Process for recovery of nickel and cobalt from laterite ores using ion exchange resin
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United States of America Patent
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Apr 30, 2013
Grant Date -
Aug 5, 2010
app pub date -
Nov 12, 2007
filing date -
Nov 10, 2006
priority date (Note) -
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Abstract
The process, according to the invention, comprises the following stages: (a) processing (1) of the laterite ore (O) by crushing, scrubbing, attrition, separation, and high-intensity magnetic separation; (b) Leaching (2) of the non-magnetic fraction (CN) obtained form the previous stage (a); (c) optionally, neutralization (3) of the effluent from the leaching and/or solid-liquid separation stages (4); (d) treatment of the effluents from stages (b) or (c) using an ion-exchange hybrid system (5) comprising at least one circuit for removal of impurities and at least one circuit for recovery of nickel and cobalt; (e) elution (6) of the ion-exchange resin used; (f) separation, purification, and recovery (7) of the nickel and cobalt.
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