C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
165/2, 53/225, 5
C22B 3/04 (2006.01) B01D 11/00 (2006.01) C22B 3/00 (2006.01) C22B 3/24 (2006.01)
Patent
CA 1273209
ABSTRACT OF THE DISCLOSURE In gold and/or silver cyanide leaching- adsorption processes employing solid adsorbents such as activated charcoal, the overall efficiency in the recovery of gold and/or silver from ores or the like is greatly increased by contacting the cyanide slurry containing the gold and/or silver, with oxygen gas instead of normal air. A generally pure oxygen gas can be bubbled into a vessel containing the slurry, and a cover (e.g. a floating cover) may be provided on the vessel to reduce the oxygen transfer out of the solution and to facilitate pressurization of the system with an oxygen atmosphere. The procedures of the invention are applicable to carbon-in-pulp (CIP), and carbon-in- leach (CIL) processes and related processes using resins. Deaeration of the ore slurry can be practiced prior to the introduction of the oxygen.
503877
Brison Robert
Elmore Carl
Mitchell Phillip
Brison Robert
Elmore Carl
Fitzsimmons Macfarlane
Kamyr Inc.
Mitchell Phillip
LandOfFree
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