Passivation of chalcopyrite during its chemical leaching with ferric ion at 68 °C

被引：106

作者：

Cordoba, E. M. ^{[2
]}

Munoz, J. A. ^{[1
]}

Blazquez, M. L. ^{[1
]}

Gonzalez, F. ^{[1
]}

Ballester, A. ^{[1
]}

机构：

[1] Univ Complutense Madrid, Fac Ciencias Quim, Dept Ciencia Mat & Ingn Met, E-28040 Madrid, Spain

[2] Univ Ind Santander, Fac Ingn Fis Quim, Escuela Ingn Met & Ciencia Mat, Bucaramanga, Colombia

来源：

MINERALS ENGINEERING | 2009年 / 22卷 / 03期

关键词：

Sulphide ores; Hydrometallurgy; Mineral processing; SULFATE-SOLUTIONS; ACIDIC-SOLUTIONS; OXIDATION; IRON; DISSOLUTION; CHLORIDE; KINETICS; SULFUR;

D O I：

10.1016/j.mineng.2008.07.004

中图分类号：

TQ [化学工业];

学科分类号：

081705 [工业催化];

摘要：

The passivation of chalcopyrite in the presence of ferric sulphate solutions was investigated at 68 degrees C. The effect of different variables (pulp density, pH and the presence of oxygen) on both the copper dissolution rate and the formation of solid compounds was studied. The leaching tests were carried out in stirred flasks at 180 rpm with 100 mL of a Fe3+/Fe2+ sulphate solution, varying the pulp density between 0.1 and 5% and the pH between 0.5 and 2.0 and both in aerobic and anaerobic conditions. Ferric ion seems to be responsible for the oxidation of chalcopyrite but also promotes its passivation. Ferrous ion plays a key role in the process by controlling the nucleation and precipitation of jarosites, which finally cause the passivation of chalcopyrite. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：229 / 235

页数：7

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