Zinc recovery from steel-making wastes by acid pressure leaching and hematite precipitation

被引：70

作者：

Langova, Sarka ^{[1
]}

Matysek, Dalibor ^{[1
]}

机构：

[1] Tech Univ Ostrava, VSB, Ostrava, Czech Republic

来源：

HYDROMETALLURGY | 2010年 / 101卷 / 3-4期

关键词：

Zinc; Sulphuric acid; Steel-making wastes; Leaching; Hematite; Precipitation; FERRIC SULFATE;

D O I：

10.1016/j.hydromet.2010.01.003

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The hydrometallurgical extraction of zinc from EAF dust and steel-making sludge was studied. These materials were treated with sulphuric acid at elevated pressure using microwave heating. More than 92% of zinc can be leached out using 0.3 M acid solution at 260 degrees C. Fe(II) remained in solution while most of the Fe(III) was precipitated as hematite. The iron concentration in the leach liquor decreased markedly when hydrogen peroxide solution was added at the start of the experiment. In this case, zinc extraction reached almost 99%. The hydrolytic precipitation of ferric sulphate was investigated at 200 degrees C for a low iron concentration. The reaction was found to be first-order with respect to Fe(III), and the apparent rate constant was 0.01 min(-1). (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：171 / 173

页数：3

共 17 条

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