周期式高梯度磁选机线圈的计算机模拟分析

周期式高梯度磁选机所用磁介质激磁线圈长度与分选空间高度的关系对分选空间磁场强度的分布影响很大，合适的激磁线圈长度与分选空间高度的比例可以提高磁性矿物回收率、降低选矿能耗。采用ANSYS软件分析了长线圈、短线圈对分选空间磁场强度、磁场梯度、磁场力的影响，结果表明：长线圈所产生的磁场强度分布不均匀，短线圈所形成的磁场强度较均匀；当背景磁感应强度小于1.0 T时，长线圈产生的磁场梯度大于短线圈，当背景磁感应强度大于1.0 T时，两种线圈的磁场梯度都趋于稳定；背景磁感应强度相同时，长线圈产生的磁场力大于短线圈。长线圈产生的磁场有利于弱磁性矿物的选别，短线圈产生的磁场有利于非金属矿物的除杂。长线圈产生的磁场强度较强的区域集中在筒柱的中间位置以及距离分选空间较近的磁极头处；短线圈产生的磁场强度较强区域集中在筒柱与线圈交汇处，短线圈分选空间的磁场强度云图中磁场强度分布较均匀，与测得的磁感应强度变化趋势相一致。

Computer Simulation Analysis on Cycle Type High Gradient Magnetic Separator Coil

The relationship of the excitation coil of magnetic medium and the length of the separation space height of cy-cle type high gradient magnetic separator can greatly influence on the distribution of magnetic field intensity. The ratio of exci-tation coil length and height of the appropriate separation space can improve the recovery rate of magnetic minerals and reduce the energy consumption. The effect of long coil and short coil on the magnetic field strength,magnetic field gradient and mag-netic force in the separation space was analyzed using ANSYS software,The results indicated that magnetic field intensity is not uniformity in sorting space of long coil, magnetic field intensity is uniformity in sorting space of short coil. When the back-ground magnetic induction intensity is less than 1. 0 T,long coil magnetic field gradient is greater than the short coil magnetic field gradient,when the background magnetic induction intensity is greater than 1. 0 T,two kinds of coil magnetic field gradient will go stable. The background magnetic field intensity of the two coil is same,the magnetic force produced by long coil is grea-ter than the short coil. Magnetic field produced by long coil is beneficial for low intensity magnetic minerals separation, while for short coil is beneficial for impurities removal of non-metallic minerals. The strong area of magnetic field intensity produced by the long coil is concentrated in the middle position of the cylinder column and the magnetic pole head of the distance sepa-rating space;the strong magnetic field intensity region generated by the short coil is concentrated in the intersection of the cyl-inder and the coil,the magnetic field intensity strength of the magnetic field nephogram of short coil separation space substan-tially uniform,similar with the change trend of the measured magnetic induction intensity.