辽宁某铁精矿提铁降硅磁筛试验研究  

Test Research on Iron Improvement and Silicon Reduction by Magnetic Field Screening Separator for an Iron Concentrate in Liaoning

作　　者：董栋[1,2,3] 张颖新 王二锋[1,2,3] DONG Dong;ZHANG Yingxin;WANG Erfeng(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS;National Engineering Center for Multipurpose Utilization of Non-metallic Mineral Resources;Key Laboratory for Polymetallic Ores'Evaluation and Utilization,MNR)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所 [2]国家非金属矿资源综合利用工程技术研究中心 [3]自然资源部多金属矿综合利用评价重点实验室

出　　处：《现代矿业》2022年第10期169-171,共3页Modern Mining

摘　　要：辽宁某铁矿石中的主要铁矿物是磁铁矿,次为镜铁矿;脉石矿物以石英为主,现场精矿铁品位65%左右,SiO_(2)含量超过8%,过高含量的SiO_(2)影响了产品的销售。为了在不改变流程主结构的情况下,高效、低成本解决此问题,以现场二次精为试样,采用磁筛分选—磁筛精矿筛分—中矿合并再磨—弱磁选—磁筛精选—磁筛精矿筛分—中矿合并的流程处理试样,得到了铁品位66.73%、回收率88.46%、二氧化硅含量5.67%的综合铁精矿,提铁降硅效果显著,达到预期的试验目标。The main iron mineral in an iron ore in Liaoning is magnetite,followed by specularite,and the main gangue mineral is quartz.The concentrate with iron grade about 65%and SiO_(2) content above 8%was obtained on site,which is difficult to be sold because of higher SiO_(2) content.In order to solve the problem efficiently and inexpensively without changing the main structure of the process,the on-site iron concentrate from the second stage magnetic separation was treated as test sample with the process of mag⁃netic field screening separation,screening of magnetic screen concentrate,regrinding of combinated medi⁃um ore,low intensity magnetic separation,magnetic field screening cleaning,screening of magnetic screen concentrate and combinating medium ore.In the end,comprehensive iron concentrate with TFe grade of 66.73%,rocovery rate of 88.46%and SiO_(2) content of 5.67%was obtained,indicating significantly effective for iron improvement and silicon reduction and achieving prospective experimental target.

关 键 词：铁精矿 提铁降硅 磁场筛选机 

分 类 号：TD924[矿业工程—选矿] TD951