Process for Heap Leaching of Nickeliferous Oxidic Ores
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United States of America Patent
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Issued Date -
Jun 23, 2011
app pub date -
Jul 2, 2009
filing date -
Jul 2, 2008
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Abandoned
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Abstract
A process for the recovery of nickel and cobalt from a nickeliferous oxidic ore by heap leaching and/or atmospheric agitation leaching, the process including the steps of: mixing a sulfur containing reductant selected from reductants that do not include copper into a nickeliferous oxidic ore; leaching the reductant/ore mixture with an acidic leach reagent to produce a pregnant leach solution including nickel, cobalt, iron substantially in a ferrous form and other acid soluble impurities; and recovering the nickel and cobalt from the pregnant leach solution.
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