宣龙式铁矿焙烧还原-磁选工艺及其影响因素  

Roasting reduction-magnetic separation technology of Xuanlong-type iron ore and its relevant influencing factors

作　　者：李克庆[1] 王立宁[1] 倪文[1] 朱明[1] 刘保顺[1] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《北京科技大学学报》2011年第2期153-156,共4页Journal of University of Science and Technology Beijing

基　　金：'十一五'国家科技支撑计划资助项目(No.2008BAB34B01)

摘　　要：基于煤基焙烧还原-磁选工艺,进行了宣龙式难选鲕状赤铁矿石提铁过程及其影响因素的实验研究.以铁精矿品位和铁回收率为评价指标,确定了适合于该类矿石的最佳工艺条件:焙烧还原温度为1 200℃,还原剂用量为30%,焙烧还原时间为60min,焙烧产物磁选前的磨矿细度为-45μm占96.19%,磁选的磁场强度为111kA.m-1.在该工艺条件下,可以使铁精矿品位达到92.53%,铁回收率达到90.78%.Coal-based roasting reduction-magnetic separation technology for iron extraction from Xuanlong-type iron ores and its relevant influencing factors were investigated. An optimal technological condition for iron extraction from the iron ores was determined with iron concentrate grade and iron recovery rate as evaluation indices. The results show that the iron concentrate grade of 92.53% and the iron recovery rate of 90. 78% can be obtained when the reductant dosage is 30% , the roasting temperature is 1 200 ℃, the reduction time is 60 min, the percentage of roasting products with a grinding fineness of -45 μm is 96. 19% , and the magnetic field intensity is 111 kA·m^-1.

关 键 词：铁矿石 选矿 赤铁矿 焙烧 还原 磁选 

分 类 号：TF533.1[冶金工程—钢铁冶金]