Study on the Performance of Ball Mill with Liner Structure based on DEM

Journal of Engineering and Technological Sciences

Yaokun Wang¹  Zhanfu Li² 

[1] School of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021;School of Mechanical and Automobile Engineering, Fujian University of Technology, Fuzhou, Fujian, 350118,

关键词: ball mill;    DEM;    height-width ratio;    rectangular lifter;    number of lifter;   

DOI  :  10.5614/j.eng.technol.sci.2018.50.2.2

学科分类：工程和技术（综合）

来源: Institute for Research and Community Services ITB

【 摘 要 】

This study used the discrete element method (DEM), which is effective and popular for solving the problem of granular systems simulating the motion of particles in a ball mill in different structural forms and at different rotational speeds. Firstly, simulations of five kinds of lifters (triangular, trapezoidal, rectangular, ladder and hemispherical) were set up. The results were as follows: when the rectangular lifter was selected as mill liner, the ball mill efficiency was significantly high. The breaking performance of the hemispherical lifter and the ladder lifter was poor, because the main pattern of motion was grinding rather than impact breakage. Secondly, the effects of the height–width ratio of the rectangular lifter, the height of the lifter and the number of lifters on the working efficiency of the ball mill were studied. It was found that a number of rectangular lifters of 12 and a height-width ratio of 3:1 produced the best results. The best height of the rectangular lifter was about 13 mm. Lastly, displacement, stress and deformation were analyzed using DEM coupled with a finite element method (FEM). The purpose was to design the geometrical lifter structure and to improve the performance of the ball mill.

【 授权许可】

CC BY