Processing gold ores using heap leach-carbon adsorption methods.
Heinen-HJ; Peterson-DG; Lindstrom-RE
Reno, NV: U.S. Department of the Interior, Bureau of Mines, IC 8770, 1978 Jan; :1-21
This Bureau of Mines report reviews the recent developments in the heap leaching of gold ores with dilute cyanide solutions and the recovery of gold and associated silver from the pregnant effluents by a carbon adsorption-desorption method. Mineralogical considerations, experimental work, field studies, and commercial operations are described. Also presented are recent process advances developed by the Bureau, including the application of alcohol additives to the conventional hot alkaline cyanide strip solution to enhance gold desorption from precious metal-laden activated carbon, and Na2S precipitation of the silver from gold- silver cyanide solutions as a means of reducing the inventory of carbon required for precious-metal adsorption from heap leach effluents and for the production of low-silver bullion from activated carbon stripping solutions.
Mining-industry; Mineral-processing; Gold-mines; Metal-refining; Metallurgical-processes; Metals
IH; Information Circular
NTIS Accession No.
Reno, NV: U.S. Department of the Interior, Bureau of Mines, IC 8770