Extraction of iron from copper-plant slag
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- 作者：A. A. Lykasov ; G. M. Ryss ; D. G. Sharafutdinov ; A. Yu. Pogodin
- 关键词：copper production ; sulfide ore ; production slag ; fayalite ; reduction of iron ; phase transformations ; iron extraction from slag ; reduction by gasified carbon products ; influence of temperature ; magnetic separation
- 刊名：Steel in Translation
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：46
- 期：9
- 页码：609-613
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Materials Science, general;
- 出版者：Allerton Press
- ISSN：1935-0988
- 卷排序：46
文摘
In the production of copper from sulfide ore, slag accumulates at the processing plant. In the present work, the phase transformations that occur in such slag during its reduction by the gasification products of carbon at 1100 and 1200°C are investigated. Experiments show that most of the iron present in such slag may be converted to metallic form by the gasification products of carbon in cupola furnaces at 1100°C. Subsequent increase in temperature to 1200°C improves the extraction of iron. In the indirect reduction of slag at temperatures above its melting point, metallic iron is mainly concentrated at the outer surface of the product, forming large inclusions that are easily extracted by magnetic separation. An expedient approach is to reduce laminar batch consisting of slag layers no thicker than 5 mm and interlayers of ground coal.