Details:

Personal Author:
Lei, K. P. V. (Kenneth P. V.) ; Carnahan, T. G. (Thomas G.)
Lei, K. P. V. (Kenneth P. V.) ; Carnahan, T. G. (Thomas G.) Less -
Corporate Authors:
United States. Bureau of Mines.
Description:
"The Bureau of Mines investigated a silver-catalyzed oxidative procedure for leaching an arsenical copper sulfide concentrate containing 10 pct as and 32 pct cu. Currently, there are no environmentally safe means to treat arsenical copper concentrates in the United States. Leaching was conducted in a 2-l autoclave reactor. The effects of catalyst concentration, o2 pressure, temperature, and h2so4, cu, as, and fe concentrations in the leaching solution on extractions of metals from the concentrate were determined. The best leaching conditions for extracting 95 pct cu and as and less than 21 pct fe were 260 g/l concentrate, 0.007 Mol/l (1.0G/l) agcl, 3.0 Mol/l (294 g/l) h2so4, 100 deg c, 60 psig o2, and 6 h. Copper as cuso4.5H2o was recovered by crystallization from the pregnant solution. Arsenic, as as2o3, was recovered from the copper mother liquor by solvent extraction, with tributyl phosphate, so2 reduction of as5+ to as3+ in the strip solution, and crystallization of the as3+. The silver catalyst was recovered by contacting the leached residue with a brine solution. A conceptual scheme is proposed for treating arsenical copper sulfide concentrates." - NIOSHTIC-2

NIOSH no. 10005965


Subject:
[+]
Copper -- Metallurgy.
Leaching.
Oxidation.
Sulfides.

Series:
Report of investigations (United States. Bureau of Mines) ; 9122
Document Type:
Report
Collection(s):
National Institute for Occupational Safety and Health
Main Document Checksum:
[+]
urn:sha256:0e16e062ed6b23e610449e74a89df6d80143943e939be9628c2cd5d92c23b02e
File Type:

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