Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate
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United States of America Patent
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May 27, 2003
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app pub date -
Jun 19, 2002
filing date -
Sep 18, 2000
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Abstract
A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an acid solution, and subjecting the slurried flotation concentrate to a chlorine leach at atmospheric pressure followed by an oxidative pressure leach. After liquid-solids separation and purification of the concentrate resulting in the removal of copper and cobalt, the nickel-containing solution is directly treated by electrowinning to recover nickel cathode therefrom.
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