| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: invention refers to hydrometallurgy, particularly to method of leaching of base metals out of oxidised ores, for example, out of laterite ore, at extraction of nickel and/or cobalt by heap leaching. The method consists in (a) dividing ore to small and large fractions, (b) leaching of large fraction of ore in a leaching solution with a corresponding leaching agent for leaching out metals contained therein, and (c) using small fractions of ore or part of it for neutralisation or partial neutralisation of the leaching agent contained in a saturated leaching solution obtained at stage (b) to transfer certain amount or total amount of saturated leaching solution for further purifying or refining. Then a base metal, for example, nickel and/or cobalt is extracted out of the solution. ^ EFFECT: reduction of operational costs and increased efficiency of extracting metals from ore. ^ 10 cl, 1 dwg |
