Dissolution of Pyrite Particles by Chemical Oxidation and Bioleaching

Zhi Wu; Shui Ping Zhong; Zhong Sheng Huang; Ren Man Ruan; Zeng Ling Wu; Gang Zou

doi:10.4028/www.scientific.net/AMR.634-638.3059

Paper Titles

Microstructures of Surface Alloyed Carbon Steel Fabricated by Ferrous-Tungsten and Carbon Powders
p.3038

Structure and Properties of TiBCN Coatings Synthesized Using Unbalanced Magnetron Sputtering
p.3044

Surface Hydrophobic Modification of T-ZnOw with Silane Coupling Agent
p.3048

Novel Synthesis and Characterization of Titanium Carbide Coatings on Graphite Flakes
p.3052

Dissolution of Pyrite Particles by Chemical Oxidation and Bioleaching
p.3059

Dynamic Study on Lime Carbonation
p.3065

Effect of pH on PCP Remediation by Smectite Supported Pd / Fe
p.3071

Microstructure Refinement of Medium Carbon Steel through Ti Deoxidation
p.3075

Influence on Concentration of Magnetite with Changing of Fe³⁺/Fe²⁺ in Copper Slag
p.3080

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 634-638Dissolution of Pyrite Particles by Chemical...

Dissolution of Pyrite Particles by Chemical Oxidation and Bioleaching

Abstract:

Dissolution of pyrite by chemical oxidation and bioleaching were studied with using short-term batch experiments. The results show that the rate of oxidative dissolution of pyrite increases with the increasing concentration of ferric in ferric sulfate solutions. With the corresponding in the bioleaching, the leaching rate of pyrite is markedly affected by the Eh of the solution. The ferric/ferrous ratio controls the relative rate of the oxidation reactions involved in the process. Additionally, the leaching rate of pyrite is controlled by the pH. The phase analysis of products indicated that S2- 2oxidation can produce S0 and SO2- 4under these conditions. On the basis of predecessors and using these species，the simplest expected oxidation mechanism is S2O2- 3regarded as the intermediate mechanism during the oxidation process.

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Periodical:

Advanced Materials Research (Volumes 634-638)

Pages:

3059-3064

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.634-638.3059

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Online since:

January 2013

Authors:

Zhi Wu, Shui Ping Zhong, Zhong Sheng Huang, Ren Man Ruan, Zeng Ling Wu, Gang Zou

Keywords:

Bioleaching, Pyrite, Reaction Mechanism, Reaction Order, Refractory Gold Ore

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