Discrete Research And Application Of Element Method In Large-scale Semi-autogenous Grinding Mill Simulation

Semi-Autogenous Grinding Mill (SAG Mill) is taken more and more attention since it uses ore itself as grinding medium instead of steel balls, which is also insensitive to chemical and electrochemical effects of the following flotation. It is said the produce efficiency of beneficiation process is impacted by SAG Mill so that it is of great meaning to research the kinetic theory of ore and steel balls in the SAG Mill and analyze its effective power.Discrete Element Method is introduced to do the medium kinetic research with08.8×4.8m large SAG Mill as the research object.This paper is based on the kinetic theory of ore and steel balls in the SAG Mill and theoretical research of power consumption. Kinetic simulation of ore and steel balls in the SAG Mill is done with the software of EDEM. Different working parameters are used in order to research the relationship between the parameters and power consumption as well as steel consumption. Orthogonal method is taken to design experimental plan while effective power of the SAG Mill, collision times between steel balls and SAG Mill and collision times between steel balls and ore are designed as optimal objectives. Model with9experimental points is simulated by EDEM and experimental data are disposed Range Method. The optimized parameters together with dynamic quantity of ore and steel balls are given through calculating the best filling ratio. It is of guiding significance for the practical product.