Electrochemical Studies on the Flotation of Sulphide Minerals with Special Reference to Pyrite-Sphalerite—I. Cyclovoltammetry and Pulp Potential Measurements
- 1 July 1987
- journal article
- research article
- Published by Maney Publishing in Canadian Metallurgical Quarterly
- Vol. 26 (3) , 167-172
- https://doi.org/10.1179/000844387795429910
Abstract
The electrochemistry of pyrite-sphalerite flotation system has been studied by cyc1ovoltammetry and pulp potential measurements. The voltammogram of pyrite showed an anodic reaction interpreted as the oxidation of sulphide to sulphur. No oxidation was indicated in the voltammogram of un activated sphalerite. The voltammogram of sphalerite activated with Cu2+ showed an anodic wave. This is interpreted as the oxidation of CuS (formed by the interaction of Cu2+ and ZnS) to sulphur. A possible explanation is given for the depressant action of SO2 on sphalerite. Pulp potential measurements of pyrite and sphalerite showed a sharp drop to the cathodic region with nitrogenation. The implication of these results in the flotation of pyrite and sphalerite are discussed.Keywords
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