Saprolite neutralisation of heap leach process
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United States of America Patent
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Jun 4, 2013
Grant Date -
Apr 14, 2011
app pub date -
Jun 16, 2009
filing date -
Jun 16, 2008
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Abstract
A heap leach process for the recovery of nickel and/or cobalt from a laterite ore, said process including the steps of: a) providing one or more heaps of a nickeliferous laterite ore; b) leaching the ore in a heap leach step by applying acid to one or more heaps to provide a pregnant leach solution; c) neutralizing the pregnant leach solution with ground saprolite ore; and d) recovering the nickel and/or cobalt from the neutralized pregnant leach solution.
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