FIELD: paint and varnish, ceramic, building, leather and paper industries. SUBSTANCE: titanium-containing concentrates are 1 cusho with hydrofluoric acid, iron is precipitated with ammonia solution at pH of 4-8. Titanium remains in solution. After mixing, zinc or iron may be added to solution to increase precipitation of iron from ore. After precipitation of iron fluorides, addition of soluble sulfides to filtrate increases degree of recovery of iron to 99.95%. EFFECT: more efficient separation method. 3 cl
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