| 摘要 |
Nickel and cobalt are recovered from acid leach liquor containing such impurities as iron and aluminum obtained from the acid leaching of nickeliferous materials (such as sulfuric acid or nitric acid leach liquor), e.g. low-grade nickeliferous oxidic materials by adjusting the leach liquor, in the case of a sulfuric acid leach, to a pH range of about 0.5 to 4, or, more advantageously, to about 0.6 to 1.5, or in the case of a nitric acid leach to a pH of about 0.15 to 2.5, at an elevated temperature in excess of 130 DEG C at a pressure ranging from about 225 psig to 1000 psig to precipitate major amounts of the iron and aluminum, which precipitate is then separated from the leach liquor. Thereafter, the nickel and cobalt are separated from the treated leach liquor.
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