基于COMSOL Mutiphysics的履带式磁选机平面磁系磁场仿真与参数优化

来源期刊:中南大学学报(自然科学版)2021年第4期

论文作者:卢东方 程志勇 薛子兴 李旭东 褚浩然 刘剑军 刘振强 陈福林

文章页码:1049 - 1058

关键词:COMSOL Mutiphysics;永磁;挤压磁系;仿真;堵漏磁极

Key words:COMSOL Mutiphysics; permanent magnet; extrusion magnetic system; simulation; plugging magnetic pole

摘    要:为了优化履带式磁选机磁场特性,确定最佳磁系类型和结构参数。采用长×宽×高为100 mm×20 mm×10 mm的铷铁硼磁体,设计N-S极交替磁系、无堵漏挤压磁系和堵漏挤压磁系共3种平面磁系结构,采用COMSOL Multiphysics中的AC/DC接口,对这3种平面磁系进行模型构建、网格划分和仿真计算,在此基础上,通过改变磁体和导磁介质的几何尺寸,对堵漏挤压磁系的结构参数进行优化。研究结果表明:与N-S极交替磁系和无堵漏挤压磁系相比,堵漏挤压磁系能产生更强的表面磁感应强度和更大的磁场梯度,仿真结果与实测结果一致;采用长×宽×高为100 mm×30 mm×40 mm的铷铁硼磁体,长×宽×高为100 mm×5 mm×40 mm的导磁介质与长×宽×高为100 mm×10 mm×20 mm的堵漏磁极进行组合匹配时,可获得更高磁感应强度和磁场梯度的堵漏挤压磁系,研究结果可为履带式磁选机的优化设计提供理论依据。

Abstract: In order to optimize the magnetic field characteristics of the crawler magnetic separator, determine the best magnetic system type and geometric parameters, using 100 mm×20 mm×10 mm rubidium-iron-boron magnets, three planar magnetic system structures of N-S pole, i.e., alternating magnetic system, non-plugging extrusion magnetic system and plugging extrusion magnetic system, were designed.Using the AC/DC interface in COMSOL Multiphysics for modeling construction,meshing and simulation calculations of three planar magnetic systems, by changing the geometric parameters of the magnet and the magnetically permeable medium, the structural parameters of the plugging extrusion magnetic system were optimized. The results show that compared with the N-S pole alternating magnetic system and the non-plugging extrusion magnetic system, the plugging extrusion magnetic system can produce a stronger surface magnetic induction intensity and a larger magnetic field gradient. The simulation results are consistent with the measured results. When a 100 mm×30 mm×40 mm rubidium-iron-boron magnet and a 100 mm×5 mm×40 mm magnetically permeable medium are matched with 100 mm×10 mm×20 mm plugging magnetic poles, the plugging extrusion magnetic system with higher magnetic induction intensity and magnetic field gradient can be obtained. The results can provide theoretical basis for the optimal design of the tracked magnetic separator.

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