Magnetic Field Simulation and Experimental Tests of Special Cross-Sectional Shape Matrices for High Gradient Magnetic Separation
Magnetic Field Simulation and Experimental Tests of Special Cross-Sectional Shape Matrices for High Gradient Magnetic Separation
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DOI：
10.1109/tmag.2016.2635629
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发表时间：
2017-03
影响因子：
2.1
通讯作者：
Xiayu Zheng;Nana Guo;R. Cui;Dongfang Lu;Xudong Li;Mao-lin Li;Yu-hua Wang
中科院分区：
文献类型：
--
作者：
Xiayu Zheng;Nana Guo;R. Cui;Dongfang Lu;Xudong Li;Mao-lin Li;Yu-hua Wang
在高梯度磁分离中，磁性基体的截面形状对磁场特性有很大的影响。合适的断面基质可以提高细粒弱磁性矿物的回收率，降低选矿能耗。通过数值模拟和实验测试相结合的方法，研究了四种截面形状矩阵在高梯度磁悬浮轴向构型中的性能。利用ANSYS软件对两种基体产生的磁场进行了模拟，并对磁场强度、梯度和磁力进行了分析比较。模拟结果表明，随着磁感应强度的增加，菱形、椭圆形、方形和圆形钢基体依次达到磁化饱和，所需的磁感应强度分别约为0.7、0.8、1和1.1T。磁场梯度随着磁感应强度的增大而增大，当基体达到磁化饱和时，磁场梯度基本保持不变。在较宽的磁感应强度范围内，椭圆形和正方形阵列均表现出良好的磁场特性。磁场力在正方形表面附近最大，但下降很快，因此影响深度较小。椭圆形基体表面附近的磁力相对较低，但下降缓慢，且作用深度较大。菱形基体容易达到磁化饱和，磁力下降最快。制备了磁性基体，并进行了磁分离实验，验证了模拟结果.实验结果表明，在较宽的磁感应强度范围内，椭圆形和正方形基体都能获得较高的回收率，其中椭圆形基体的回收率最高。实验结果与数值模拟结果吻合较好，表明磁力作用深度是影响基体性能的重要因素。
The cross-sectional shape has great influence on the magnetic field characteristics of magnetic matrices in high gradient magnetic separation (HGMS). Suitable cross-sectional matrices can improve the recovery of fine weakly magnetic minerals and reduce mineral processing energy consumption. The performance of four types of cross-sectional shape matrices in the axial configuration of HGMS was studied through numerical simulation combined with experimental tests. The magnetic field generated by the matrices was simulated with ANSYS software, and the magnetic field strength, gradient, and magnetic force were analyzed and compared. The simulation results showed that diamond shaped, elliptical, square, and circular steel matrices reach magnetization saturation successively with increasing the magnetic induction, and the required magnetic induction is approximately 0.7, 0.8, 1, and 1.1 T, respectively. The magnetic field gradient increases with increasing the magnetic induction and then keeps constant when the matrices reach magnetization saturation. Within a wide range of the magnetic induction, the elliptical and square matrices present good magnetic field characteristics. The magnetic force near the surface of the square matrices is the largest but decreases rapidly and consequently has a small effect depth. The magnetic force near the surface of the elliptical matrices is relatively lower but decreases slowly and has a larger effect depth. The diamond-shaped matrices are easy to reach magnetization saturation, and the magnetic force decreases most rapidly. Magnetic matrices were manufactured, and magnetic separation experiments were conducted to verify the simulation results. The experimental results show that the elliptical and square matrices can obtain higher recovery in a wide range of magnetic induction, and the recovery of the elliptical matrices is the highest. The experimental results correspond well with the numerical simulation results, and the results indicate that the magnetic force effect depth is a very important factor influencing the performance of the matrices.