Effect of Cobalt and Iron Concentration on the Potential for Oxygen Evolution from Pb-Ca-Sn Anodes in Synthetic Copper Electrowinning Electrolytes
It is well known that the addition of cobalt to copper sulfate-sulfuric acid electrolytes decreases the overpotential for oxygen evolution and decreases the rate of corrosion of Pb-Ca-Sn anodes. This effect, however, has not been adequately quantified in the presence of iron and manganese in this type of electrolyte. This work provides quantifiable data on the effect of cobalt concentration in the range of 0-0.6 g/L in synthetic electrowinning electrolytes with and without the presence of iron. The effect of cobalt on anode potential was determined using 2 and 24 h chronopotentiometry experiments. As expected, Pb-Ca-Sn potentials increased with decreasing cobalt concentration over the range of 0-0.6 g/L Co with and without the presence of Fe. Two regression models were developed to allow plant operations the ability to predict anode potentials as a function of cobalt concentration with or without iron in the electrolyte.
C. E. Abbey and M. S. Moats, "Effect of Cobalt and Iron Concentration on the Potential for Oxygen Evolution from Pb-Ca-Sn Anodes in Synthetic Copper Electrowinning Electrolytes," Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies, pp. 89-95, Springer International Publishing, Jan 2017.
The definitive version is available at https://doi.org/10.1007/978-3-319-51091-0_8
Materials Science and Engineering
Keywords and Phrases
Anode potential; Cobalt; Copper electrowinning; Iron; Manganese
International Standard Serial Number (ISSN)
Book - Chapter
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01 Jan 2017