Enhancement of bio-oxidation of refractory arsenopyritic gold ore by adding pyrolusite in bioleaching system

被引：28
|
作者：
Zhang, Xu [1 ,2 ]
Feng, Ya-li [1 ]
Li, Hao-ran [2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Civil & Environm Engn, Beijing 100083, Peoples R China
[2] Chinese Acad Sci, State Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2016年 / 26卷 / 09期
关键词：
arsenopyritic gold ore; pyrolusite; bio-oxidation; Acidithiobacillus ferrooxidans; HIGH-SULFUR; CONCENTRATE; OXIDATION; EFFICIENCY; MANGANESE; MECHANISM;
D O I：
10.1016/S1003-6326(16)64339-X
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Pyrolusite was added in the bioleaching process to enhance the bio-oxidation process. Bioleaching tests at different dosages of pyrolusite ore, pH and inoculation amounts of Acidithiobacillus ferrooxidans were studied. The results showed that the time of the bio-oxidation process was decreased obviously and the arsenic leaching rate reached 94.4% after the bioleaching. The bio-oxidation of arsenopyrite and the effective extraction of manganese from pyrolusite were achieved by the bioleaching process. After bioleaching, the leaching rate of gold from the reaction residues reached 95.8% by cyanide leaching. In the bio-oxidation process, pyrolusite increased the redox potential of the solution to accelerate the bioleaching rate. The experiment showed that there were two reaction modes in the bioleaching process.
引用
收藏
页码：2479 / 2484
页数：6
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