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Gold and silver leaching practices in the United States.

Authors
Chamberlain-PG; Pojar-MG
Source
Reno, NV: U.S. Department of the Interior, Bureau of Mines, IC 8969, 1984 Jan; :1-47
NIOSHTIC No.
10003414
Abstract
The surge in gold and silver prices during the 1970's attracted many new mining operators and has rekindled interest among experienced ones. With its low capital investment requirements and fast payout, leaching has attracted many operators--particularly those with small or low-grade deposits. Although in certain situations leaching offers many advantages over conventional mining methods, many operators are uncertain how these relatively new techniques should be implemented. Consequently the Bureau of Mines has prepared this circular to disseminate information on gold and silver leaching practices, techniques, and problems. Engineering data gathered from 26 operations indicate that most ores are leached in heaps following crushing and distribution on pads. Metal values are recovered from cyanide leach solutions using either zinc precipitation or charcoal adsorption. Potential problems that may hamper on block development of a leaching operation are poor percolation characteristics of the ore, calcium salt buildup, low temperatures, and solution losses. An extensive bibliography on gold and silver leaching is appended.
Keywords
Mining-industry; Mineral-processing; Metals; Metallurgical-processes; In-situ-mining
Publication Date
19840101
Document Type
IH; Information Circular
Fiscal Year
1984
NTIS Accession No.
NTIS Price
Identifying No.
IC-8969
NIOSH Division
TCRC
Source Name
Reno, NV: U.S. Department of the Interior, Bureau of Mines, IC 8969
State
MN
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