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Preparing Copper Powder from Cemented Copper.

Authors
Groves-RD; Winter-JK; Evans-LG
Source
NTIS: PB 203 659 :20 pages
Link
NIOSHTIC No.
10008786
Abstract
Techniques were developed for preparing metallurgical-grade copper powder from industrially produced cement copper. Flotation was used for rejecting discrete gangue particles, acid leaching to remove residual iron and aluminum hydrogen reduction to eliminate oxygen, sintering to consolidate the fine-sized copper, and grinding to obtain copper powder. Powders prepared from six different cement copper samples contained, in percent, 98.5 to 99.0 Cu, 0.10 to 0.05 Fe, 0.10 to 0.08 Insoluble material, and the remaining individual impurities less than 0.15 percent. The apparent density, flow characteristics, and other physical properties were suitable for powder metallurgy applications. An economic evaluation showed that this process was economically feasible. Processing costs appeared modest when considering that copper powder commands a price normally about 17.5 Cents per pound over that of electrolytic copper.
Publication Date
19710101
Document Type
IH; Report of Investigation;
Fiscal Year
1971
NTIS Accession No.
PB-203659
NTIS Price
A03
Identifying No.
RI 7548
NIOSH Division
SLRC;
Source Name
NTIS: PB 203 659
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