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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 4    No. 3    September 1994

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BIOOXIDATION OF TWO ARSENICAL REFRACTORY GOLD CONCENTRATES AND GOLD CYANIDATION
Zhang Yongzhu1; Lu Yiyuan1 ;Zhang Chua

1.Deptartment.of Nonferrous Metallurgy; Central South University of Technology; 410083 Changsha
2.Microbilolgy Institute; Academia Sinica; Beijing 100080

Abstract:The influence of pulp density , ferric ion concentration and particle size on the tank bioleaching of two kinds of refractory gold concentrates are discussed. The chemistry and mechanism of bioleaching process are also presented. The relationship between oxidation of sulfides, liberation of enclosed gold and gold cyanidation are discussed. The consumption of NaCN could be reduced by alkaline pretreatment of bioleached residues prior to cyanidation.

 

Key words: gold bacterial leaching refractory gold ores

ISSN 1672-7029
CN 43-1423/U

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