FIELD: metallurgy.
SUBSTANCE: there are performed following stages: ore leaching at presence of hydrochloric acid with formation of soluble chloride of metal in solution for leaching, addition of sulphuric acid and/or sulphur dioxide into solution for leaching, regeneration of solid sulphate of metal or sulphate of metal from solution for leaching, regeneration of hydrochloric acid and continuous transformation of at least part of hydrochloric acid from solution into vaporous phase. Further, vaporous hydrochloric acid is absorbed and returned to the leaching stage. The sulphuric acid and/or sulphur dioxide are added to solution for leaching during process of leaching or after it. Valuable metal is usually chosen from group including Zn, Cu, Ti, Al, Cr, Ni, Co, Mn, Fe, Pb, Na, K, Ca, metals of platinum group and gold. Metal in sulphate of metal or sulphite of metal corresponds to valuable metal or less valuable metal in comparison with metal leached from ore, for example, magnesium.
EFFECT: raised efficiency of procedure.
14 cl, 27 dwg, 1 tbl
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|---|---|---|---|
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RU2355793C2 |
