FIELD: useful mineral enrichment. SUBSTANCE: reagent containing bacterial cellulose is used as depressor for silicate materials. Bacterial cellulose prepared with the help of cellulose-forming bacteria strain (Acetobacter genus being used) is added immediately during flotation or before producing aqueous mineral pulp. Bacterial cellulose is used together with carboxymethylcellulose, bacterial cellulose's quantity being 0.005-0.75 kg per 1 t of origin ore. EFFECT: improves efficiency of the method. 11 cl, 9 tbl
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