Process for recovery of nickel and cobalt by heap leaching of low grade nickel or cobalt containing material
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United States of America Patent
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Jul 20, 2010
Grant Date -
Feb 15, 2007
app pub date -
Jul 13, 2004
filing date -
Jul 14, 2003
priority date (Note) -
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Abstract
A process for the recovery of nickel and cobalt from laterite ores, the process including the steps of: a) beneficiating the ore to separate it into a beneficiated upgraded ore fraction and a coarse, siliceous low grade rejects fraction which is substantially free from fines and clay materials; b) separately processing the upgraded ore fraction for the recovery of nickel and cobalt; and c) subjecting the low grade rejects fraction to a heap leach process with an acid supplemented solution to create a heap leachate for further nickel and cobalt recovery processing.
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