Abstract：In order to study the influence of structural parameters of semi-autogenous mill liner on grinding performance, the dynamic analysis of load particles in each region of semiautogenous mill was carried out. The mathematical model of the useful power of semi-autogenous mill based on the parameters of liner was established, and the influence of number, height and width of the liner on crushing performance was analyzed. The numerical simulation of grinding process of semi-autogenous mill was carried out using discrete element software EDEM and its two development. The influence of structural parameters of liner on the number of broken bond of bonded particle (material) was analyzed. The results show that the grinding performance is the best when the number of liner is 32, the height is 17 mm and the width is 20 mm, which is consistent with the analysis conclusion of the mode. The reliability of useful power of the semi-autogenous mill and the accuracy of the optimum liner structure parameters are further verified by experiments

Keywords：semi-autogenous mill; lining structure; grinding performance; numerical simulation