磁选柱中螺线管型磁系的模拟优化研究  

Simulation and Optimization of Solenoidal Magnetic System in Magnetic Separation Column

作　　者：张洺睿 郭小飞 任伟杰 代淑娟 ZHANG Mingrui;GUO Xiaofei;REN Weijie;DAI Shujuan(School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051

出　　处：《金属矿山》2021年第10期162-167,共6页Metal Mine

基　　金：辽宁省兴辽英才计划(编号:XLYC20020208);辽宁省教育厅服务地方项目(编号:2020FWDF12);辽宁科技大学院士专家工作站开放课题(编号:USTLYSG201802)。

摘　　要：针对磁选柱螺线管型磁系中心磁感应强度低和磁场梯度小等问题,利用理论计算和有限元仿真相结合的方法,对螺线管磁系长度与宽度的尺寸配比进行优化研究。理论计算结果表明,当螺线管磁系的线圈为570匝时,中心磁感应强度可达15.26 mT。仿真模拟结果表明,随着螺线管线圈长度b与宽度a比值增加,磁系中心磁感应强度的模拟值与理论计算值的误差为0.13%~1.95%。当b/a的值为1.40时,磁感应强度提高了2.93%、磁场梯度增大了16.29%。基于以上研究结果,将?75 mm实验室型磁选柱的螺线管磁系的总匝数确定为560匝(20层×28列)。对辽宁本溪地区细度为-0.074 mm占83.96%、TFe品位为29.63%的磁铁矿进行实验室阶段磁选试验,获得了TFe品位分别为69.31%、27.64%和5.21%的铁精矿、中矿和尾矿,3种产品的回收率分别为63.83%、28.81%和7.36%。采用优化磁系结构的磁选柱,既能够获得高品位的铁精矿,还能够抛除合格尾矿。研究结果为磁铁矿柱式精选设备磁系的优化提供了新的研究基础。In order to solve the problems of low central magnetic induction and magnetic field gradient of the solenoidal magnetic system,the ratioof length to width of the solenoidal magnetic system is optimized by combining theoretical calculation and finite element simulation.The results of theoretical calculations showed that the central magnetic induction of the solenoidal magnetic system can reach 15.26 mT.When the coil of the solenoidal magnetic system is 570 turns.The simulation results showed that the error between the simulated value and the theoretical value of magnetic induction intensity is0.13%~1.95%with the increasing of the ratio of length b to width a of the solenoid coil.When the value of b/a was 1.40,the magnetic induction intensity increased by 2.93%and the magnetic field gradient increased by 16.29%.Based on the above findings,the total number of turns of the solenoidal magnetic system of?75 mm laboratory type magnetic separation column was determined as 560 turns(20 layers×28 columns).The laboratory stage magnetic separation test was conducted on a magnetite ore with a fineness of-0.074 mm accounting for 83.96%and a TFe grade of 29.63%in Benxi areaof Liaoning Province.Iron ore concentrate,medium ore and tailings were obtained with TFe grade of 69.31%,27.64%and 5.21%,respectively.And the recovery of the above three products were 63.83%,28.81%and 7.36%,respectively.The magnetic separation column with optimized magnetic system structure can not only obtain high grade iron concentrate,but also remove qualified tailings.The study of this paper provides a new research basis for the optimization of magnetic system of magnetic column cleaning equipment.

关 键 词：磁选柱 螺旋管 磁系理论 计算有限元法模拟 

分 类 号：TD924[矿业工程—选矿]