METHOD FOR HYDROMETALLURGICAL REPROCESSING OF ZINC-CONTAINING DUST FROM METALLURGICAL PRODUCTION Russian patent published in 2016 - IPC C01G9/00 C01G11/00 C22B3/08 C22B19/00 C22B17/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to processing wastes containing non-ferrous metals (zinc and cadmium) of agglomeration, blast-furnace, rolling, and steel-making plants, and can be applied in ferrous and nonferrous metallurgy. Method for hydrometallurgical reprocessing of zinc-containing dusts from metallurgical production involves leaching of above raw material with sulphuric acid solution followed by dissolution of non-ferrous metal compounds in form of sulphates, and separation of iron-containing precipitate to obtain solution containing non-ferrous metals. At that, leaching is performed in autoclave conditions at temperature 140 to 200°C, at sulphuric acid concentration 220 to 250 g/l, and holding time of 2 hours ensuring recovery of up to 95 to 98 % zinc and cadmium into solution.

EFFECT: invention enables processing of zinc-containing wastes in one unit and one technological process, obtaining solution, which can be recycled using known techniques to produce commercial-grade zinc-containing product, and reduce irrecoverable loss of valuable components.

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