Utilization of oxygen in leaching and/or recovery procedures emp

Details Utilization of oxygen in leaching and/or recovery procedures emp Utilization of oxygen in leaching and/or recovery procedures emp

1987-09-23

1989-03-28

Straub, Gary P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 27, 75105, 75108, 75118R, B01D 1100, C22B 300

Patent

active

048162345

ABSTRACT:
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.

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