Details:

Personal Author:
Sandberg, R. G. (Richard G.) ; Simpson, W. W. (Wilfred W.) ; Staker, W. L. (W. Lyman)
Sandberg, R. G. (Richard G.) ; Simpson, W. W. (Wilfred W.) ; Staker, W. L. (W. Lyman) Less -
Corporate Authors:
United States. Bureau of Mines.
Description:
"Many gold bearing ores throughout the western United States contain small quantities of mercury. The presence of mercury not only decreases the gold-loading capacity of the activated carbon, but complicates the fire refining of cathodes and creates a potential health hazard. The Bureau of Mines investigated methods to limit mercury extraction during gold ore leaching and to remove mercury from cyanide leach solutions. Mercury dissolution was reduced from 40 to 10 pct by decreasing nacn concentration from 20 lb to 0.34 Lb per ton of solution at a ph of <11. When 0.1 Lb cas per ton of ore was added to a leach slurry, mercury extraction was reduced from 27 to 0.4 pct. Less than 0.5 pct of the mercury was solubilized when <0.1 Lb cas per ton of ore, along with lime and nacn, was added to a simulated grinding circuit." - NIOSHTIC-2

NIOSHTIC no. 10004143


Subject:
[+]
Calcium Sulfide.
Cyanide Process.
Gold -- Metallurgy.
Mercury.
Precipitation (Chemistry)

Series:
Report of investigations (United States. Bureau of Mines) ; 8907
Document Type:
Report
Collection(s):
National Institute for Occupational Safety and Health
Main Document Checksum:
[+]
urn:sha256:ed2acf428baef07f1ed1f99a6e1c9395261908307cb1cb1a987597c14da3f326
File Type:

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