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Double Roast-leach-electrowinning Process for Chalcopyrite Concentrates.

Authors
Shirts-MB; Bloom-PA; McKinney-WA
Source
NTIS: PB 240 144 :33 pages
Link
NIOSHTIC No.
10007580
Abstract
Numerous alternative processes have been proposed as being potentially more economical or less polluting than the traditional smelting of copper sulfide concentrates. One such process as recently developed in the laboratory by the Bureau of Mines is composed of a two-stage fluid-bed, oxidation-reduction roasting followed by ammoniacal leaching, solvent extraction, and electrowinning. A copper-leaching recovery of 97.4 percent was obtained, and electrolysis of the acid strip solution deposited metal assaying 99.99 percent copper. The roaster gases contain over 95 percent of the sulfur at a concentration of 12 percent, which is better suited for acid making or elemental sulfur production than conventional smelter gas. When considering byproduct recovery, a preliminary estimate indicates copper production costs are comparable with that of conventional smelters.
Publication Date
19750101
Document Type
IH; Report of Investigation;
Fiscal Year
1975
NTIS Accession No.
PB-240144
NTIS Price
A04
Identifying No.
RI 7996
NIOSH Division
SLRC;
Source Name
NTIS: PB 240 144
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