Biooxidation of a Refractory Gold Ore: Implications of Whole-Ore Heap Biooxidation

Bo Wei Chen; Jian Zhi Sun; He Shang; Biao Wu; Jian Kang Wen

doi:10.4028/www.scientific.net/SSP.262.65

Paper Titles

Microbial Population of Industrial Biooxidation Reactors
p.48

An XPS and XANES Study on the Bioleaching of Arsenopyrite with or without Pyrite
p.53

Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms
p.57

Bioleaching of Copper Slag Material
p.61

Biooxidation of a Refractory Gold Ore: Implications of Whole-Ore Heap Biooxidation
p.65

Approaches for Eliminating Bacteria Introduced during In Situ Bioleaching of Fractured Sulfidic Ores in Deep Subsurface
p.70

Attachment of Acidithiobacillus ferrooxidans and Bioleaching of Chalcopyrite under Influence of Organic Substances Associated with Copper Solvent Extraction
p.75

Bioleaching for Removal of Chromium and Associated Metals from LD Slag
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Examining the Effects of Typical Reagents for Sulfide Flotation on Bio-Oxidation Activity of Ferrous Iron Oxidizing Microorganisms
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HomeSolid State PhenomenaSolid State Phenomena Vol. 262Biooxidation of a Refractory Gold Ore:...

Biooxidation of a Refractory Gold Ore: Implications of Whole-Ore Heap Biooxidation

Abstract:

The Sawayardun Gold Mine, the first Muruntau type gold mine in China, was located in the south Tianshan Mountain, Xinjiang Province. The gold reserve was 127 t with an average gold grade of 2.36 g/t. Due to the high content of arsenic and antimony, the traditional flotation-roasting-cyanidation process was not suitable. The direct cyanidation gold extraction for the raw ore was 44.70 %. Thus, biooxidation experiments in shaker flasks were conducted for this ore. The optimum conditions were obtained as inoculation volume 10 %, initial pH 1.7, pulp density 15 %, temperature 33 °C, leaching time 10 days, with the arsenic oxidation rate of 75.12 %. Then the biooxidation residues were test for gold leaching using NaCN, green gold leaching agent and thiourea. After 24 h leaching rate at pulp density of 33%, gold leaching agent dosage of 2 kg/t ore, the gold extraction for NaCN, green gold leaching agent and thiourea were 91.50 %, 86.23 % and 91.09 %, respectively. The high gold extraction showed a bright future for the whole-ore heap biooxidation of this refractory gold ore.

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Periodical:

Solid State Phenomena (Volume 262)

Pages:

65-69

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.262.65

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Online since:

August 2017

Authors:

Bo Wei Chen*, Jian Zhi Sun, He Shang, Biao Wu, Jian Kang Wen

Keywords:

Biooxidation, Heap Leaching, Refractory Gold Ore

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