Precious metal recovery using thiocyanate lixiviant
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United States of America Patent
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May 26, 2009
Grant Date -
Mar 20, 2008
app pub date -
Oct 3, 2007
filing date -
Apr 4, 2003
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Abstract
A heap with precious metal-containing mineral material with precious metal locked within sulfide mineralization is subjected to bio-oxidation followed by acidic thiocyanate leaching to dissolve precious metal. Sulfide sulfur is oxidized during both of the bio-oxidation and the thiocyanate leaching.
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