Dissolution kinetics of tellurium from gold concentrate during alkaline sulphide leaching

被引：0
|
作者：
Yang, W. [1 ,2 ]
Cao, H. [1 ,2 ]
Wang, Y. P. [3 ]
Long, T. [1 ,2 ]
Wan, H. [1 ,2 ]
Li, H. [1 ,2 ]
Dong, P. [1 ,2 ]
机构：
[1] Xian Univ Architecture & Technol, Sch Resources Engn, Xian, Shaanxi, Peoples R China
[2] Key Lab Gold & Resources Shaanxi Prov, Xian, Shaanxi, Peoples R China
[3] Baoji Univ Arts & Sci, Sch Foreign Languages, Baoji, Peoples R China
来源：
JOURNAL OF THE SOUTHERN AFRICAN INSTITUTE OF MINING AND METALLURGY | 2019年 / 119卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Gold concentrate; tellurium leaching; alkaline suphide leaching; kinetics; BEARING MATERIALS; ACID; CDTE; RECOVERY;
D O I：
10.17159/2411-9717/693/2019
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Alkaline sulphide leaching was adopted to extract tellurium from tellurium-bearing gold concentrate for the first time. The tellurium leaching kinetics were studied. The influence of average particle size, stirring speed, leaching temperature, Na2S concentration, and NaOH concentration on the tellurium extraction were investigated. It was found that tellurium extraction could reach 79.14% under the optimum conditions: 17.77 mu m average particle size, 500 r/min stirring speed, 80 g/L Na2S concentration, 30g/L NaOH concentration, 80 degrees C leaching temperature, 4:1 liquid to solid ratio, and 180 minutes leaching time. The interface transfer and diffusion through the product layer or insoluble substance layer were the rate-controlling steps. The leaching kinetics equation was established, and the activation energy was 34.384 kJ/mol.
引用
收藏
页码：883 / 890
页数：8
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