Laterite heap leaching with ferrous lixiviants
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United States of America Patent
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Jun 12, 2012
Grant Date -
Mar 10, 2011
app pub date -
Dec 24, 2008
filing date -
Dec 24, 2007
priority date (Note) -
Expired
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Abstract
A process for heap leaching a laterite that includes providing a primary and a secondary heap, with the primary heap comprising predominantly a nickel and cobalt containing sulfide or saprolitic type ore, and the secondary heap comprising predominantly a nickel and cobalt limonitic type ore; leaching the primary heap with a sulfuric acid solution to generate a solution that includes ferrous ions; and using the solution that includes the ferrous ion as the lixiviant to leach the secondary heap, to produce a pregnant leach solution that includes nickel, cobalt and manganese ions.
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