Catalytic effect of silver-bearing solid waste on chalcopyrite bioleaching: A kinetic study

被引：9

作者：

Liao, Rui ^{[1
,2
]}

Wang, Xing-xing ^{[1
,2
]}

Yang, Bao-jun ^{[1
,2
]}

Hong, Mao-xing ^{[1
,2
]}

Zhao, Hong-bo ^{[1
,2
]}

Wang, Jun ^{[1
,2
]}

Qiu, Guan-zhou ^{[1
,2
]}

机构：

[1] Cent South Univ, Minist Educ, Key Lab Biohydromet, Changsha 410083, Peoples R China

[2] Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2020年 / 27卷 / 05期

基金：

中国国家自然科学基金;

关键词：

chalcopyrite; silver-bearing solid waste; bioleaching; kinetics; DISSOLUTION PROCESS; ELECTROCHEMICAL DISSOLUTION; COMPREHENSIVE UTILIZATION; FERRIC ION; BORNITE; MECHANISM; CULTURE; PYRITE; ORES; XPS;

D O I：

10.1007/s11771-020-4375-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Silver ion can be useful in improving chalcopyrite bioleaching efficiency. In this work, leaching kinetics of this process was investigated using silver-bearing solid waste under different chalcopyrite/solid waste ratios. Bioleaching behavior indicates that silver-bearing solid waste can enhance the bioleaching process, and the redox potential is much higher than the proposed appropriate range (380-480 mV vs Ag/AgCl) with the solid waste added. There is a positive correlation between temperature and copper extraction rate. The kinetics data fit well with the shrinking-core model. Under these leaching conditions, the bioleaching of chalcopyrite is controlled by internal diffusion with calculated apparent activation energy (E-a) of 28.24 kJ/mol. This work is possible benificial to promote the industrial application of silver catalyst in leaching of chalcopyrite.

引用

页码：1395 / 1403

页数：9

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