中文摘要：

基于磁偶极子磁场分布理论计算强磁性矿粒在磁场中所受到的力,并采用Verlet速度算法对2个磁性矿粒相互作用和9个磁性矿粒相互作用的二维动态过程进行模拟。研究结果表明：磁偶极子力和黏性阻力是影响磁性矿粒团聚的主要因素,磁偶极子力是强磁性矿粒在磁选过程中受到的最主要的力;2个磁性矿粒相互作用的动态过程由外磁场的大小和方向决定,矿粒从初始位置到接触所用时间小于8.3 ms;9个矿粒相互作用的动态过程与初始位置（随机性）有关,矿粒从初始位置到结成磁链所用时间小于30 ms,磁性矿粒最终沿外磁场方向团聚成链状结构。

英文摘要：

Based on magnetic dipole magnetic field distributing theory, forces acting on ferromagnetic mineral particles in magnetic field were calculated. The Velocity Verlet algorithm was adopted to simulate the two-dimensional dynamic interaction of two magnetic particles and nine magnetic particles respectively. The results show that the magnetic interaction force and viscous drag are the primary factors affecting the agglomeration of magnetic particles and the magnetic dipole force is the main force acting on ferromagnetic mineral particles in magnetic separation process.Furthermore, the dynamic process of the interaction between two magnetic particles is determined by the strength and direction of the external magnetic field. The time it takes for the two magnetic mineral particles to meet each other from the initial position is less than 8.3 ms. Additionally, the dynamic process of the interaction of nine magnetic particles is affected by the initial position（randomly assigned） and the time for the nine particles to form magnetic chains from the initial position is less than 30 ms. Magnetic mineral particles eventually agglomerate into chain aggregate structure along the direction of external magnetic field.