拜耳法赤泥深度还原提铁实验  

Deep reduction experiments of Bayer red mud for iron recovery

作　　者：贾岩[1,2] 倪文[1] 王中杰[1] 高术杰[1] 封金鹏[3] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]河北联合大学矿业工程学院,唐山063009 [3]广西大学资源与冶金学院,南宁530004

出　　处：《北京科技大学学报》2011年第9期1059-1064,共6页Journal of University of Science and Technology Beijing

摘　　要：针对国内某高铁拜耳赤泥的特点进行了深度还原--磁选实验,探讨了还原剂量、添加剂量、还原温度、还原时间、磨矿细度和磁场强度等不同影响因素对铁精矿品位和回收率的影响.通过化学多元素分析、X射线衍射分析、扫描电镜和能谱分析等方法,确定了原赤泥及所得铁精矿的物相组成和特点.在不采用添加剂时,所得铁精矿的品位为85.66%,回收率为91.86%;采用添加剂时,所得铁精矿的品位为91.23%,回收率为93.13%.Based on the characteristics of some Bayer red mud, deep reduction-magnetic separation experiments were done to study the effects of influencing factors such as reductant dosage, additive quantity, reduction temperature, reduction time, grinding fineness and magnetic field intensity on the grade of iron ore concentrate and the iron recovery rate. The phase compositions and char- acteristics of red mud and iron ore concentrate were determined by chemical analysis, X-ray diffraction （XRD）, scanning electron mi- croscopy （SEM） and energy dispersive spectroscopy （EDS）. It is shown that the grade of iron ore concentrate is 85.66% and the iron recovery rate is 91.86% without any additive. When the additive is used, the grade of iron ore concentrate is 91.23% and the iron recovery rate is 93.13%.

关 键 词：赤泥 炼铁 还原 磁选 固体废弃物 

分 类 号：TD951[矿业工程—选矿] TD924.1