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Oxidation Process for Improving Gold Recovery from Carbon-Bearing Gold Ores.

Authors
Scheiner-BJ; Lindstrom-RE; Henrie-TA
Source
NTIS: PB 205 500 :14 pages
Link
NIOSHTIC No.
10008809
Abstract
Carbonaceous gold-bearing ores of the type that occur in north- central and northeastern Nevada were investigated by the Bureau of Mines as part of its heavy metals program. Specific objectives were to identify the carbon and organic compounds that prevent adequate gold recovery from the ore by cyanidation and to develop an economical process that would overcome the detrimental effect of the carbonaceous constituents. Activated carbon and long-chain organic compounds containing sulfur and nitrogen were found in the ore. Part of the material consisted of stable gold organic complexes. A mild oxidation technique that allowed gold extraction as high as 96 percent by subsequent cyanidation was developed. A variety of oxidants was shown to be effective in improving gold recovery, including chlorine and sodium hypochlorite (naocl). An electrolytic oxidation process was developed that was particularly advantageous from an economic and effectiveness standpoint.
Publication Date
19710101
Document Type
IH; Report of Investigation;
Fiscal Year
1971
NTIS Accession No.
PB-205500
NTIS Price
A03
Identifying No.
RI 7573
NIOSH Division
RERC;
Source Name
NTIS: PB 205 500
State
NV;
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