Copper precipitate agglomerization process

Details Copper precipitate agglomerization process Copper precipitate agglomerization process

1977-05-16

1978-04-04

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 7, 75 72, 75 91, C22B 1514

Patent

active

040825426

ABSTRACT:
Impure copper precipitates, obtained by cementation of copper from an aqueous solution, are converted into dense, unfriable, high-grade copper pellets suitable for separate smelting and refining as well as for being fed directly to anode or refining furnaces. Sufficient water is added to the copper precipitates to form a coherent, moldable mass of moist precipitates, which is then formed into pellets. The pellets are dried, and then heated to a sintering temperature of at least 750.degree. C. in a reducing atmosphere. The pellets are held at the sintering temperature for a time sufficient to form dense, unfriable, high-grade copper pellets, and the high-grade pellets are then cooled to near ambient temperature before being exposed to an oxidizing atmosphere such as air.

REFERENCES:
patent: 890563 (1908-06-01), Jones
patent: 900346 (1908-10-01), Benjamin
patent: 3700431 (1972-10-01), Themelis et al.
Chemical Abstracts, vol. 80, No. 24, paragraph 136,072j (1974).

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