp and resultant mixture is fed on filter under continuous stirring. Precipitate is separated and removed into receiving bin. Dust is composed of (% based on pulp solids during pulp filtration): zinc cake 2-8, copper cake 4-6, lead cake 6-9, and rotary-kiln oxide. Productivity, cu.m/cu.m : 0.18-0.20, 1.4-1.6, 0.07-0.09, 0.4-0.6, respectively. EFFECT: up to twofold increased productivity. 5 cl, 4 tbl, 4 ex
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