基于FEM、CFD和DEM耦合的三产品磁选柱磁选过程模拟  

Simulation of Three Product Magnetic Separation Column Process Simulation Based on FEM,CFD and DEM Coupling

作　　者：吴俊杰 岳翔 郭小飞 代淑娟 张洺睿 任伟杰 WU Junjie;YUE Xiang;GUO Xiaofei;DAI Shujuan;ZHANG Mingrui;REN Weijie(School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China;Fushun Hanwang Aoniu Mining Co.,Ltd.,Fushun 113000,China;BCEG Resources Recycling Co.,Ltd.,Beijing 100080,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051 [2]抚顺罕王傲牛矿业股份有限公司,辽宁抚顺113000 [3]北京建工资源循环利用有限公司,北京100080

出　　处：《金属矿山》2024年第2期225-231,共7页Metal Mine

基　　金：辽宁省“兴辽英才计划”项目(编号:XLYC20020208);辽宁省教育厅项目(编号:JYT2D2023097);辽宁省教育厅服务地方项目(编号:2020FWDF12)。

摘　　要：为探明磁铁矿颗粒在三产品磁选柱中的运动规律和影响因素,采用FEM、CFD和DEM耦合的方法对其磁选过程进行模拟,并通过实际分选试验进行验证。基于磁铁矿粒度分布、矿物组成、磁化特性和力学特性,建立了磁铁矿重叠球体颗粒模型,采用ANSYS有限元软件模拟三产品磁选柱的磁场分布,采用Fluent软件模拟三产品磁选柱的流场分布,采用EDEM-API技术在离散元软件EDEM中实现矿石颗粒、磁场和流场的耦合,模拟三产品磁选柱的磁感应强度、励磁周期以及上升水流速对分选过程的影响。在给矿TFe品位为61.42%的情况下,模拟试验得到的精矿、中矿和尾矿的TFe品位分别为63.60%、58.44%和29.63%。采用?159型三产品磁选柱在与模拟条件相同的情况下进行分选试验。结果表明,精矿、中矿和尾矿的TFe品位分别为65.55%、42.58%和24.23%,模拟试验与实际试验的相对误差在3%以内。In order to find out the movement law and influencing factors of magnetite particles in the three-product mag-netic separation column,the magnetic separation process was simulated by FEM,CFD and DEM coupling method,and verified by the actual separation test.Based on the particle size distribution,mineral composition,magnetization characteristics and me-chanical properties of magnetite,the overlapping sphere particle model of magnetite was established.ANSYS software was used to simulate the magnetic field distribution of three-product magnetic separation column.Fluent software was used to simulate the flow field distribution of the three-product magnetic separation column.EDEM-API was used to realize the coupling of ore particles,pulsating magnetic field and flow field in the discrete element software EDEM.The effects of magnetic induction in-tensity,excitation period and rising water flow rate of the three-product magnetic separation column on the separation process were simulated.When the TFe grade of the ore is 61.42%,the TFe grades of the concentrate,the middle ore and the tailings obtained by the simulation test are 63.60%,58.44%and 29.63%,respectively.The separation test was carried out by usingϕ159 three-product magnetic separation column under the same simulation conditions.The results show that the TFe grade of concentrate,middle ore and tailings is 65.55%,42.58%and 24.23%respectively,and the relative error between the simula-tion test and the actual test is less than 3%.

关 键 词：三产品磁选柱 磁铁矿颗粒模型 动态磁场 流场 单向耦合 

分 类 号：TD924[矿业工程—选矿]