Newmont Gold Company

Other

University of Utah Research Foundation

Newmont Mining Corporation

Rong-Yu Wan

Brian Ball

Jan D Miller

Ronald L Atwood

Gopalan Ramadorai

K Marc LeVier

Sevket Acar

Richard B Clayton

A hydrometallurgical process for the recovery of precious metal values from refractory precious metal ore materials containing preg-robbing carbon by leaching with a thiosulfate lixiviant, the process comprising

Hydrometallurgical process for the recovery of precious metal values

Refractory carbonaceous sulfide ores are treated in a manner so as to improve gold recovery by a treatment in specific combination of steps whereby the ore is treated with chlorine after pretreatment and before cyanidation; the particular steps in the treatment of the ore have been found to be necessary as the conventional pretreatment will not improve the yields on any economic basis.

Treatment of refractory carbonaceous sulfide ores for gold recovery

The recovery of precious metals from refractory carbonaceous and sulfidic ores or concentrates is improved by subjecting an oxidized slurry of this type of ore to thiourea leaching in the presence of carbon instead of subjecting the slurry to cyanidation leaching.

Treatment of refractory carbonaceous and sulfidic ores or concentrates

A technique for extracting gold or silver values from an organic liquid having phosphorus or sulfur oxide groups which contains silver or gold cyanide ions by direct electrolytic deposition from the organic phase onto a cathode is disclosed.

Direct gold electrolysis from a loaded organic phase

Growing community of inventors

Salt Lake City, UT, United States of America

Rong-Yu Wan