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Preparing Copper Powder from Cemented Copper.
Groves-RD; Winter-JK; Evans-LG
NTIS: PB 203 659 :20 pages
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.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 203 659
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division