Research Progress of Iron Recovery from Red Mud
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摘要:
赤泥是铝土矿生产氧化铝过程中产生的强碱性固体废渣，目前的堆存处理不但存在环境隐患，且未能对其中富含的金属资源进行利用。本文在概述赤泥的主要性质及处置现状基础上，针对其中含量最高的铁资源的回收技术进行详细介绍，从物理分选法、火法冶金和湿法冶金三方面对国内外最新的赤泥提铁技术进行综述，并对不同提铁方法的工艺路线和技术参数等进行说明及比较，评述了各种方法的优缺点及适用范围，并对各种方法的发展方向进行了展望。
Abstract:Red mud is a strong alkaline solid waste produced in the process of alumina production from bauxite. At present there are not only environmental hazards in the stacking treatment, but also the failure to utilize the rich metal resources. On the basis of summarizing the main properties and disposal status of red mud, this paper introduces the recovery technology of iron resource with the highest content in red mud in detail. The latest iron extraction technology of red mud at home and abroad are summarizes from three aspects of physical separation, pyrometallurgy and hydrometallurgy. And and compares the process routes and technical parameters of different iron extraction methods are explains. The advantages, disadvantages and application scope of each method are reviewed, The development direction of each method is prospected.
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Key words:
- red mud /
- iron concentrate /
- separation and recovery /
- magnetic separation /
- roasting /
- leaching
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