摘要：为了探究矿物颗粒形状对球磨机研磨作业的影响机制,运用离散单元法,采用球体和由球形颗粒凝聚而成的正四面体、平行六面体矿物颗粒模型,数值模拟球磨机的磨矿过程,分析矿物颗粒形状对运动形式、碰撞形式以及球磨机磨矿性能的影响。结果表明,矿物颗粒形状对球磨机磨矿性能的影响很大,相同条件下,球形矿粒碰撞能最大,正四面体矿粒次之,平行六面体矿粒最小。

关键词：离散单元法；颗粒形状；球磨机；磨矿性能

Abstract：To investigate the influencing mechanism of mineral particle shape on ball mill grinding operation,based on discrete element method,the grinding process in ball mill was simulated by the mineral particle model of sphere as well as regular tetrahedron and parallelepiped condensed by spherical particles.The effect of mineral particle shape on movement types,collision forms and grinding efficiency was analysed.The results show that mineral particle shape has a great influence on grinding in ball mill.Under the same conditions,the collision energy of spherical particles is maximal,the second is regular tetragonal particles,the third is parallelepiped particles.

Keywords：discrete element method;mineral particles shape;ball mill;grinding performance