王长龙,王爽,乔春雨,倪文,徐承焱,仇夏杰,平硕

• 1:北京科技大学土木与环境工程学院金属矿山高效开采与安全教育部重点实验室
• 2:河北工程大学土木工程学院

摘要(Abstract)：

以含铁14.51%(质量分数)的铁尾矿为研究对象,采用煤基深度还原—磁选方法回收铁,研究并分析了焙烧过程中不同煤还原剂、助熔剂、焙烧温度以及焙烧时间对铁还原的影响规律。结果表明:对于铁尾矿深度还原,固定碳含量高且含有少量挥发份的煤效果较好;以无烟煤为还原剂,CaO为助熔剂,1300℃焙烧180 min,磁选得到铁产品中铁品位90.12%,铁回收率为72.21%。通过X射线衍射(XRD)、扫描电镜(SEM)及能谱分析(EDS)分析了磁选铁产品中铁的存在形式,结果表明:铁尾矿深度还原过程中铁矿物大部分被还原成金属铁,仅有少部分矿物是金属铁被氧化的磁铁矿和石英,实现了铁尾矿中铁的还原和富集。

关键词(KeyWords)： 铁尾矿;深度还原;无烟煤;铁

Abstract:

Keywords:

基金项目(Foundation): 国家高技术研究发展计划(“863”计划)资助项目(2012AA062405)

作者(Author): 王长龙,王爽,乔春雨,倪文,徐承焱,仇夏杰,平硕

DOI: 10.13289/j.issn.1009-6264.2014.09.004

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