BIOOXIDATION OF TWO ARSENICAL REFRACTORY GOLD CONCENTRATES AND GOLD CYANIDATION

来源期刊：中国有色金属学报(英文版)1994年第3期

论文作者：Zhang Yongzhu Lu Yiyuan Zhang Chuanfu Zhao Tiancong Qiu Rongqing

文章页码：41 - 45

Key words：gold ;bacterial leaching ;refractory gold ores

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.