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A review on electrochemical dissolution and passivation of gold during cyanidation in presence of sulphides and oxides

Ahmet Deniz Bas, Edward Ghali

2017engoldcyanidationelectrochemistrydissolutionpassivation

Abstract

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With the rapid depletion of free-milling types of gold ores, sulphidic gold ores are often oxidized prior to cyanidation due to the refractoriness. This results in the increase in the processing of oxidized gold ores. Thus, evaluation of the electrochemical dissolution of more complex and oxidized gold ores becomes ever important for the mining industry and for R&D. In this study, past achievements and recent developments in terms of electrochemical methods used in gold dissolution and passivation studies of pure gold, sulphidic, and oxidized gold ores are presented. At potentials close to open circuit potential (OCP) as in practice, slowdown in the dissolution rate of gold could be due to passivation by either adsorbed layers or surface products, or combinations thereof. Different terms such as passivation, inhibition, retarding effect, and slowdown used in gold dissolution studies have been discussed.

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Cite This Work

@article{4fae8064-e7ad-43c5-8101-c179fbd68ad2,
  title={A review on electrochemical dissolution and passivation of gold during cyanidation in presence of sulphides and oxides},
  author={Ahmet Deniz Bas and Edward Ghali},
  year={2017},
  language={en}
}
TY  - JOUR
TI  - A review on electrochemical dissolution and passivation of gold during cyanidation in presence of sulphides and oxides
AU  - Ahmet Deniz Bas
AU  - Edward Ghali
PY  - 2017
LA  - en
ER  -

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