The effect of tri-sodium citrate on the cementation of gold from ferric/thiourea solutions

被引：21

作者：

Wang, Zhike ^{[1
]}

Li, Yongfang ^{[1
]}

Ye, Cunling ^{[1
]}

机构：

[1] Henan Normal Univ, Henan Key Lab Environm Pollut Control, Key Lab Yellow River & Huai River Water Environm, Sch Chem & Environm Sci,Minist Educ, Xinxiang 453007, Peoples R China

来源：

HYDROMETALLURGY | 2011年 / 110卷 / 1-4期

关键词：

Gold; Cementation; Thiourea; Iron powder; Negative effect of Oxidant; THIOUREA SOLUTIONS; CHALCOPYRITE CONCENTRATE; CARBON ADSORPTION; REACTION-KINETICS; ACTIVATED CARBON; RECOVERY; CYANIDE; ACID; ORE; COPPER;

D O I：

10.1016/j.hydromet.2011.08.011

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The gold cementation by iron powder from thiourea solutions in the absence and presence of ferric ion was investigated. Ferric ion affects significantly the cementation reaction kinetics. The gold cementation without the presence of ferric ion obeys the first-order kinetics and is a diffusion controlled process. Ferric ion increases significantly the redox potential of the solutions, which results in the remarkable decrease of gold recovery. Tr-sodium citrate was used to overcome the negative effect of ferric ion on gold cementation reaction, which is attributed to its role of lowering the redox potential of the solutions with the formation of iron (III)-citrate complexes. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：128 / 132

页数：5

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