Patent Number: 6,251,163

Title: Method for recovering gold from refractory carbonaceous ores

Abstract: The process of the present invention recovers precious metals from refractory carbonaceous precious metal ores by floating a portion of the ground ore, blending the concentrate with an unfloated portion of the ore, autogenously autoclaving the blended material, cooling the oxidized slurry by dilution, leaching the oxidized slurry after dilution in the presence of a thiosulfate lixiviant, and recovering the precious metal by suitable techniques.

Inventors: King; James A. (West Vancouver, CA)

Assignee: Placer Dome, Inc.

International Classification: C22B 1/00 (20060101); C22B 003/06 ()

Expiration Date: 06/26/2018