难选鲕状赤铁矿深度还原-磁选实验研究  

Beneficiation of unwieldy oolitic hematite by deep reduction and magnetic separation process

作　　者：倪文[1] 贾岩[1] 徐承焱[1] 郑美娟[1] 王中杰[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《北京科技大学学报》2010年第3期287-291,共5页Journal of University of Science and Technology Beijing

摘　　要：针对国内某种难选鲕状赤铁矿的特点,进行了深度还原--磁选实验研究,探讨了还原温度、还原时间、二元碱度、磨矿细度和磁场强度等不同实验条件对渣铁分离效果和产品指标的影响.通过光学显微分析、X射线衍射分析、SEM和化学分析等手段确定了原矿与产品的物相组成与特点.在还原温度为1200℃、还原时间为2h及二元碱度为0.2的工艺条件下,获得了品位为91.94%、回收率为95.85%的铁精矿粉.分析表明,所得铁精粉的品位高,有害杂质少.Based on the characteristics of some unwieldy oolitic hematite,experimental studies were done by deep reduction and magnetic separation method.The effects of experimental conditions,such as reduction temperature,reduction time,binary basicity,grinding fineness,and magnetic field intensity on the separation efficiency and product indexes were analyzed.The phase composition and characteristics of run-of-the-mine and products were determined by comprehensive methods such as optical microscopy,X-ray diffraction,SEM and chemical analysis.The reduction temperature,reduction time and binary basicity are 1 200 ℃,2 h and 0.2,respectively.The results show that the grade and the recovery of the iron ore concentrate are 91.94% and 95.85%,respectively,indicating that the obtained product is of high quality and of less harmful impurities.

关 键 词：鲕状赤铁矿 炼铁 深度还原 磁选 

分 类 号：TD951[矿业工程—选矿] TF556[冶金工程—钢铁冶金]