Journal ArticleDOI
Untangling galvanic and passivation phenomena induced by sulfide minerals on precious metal leaching using a new packed-bed electrochemical cyanidation reactor
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TLDR
A packed-bed electrochemical reactor (PBER) was developed and tested to decouple and quantify the individual contributions of passivation phenomena (PP) and galvanic interactions (GI) on precious metal (gold and silver, PM) leaching rates during the cyanidation of sulfide-rich ores as mentioned in this paper.About:
This article is published in Hydrometallurgy.The article was published on 2011-05-01. It has received 35 citations till now. The article focuses on the topics: Chalcocite & Gold cyanidation.read more
Citations
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A review of the structure, and fundamental mechanisms and kinetics of the leaching of chalcopyrite.
TL;DR: There is general agreement in the literature that chalcopyrite leaching is significantly affected by solution redox potential with an optimum E(h) range suggesting the participation of leach steps that involve both oxidation and reduction.
Journal ArticleDOI
Presentation on mechanisms and applications of chalcopyrite and pyrite bioleaching in biohydrometallurgy – a presentation
Huang Tao,Li Dongwei +1 more
TL;DR: The differences of mechanisms of the bioleaching and biooxidation on metal sulfides can be more clearly and explicitly understood by summarizing and comparing the two classic minerals, chalcopyrite and pyrite.
Journal ArticleDOI
Collector attachment to lead-activated sphalerite – Experiments and DFT study on pH and solvent effects
TL;DR: In this article, the interactions of diisobutyl dithiophosphinate with bare (unactivated) and lead-activated sphalerite were studied both experimentally and through DFT simulations.
Journal ArticleDOI
Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum
Xingxing Wang,Xingxing Wang,Rui Liao,Rui Liao,Hongbo Zhao,Hongbo Zhao,Maoxing Hong,Maoxing Hong,Xiaotao Huang,Xiaotao Huang,Hong Peng,Wen Wen,Wenqing Qin,Wenqing Qin,Guanzhou Qiu,Guanzhou Qiu,Huang Caoming,Huang Caoming,Jun Wang,Jun Wang +19 more
TL;DR: In this paper, the effect of pyrite on bornite bio-leaching by Leptospirillum ferriphilum was investigated and a mechanism model was proposed based on all the observations.
Journal ArticleDOI
Effects of galvanic interaction between galena and pyrite on their flotation in the presence of butyl xanthate
TL;DR: In this article, the effects of galvanic interaction between pyrite and galena on their flotation and electrochemical characters were studied by electrochemical, adsorption, flotation, and FTIR techniques, respectively.
References
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Book
The chemistry of gold extraction
John Marsden,Iain House +1 more
TL;DR: In this paper, historical developments process mineralogy process selection metallurgical development principles of gold hydrometallurgy oxidative pretreatment leaching solution purification and concentration recovery surface chemical methods refining effluent treatment industrial applications.
Journal ArticleDOI
Aqueous Solubilities, Solubility Products and Standard Oxidation‐Reduction Potentials of the Metal Sulfides
TL;DR: In this article, thermodynamic data, incorporating a new free energy of formation for aqueous S2− of 111 (± 2) kJ/mol at 25°C, indicate that solubility products of the insoluble metal sulfide salts are several orders of magnitude smaller than previously considered.
Journal ArticleDOI
Kinetics of reaction of cyanide and reduced sulfur species in aqueous solution
Richard G. Luthy,Samuel G. Bruce +1 more
Journal ArticleDOI
The Anodic Dissolution of Gold in Cyanide Solutions
K. J. Cathro,D. F. A. Koch +1 more
Journal ArticleDOI
The cyanide leaching of gold in solutions containing sulfide
Matthew I Jeffrey,Paul L Breuer +1 more
TL;DR: In this article, the effect of sulfide and cyanide concentrations on the leaching reaction were investigated, and it was shown that the sulfur formed is chemically attacked by cyanide, resulting in higher leach rates at higher cyanide concentration.
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Mechanisms of galvanic interactions between gold and sulfide minerals in cyanide solution
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Xianwen Dai,Matthew I Jeffrey +1 more