Abstract: Ball mill is one of the material crushing equipment. They are widely used in many industries, such as metallurgy, building materials, chemical engineering and mine industry. The motion morphology of grinding media plays a vital role in ball mills grinding efficiencies. Therefore, interests in liner design to ensure efficient mill operation has grown. Many liner structures have been designed and used in mill to have good motion morphology. However, the impact of regular polygon angle-spiral liner on mill performance is still unclear. To address this concern, impact factors of the grinding media motion morphology in different regular polygon angle-spiral liners are theoretically analyzed. Media motions of ball mill with regular polygon angle-spiral liner are numerical studied in EDEM software. The simulation results validate the theoretical analysis effectively. Results show that the regular quadrilateral angle-spiral liner with a 50° installing angle has the best grinding effect, which could provide the guidance of parameter selection of regular polygon angle-spiral liners and mill’s experimental study.

Key words: ball mill, motion morphology of grinding media, numerical analysis, regular polygon angle-spiral liner