Nickel recovery from a high ferrous content laterite ore
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United States of America Patent
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Jun 24, 2014
Grant Date -
Sep 29, 2011
app pub date -
May 12, 2008
filing date -
May 14, 2007
priority date (Note) -
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Abstract
A process is described for the recovery of nickel and/or cobalt from laterite or partially oxidized lateritic ores having a substantial proportion of the iron present in the ferrous state. The process includes providing a laterite or partially oxidized laterite ore wherein a substantial proportion of the iron present in the ore is in the ferrous state; acid leaching the ore to provide a product leach solution containing at least ferrous iron, nickel and cobalt together with acid soluble impurities; and recovering the nickel and cobalt from the product leach solution with a selective ion exchange resin in an ion exchange process leaving the ferrous iron and other acid soluble impurities in the raffinate.
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