贫赤铁矿石粗粒湿式强磁预选抛废试验  

Preconcentration of Coarse Lean Hematite Ore by Wet High-Intensity Magnetic Separation for Tailings Discard

作　　者：李佩昱 高鹏[1] 徐冬林 李艳军[1] 余建文[1] LI Pei-yu;CAO Peng;XU Dong-lin;LI Yan-jun;YU Jian-wen(School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China;Anqiart Mining Co Ltd, Anslian Iron and Steel Group, Anshan 114043, Liaoning, China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]鞍钢集团鞍千矿业责任有限公司,辽宁鞍山114043

出　　处：《矿冶工程》2019年第4期47-49,共3页Mining and Metallurgical Engineering

基　　金：“十二五”国家科技支撑计划项目(2015BAB15B02)

摘　　要：为实现鞍千极贫赤铁矿石的开发利用,对该铁矿石进行了粗粒湿式强磁预选试验研究,考察了磁场强度、立环转速、脉冲冲次等主要影响因素对预选指标的影响。结果表明,在给料TFe品位21.36%、细度-3 mm、磁场强度1.0 T、立环转速2.0 r/min及脉冲冲次200次/min的优化条件下,可得到预选精矿TFe品位34.18%、铁回收率89.20%、抛尾率43.28%、尾矿TFe品位5.33%的优异技术指标,为我国大量极贫赤铁矿石的高效预选提供了借鉴。Wet high-intensity magnetic preconcentration was introduced to treat coarse fraction of an ultra-lean hematite ore from Anqian Mine to actualize its utilization. The influences of magnetic field strength, vertical-ring rotating speed and pulsating frequency on processing index were investigated. The results showed that, adopting the optimized parameters such as magnetic field strength of 1.0 T, vertical-ring rotating speed of 2.0 r/min and pulsating frequency of 200 times/min, the concentrate assaying TFe grade of 34.18% with recovery of 89.20% was obtained from the preconcentration of the raw ore with feed TFe grade of 21.36% and feed size of-3 mm. By applying this procedure, the tailings with low TFe grade of 5.33% and high yield of 43.28% were discarded. This research provides a reference for efficient preconcentration of a good number of lean hematite mines in China.

关 键 词：赤铁矿 极贫赤铁矿 强磁选 预选 抛尾 

分 类 号：TD924[矿业工程—选矿]