磁选柱阶段弱磁选磁场模拟及受力特性分析  

Magnetic Field Simulation and Force Characteristic Analysis of Low Intensity Magnetic Separation at the Stage of Magnetic Separation Column

作　　者：张洺睿 李明宇 孙雪妍 陈婉晴 ZHANG Mingrui;LI Mingyu;SUN Xueyan;CHEN Wanqing(Fushun Hanwang AoNiu Mining Co.,Ltd.,Fushun 113000,China;Professional Technology Innovation Center for Development and Utilization of Iron Ore Resources,Fushun 113000,China)

机构地区：[1]抚顺罕王傲牛矿业股份有限公司,辽宁抚顺113000 [2]辽宁省铁矿资源开发与利用专业技术创新中心,辽宁抚顺113000

出　　处：《金属矿山》2024年第5期276-285,共10页Metal Mine

摘　　要：为预先分离超纯铁精矿和合格尾矿,通过数值模拟对磁选柱阶段弱磁选磁场进行优化设计并进行分选研究,通过受力特性分析验证分选合理性。结果表明,中心磁感应强度模拟值与理论值、实测值误差分别为1.40%~0.29%、1.64%~0.09%。为精确分离精矿和混合中矿,精选磁场电流选取2 A,径向磁场力(HgradH)最大(最小)为3.11×10^(8)A^(2)/m^(3)(7.57×10^(7)A^(2)/m^(3))、轴向磁场力最大(最小)为3.19×10^(8)A^(2)/m^(3)(5.61×10^(8)A^(2)/m^(3))。为精确分离中矿及尾矿,恒定磁场及扫选磁场选取4 A、最小径向(轴向)磁场力分别为1.54×10^(9)A^(2)/m^(3)(1.44×10^(10)A^(2)/m^(3))、3.30×10^(8)A^(2)/m^(3)(1.39×10^(10)A^(2)/m^(3))。通过分析颗粒受力,确定分离精矿(TFe品位为70.09%)、中矿(TFe品位为63.23%)和尾矿(TFe品位为9.40%)所需径向(轴向)方向磁场力控制在1.87×10^(7)~3.13×10^(8)A^(2)/m^(3)(2.86×10^(8)~6.18×10^(8)A^(2)/m^(3))、3.13×10^(8)~3.33×10^(9)A^(2)/m^(3)(6.18×10^(8)~1.44×10^(10)A^(2)/m^(3))。优化后的磁选柱阶段弱磁选流程理论上达到磁铁矿单体、连生体、脉石同步分离的目的,有效提高了磁铁矿的分选效率,为磁铁矿石的高效分选提供新的技术途径。In order to separate ultra-pure iron concentrate and qualified tailings in advance,the low intensity magnetic separation field at the magnetic separation column stage was optimized and designed by numerical simulation and conduct a sorting study.The rationality of separation was verified by force characteristic analysis.The results showed that the errors between the simulated value and the theoretical and measured values are 1.40%~0.29%and 1.64%~0.09%,respectively.In order to ensure the accurate production of concentrate and mixed middling,the magnetic field current was selected as 2 A,and the maximum(minimum)radial magnetic field force(HgradH)was 3.11×10^(8)A^(2)/m^(3)(7.57×10^(7)A^(2)/m^(3)),the maximum(minimum)axial magnetic field force is 3.19×10^(8)A^(2)/m^(3)(5.61×10^(8)A^(2)/m^(3)).In order to ensure accurate separation of middling ore and tailings,4 A and minimum radial(axial)magnetic field forces were selected as constant magnetic field and sweep magnetic field,respectively 1.54×10^(9)A^(2)/m^(3)(1.44×10^(10)A^(2)/m^(3)),3.30×10^(8)A2/m^(3)(1.39×10^(10)A^(2)/m^(3)).By analyzing the force of particles,the radial(axial)magnetic field forces required for separation of concentrate(TFe grade is 70.09%),middling ore(TFe grade is 63.23%)and tailings(TFe grade is 9.40%)were determined to be controlled at 1.87×10^(7)~3.13×10^(8)A^(2)/m^(3)(2.86×10^(8)~6.18×10^(8)A^(2)/m^(3)),3.13×10^(8)~3.33×10^(9)A^(2)/m^(3)(6.18×10^(8)~1.44×10^(10)A^(2)/m^(3)).The optimized low intensity magnetic separation process in the magnetic column stage theoretically achieves the purpose of synchronous separation of magnetite monomer,connected body and gangue,effectively improves the separation efficiency of magnetite,and provides a new technical way for the efficient separation of magnetite ores.

关 键 词：磁铁矿 柱式精选 磁选柱 磁系 受力分析 

分 类 号：TD95[矿业工程—选矿]