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.　©,　2015,　Zhongnan　Daxue　Xuebao　(Ziran　Kexue　Ban)/Journal　of　Central　South　University　(Science　and　Technology).　All　right　reserved.