Journal article
The effects of halides in the electrowinning of zinc. I. Oxidation of chloride on lead-silver anodes
Hydrometallurgy, Vol.173, pp.125-133
2017
Abstract
A study of the kinetics of the anodic oxidation of chloride ions on the surface of lead-silver anodes used for the electrowinning of zinc has shown some interesting and practically important results. Oxidation of chloride does not occur on a PbSO4 surface but occurs readily on a PbO2 surface. Oxidation of chloride occurs at the mass-transport controlled rate at the operating potentials of anodes during the electrowinning of zinc in the absence of manganese in the electrolyte. However, the rate of oxidation of chloride ions is significantly lower in the presence of manganese ions in the concentration range 1 to 5 g/L. These results have been compared with plant observations that confirm the lower rate of chlorine generation in the presence of manganese. The use of periodic current reversal does not increase the rate of oxidation of chloride ions in the presence of manganese ions. The rate of anodic oxidation of chloride in the presence of manganese ions is too low to be of practical value in controlling the chloride levels during the electrowinning of zinc.
Details
- Title
- The effects of halides in the electrowinning of zinc. I. Oxidation of chloride on lead-silver anodes
- Authors/Creators
- M. Nicol (Author/Creator) - Murdoch UniversityC. Akilan (Author/Creator) - Murdoch UniversityV. Tjandrawan (Author/Creator) - Murdoch UniversityJ.A. Gonzalez (Author/Creator) - Teck (Canada)
- Publication Details
- Hydrometallurgy, Vol.173, pp.125-133
- Publisher
- Elsevier BV
- Identifiers
- 991005541463807891
- Copyright
- © 2017 Elsevier B.V.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- International collaboration
- Citation topics
- 2 Chemistry
- 2.210 Corrosion & Deposition Chemistry
- 2.210.2222 Lead-Acid Battery
- Web Of Science research areas
- Metallurgy & Metallurgical Engineering
- ESI research areas
- Materials Science