FIELD: mining industry. SUBSTANCE: invention, in particular, relates to recovery of niobium and tantalum from wastes containing niobium and tantalum fluorides together with radioelements. Initial material is digested in sulfuric acid to form slime that is separated. Liquid phase containing niobium, tantalum, and radioactive metal is brought into contact with organic extractant into which niobium and tantalum are transferred to by further isolated therefrom. Radioactive metal, in particular uranium remains in aqueous phase and is then recovered with the aid of extraction or ion exchange. Solid slime is subjected to pyrolysis hydrolysis at 700 C to separate acid components: gaseous sulfuric and hydrofluoric acids. EFFECT: increased recovery of valuable components from the ore and concentrate dissolving residues, recuperated acids, and reduced radioactivity in wastes suitable to be rejected. 10 cl, 2 dwg, 1 tbl
