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Heap Leach Processing of Gold Ores.

Authors
Heinen-HJ; Peterson-DG; Lindstrom-RE
Source
Joint Int'l Petroleum Mech Eng & Pressure Vessels & Piping Conf Mexico 9/76 PP 1-36 :1-36
Link
NIOSHTIC No.
10009958
Abstract
This Bureau of Mines paper reviews recent developments in the heap leaching of gold ores with dilute cyanide solution and the recovery of the gold and associated silver from the pregnant effluents by a carbon adsorption-desorption process. It describes mineralogical considerations, experimental work, field studies, and commercial operations. New process developments include the application of (1) alcohol additives to the conventional hot alkaline cyanide strip solution to enhance gold desorption from precious metal-laden activated carbon and (2) na2s precipitation of the associated silver from cyanide mill solutions as a means of reducing the inventory of carbon required for precious metal adsorption from heap leach effluents. Application of this procedure to carbon stripping effluents results in the production of low-silver bullion by subsequent electrowinning.
Publication Date
19760101
Document Type
OP;
Fiscal Year
1976
Identifying No.
OP 104-76
NIOSH Division
RERC;
Source Name
Joint Int'l. Petroleum Mech. Eng. & Pressure Vessels & Piping Conf., Mexico, 9/76, PP. 1-36
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division