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Copper Cementation in a Revolving-drum Reactor, a Kinetic Study.

Authors
Fisher-WW; Groves-RD
Source
NTIS: PB 250 740 :22 pages
Link
NIOSHTIC No.
10007625
Abstract
A kinetic investigation of copper cementation in a revolving drum was undertaken by the Bureau of Mines to explore the effects of a porous copper deposit attached to the iron surface and a fluidized slurry of copper particles surrounding the iron precipitant. The rate of cementation was found to be significantly enhanced by the increased cathodic areas provided by a porous copper deposit or the presence of a fluidized bed of copper particles contacting the iron precipitant. The cementation rate was found to be retarded by increased ionic strength, low ph, and the presence of oxygen. The cementation reaction was first order with respect to precipitant surface area. Copper cementation on iron is visualized to occur by two basic mechanisms. Precipitation may occur through a series of shorted electrochemical cells, whereby cupric ion precipitates on a growing cathodic copper deposit, or deposition may occur via a fluidized cathode of copper particles contacting the ion precipitant.
Publication Date
19760101
Document Type
IH; Report of Investigation;
Fiscal Year
1976
NTIS Accession No.
PB-250740
NTIS Price
A03
Identifying No.
RI 8098
NIOSH Division
SLRC;
Source Name
NTIS: PB 250 740
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