METHOD OF PRODUCING OF NIOBIUM AND TANTALUM OXIDES FROM ORE CONCENTRATES

摘要

FIELD: metallurgy.SUBSTANCE: invention relates to hydrometallurgy, in particular to the technology of processing of ore concentrates of niobium and tantalum. The method of producing of niobium and tantalum oxides from columbite (tantalite) concentrate includes its opening by ammonium fluorides and sulphuric acid, subsequent release, purification and separation of niobium and tantalum salts by extraction. Note that the concentrate is fluorinated by melting of a mix of fluorides of ammonium at a temperature of 110-240°C within 0.5-5 hours, the discharged gases are absorbed by water with producing of an ammonia solution.EFFECT: invention provides the cost-saving and low-waste method of processing of niobium and tantalum ore concentrates, and also low specific consumption of chemicals.4 cl, 1 dwg, 2 ex