METHOD FOR RECOVERY OF ZINC AND IRON FROM ZINC- AND IRON-CONTAINING MATERIALS (VERSIONS) Russian patent published in 1998 - IPC

FIELD: hydrometallurgy; methods for recovery of zinc and other metals from sulfide materials also containing iron, and production of commercial iron. SUBSTANCE: method includes leaching of sulfide materials under oxidizing conditions by two-stage method of counterflow leaching under pressure with obtaining of zinc-containing solution from which zinc is recovered by conventional methods such as electrochemical recovery with subsequent reducing leaching to produce lead- and silver-containing product containing practically all lead and main part of silver contained in zinc-containing sulfide material and solution with high content of iron in bivalent state, from which practically clean commercial and economically acceptable iron is produced in the form of hematite which contains a larger part of soluble iron present in zinc-containing sulfide materials. EFFECT: higher efficiency. 9 cl, 5 dwg 4 tbl