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Journal article
The role of oxidants in the intensive cyanidation of gold. II. Sulfide mineral oxidation
Hydrometallurgy, Vol.228, 106364
2024
Appears in Open Access via Read & Publish Agreements
Abstract
In the intensive cyanidation of gravity gold concentrates, sodium m-nitrobenzene sulfonate (NBS) is often used to supplement dissolved oxygen as the oxidant in the process. A previous paper presented the results of a largely electrochemical study of the behaviour of NBS during cyanidation of gold. The results confirmed that NBS acts as an oxidant in the cyanidation of gold and that the mixed potential model can be applied to describe the mechanism of its action. This paper explores the corresponding oxidation of sulfide minerals, that inevitably are contained in gold concentrates, by either dissolved oxygen or NBS. Using electrochemical techniques it was found that dissolved oxygen is effective in the oxidation of several sulfide minerals at pH values between 9 and 11. The effect of cyanide on both the anodic and cathodic processes has been studied. NBS has been found to be ineffective as an oxidant for all minerals tested except galena, even in the presence of cyanide.
Details
- Title
- The role of oxidants in the intensive cyanidation of gold. II. Sulfide mineral oxidation
- Authors/Creators
- M. Nicol - School of Engineering and Information Technology and Energy, Murdoch University, Perth, AustraliaW.P. Staunton - Western Australian School of Mines: Minerals, Energy and Chemical Engineering, Faculty of Science and Engineering, Curtin University, Perth, AustraliaT. McGrath - Curtin University
- Publication Details
- Hydrometallurgy, Vol.228, 106364
- Publisher
- Elsevier B.V
- Identifiers
- 991005687463607891
- Copyright
- © 2024 The Authors
- Murdoch Affiliation
- School of Engineering and Energy
- Language
- English
- Resource Type
- Journal article
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