某铁矿石干磨干选新技术研究  

Research on New Technology of Dry Grinding and Dry Separation of an Iron Ore

作　　者：王鹏 胡泽武 孙建新 刘贺民 王帅 朱海峰 WANG Peng;HU Zewu;SUN Jianxin;LIU Hemin;WANG Shuai;ZHU Haifeng(MCC Shenyang Qinhuangdao Engineering Design and Research Institute Co.,Ltd.;LOESCHE Grinding Machinery Manufacturing(Shanghai)Co.,Ltd.;Hebei Province Green Intelligent Mine Engineering Design Technology Innovation Center)

机构地区：[1]中冶沈勘秦皇岛工程设计研究总院有限公司,河北省秦皇岛市066003 [2]莱歇研磨机械制造(上海)有限公司 [3]河北省绿色智能矿山工程设计技术创新中心

出　　处：《现代矿业》2022年第9期102-106,共5页Modern Mining

摘　　要：内蒙古西部某铁矿为解决因缺水造成的选矿成本高、综合指标差等问题,在工艺矿物学研究的基础上提出了以辊式磨和多级颗粒分选机为核心设备的干磨干选新技术。该铁矿扩建项目工业试验结果表明:干磨干选新技术在磨矿过程中可分离出3种窄级别粒径矿石颗粒,分别经干式磁选抛尾,总抛尾率为11.5%,尾矿磁性铁品位低于1%,尾矿为合格建筑材料。铁矿粉干式磁选条件结果表明:铁矿粉细度为-0.074 mm71.31%时,干选效果较好;采用不同的粉矿磁选机干选,抛尾率为32.6%~44.56%,尾矿磁性铁品位与湿选差别不大,总抛尾率为40.35%~50.94%;铁矿粉干选尾矿为石粉,可用作建材、水泥原料、充填料等,也可干堆。铁矿石干磨干选新技术大幅提高了铁矿石的抛尾率,降低了选矿成本,具有广泛的适用性。In order to solve the problems of high beneficiation cost and poor comprehensive index caused by water shortage in an iron mine in Western Inner Mongolia,a new technology of dry grinding and dry separation with roller mill and multi-stage particle separator as the core equipment was proposed on the basis of process mineralogy research.The industrial test results of the iron ore expansion project show that the new technology of dry grinding and dry separation can separate three kinds of narrow grade particle size ore particles in the grinding process,and discard the tailings by dry magnetic separation respectively.The total discarding rate is 11.5%,the magnetic iron grade of tailings is less than 1%,and the tailings are qual⁃ified building materials.The results of dry magnetic separation conditions of iron ore powder show that when the fineness of iron ore powder is-0.074 mm account for 71.31%,the dry separation effect is better;the tailings discarding rate is 32.6%~44.56%by using different magnetic separators for dry separation.The magnetic iron grade of tailings is not much different from that of wet separation,and the total tailings dis⁃carding rate is 40.35%~50.94%.The dry tailings of iron ore powder are stone powder,which can be used as building materials,cement raw materials,filling materials,etc.,or dry stacking.The new technology of dry grinding and dry separation of iron ore greatly improves the tailings discarding rate of iron ore,reduces the cost of beneficiation,and has wide applicability.

关 键 词：铁矿石 辊式磨 干磨干选 抛尾 品位 

分 类 号：TD951[矿业工程—选矿]