04816234 is referenced by 15 patents and cites 18 patents.

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.

Title
Utilization of oxygen in leaching and/or recovery procedures employing carbon
Application Number
732637
Publication Number
4816234
Application Date
September 23, 1987
Publication Date
March 28, 1989
Inventor
Phillip Mitchell
Glens Falls
NY, US
Carl L Elmore
Glens Falls
NY, US
Robert J Brison
Golden
CO, US
Agent
Nixon & Vanderhye
Assignee
Kamyr
NY, US
IPC
C22B 3/00
B01D 11/00
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