Title

Effect of Cobalt and Iron Concentration on the Potential for Oxygen Evolution from Pb-Ca-Sn Anodes in Synthetic Copper Electrowinning Electrolytes

Abstract

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.

Department(s)

Materials Science and Engineering

Comments

Minerals, Metals and Materials Series

Keywords and Phrases

Anode potential; Cobalt; Copper electrowinning; Iron; Manganese

International Standard Serial Number (ISSN)

2367-1181

Document Type

Book - Chapter

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 Minerals, Metals and Materials Society (TMS), All rights reserved.

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