Bioleaching of refractory gold ore (Ⅲ)--Fluid leaching Jinya refractory gold concentrate by Thiobacillus ferrooxidans

作     者：闵小波 柴立元 陈为亮 于霞 张传福 邝中 

作者机构：Department of Metallurgical Science & EngineeringCentral South UniversityChangsha 410083China Guangxi GuangHe Industry Co.Lt.Hechi 547000China 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2002年第12卷第2期

页      面：334-339页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 080601[工学-冶金物理化学] 

主　　题：难融砷金浓缩物 流化床反应器 半连续生物滤化 难融金矿 氧化铁硫杆菌 

摘      要：A novel fluidized bed reactor was designed and installed for bioleaching in a semi continuous way, by which a process for bioleaching cyanidation of Jinya refractory gold arsenical concentrate was studied. The arsenic extraction rate reaches 82.5% after 4 day batch biooxidation of the concentrate under the optimized condition of pH 2.0, ferric ion concentration 6.5?g/L and pulp concentration 10%. And leached rate of gold in the following cyanidation is over 90%. The parameters of three series fluidized bed reactors exhibit stability during the semi continuous bioleaching of the concentrate. Arsenic in the concentrate can be got rid of 91% after 6 day leaching. Even after 4 days, 82% of arsenic extraction rate was still obtained. The recovery rates of gold are 92% and 87.5% respectively in cyaniding the above bioleached residues. The results will provide a base for further commercial production of gold development.