Abstract:Semi-autogenous mill (SAG) has been widely used in the grinding process of some large mineral processing plant in recent years due to the advantages of short flow, easy operation and low cost. The grinding process of SAG shows a wide range of dynamic and fluid characteristics due to the complex interaction between minerals. It is costly and difficult to investigate the grinding process by industrial experiment, but the simulation method can analyze the movement characteristics of ore material visually, which is convenient to reveal and master the rules of grinding process. Discrete Element Method (DEM), Smoothed Particle Hydrodynamics (SPH) and Computational Fluid Dynamics (CFD) are widely used to study the grinding process of SAG. In this paper, the basic principles and model coupling process of the three simulation methods are introduced, and the applicability of different methods is compared and summarized. On this basis, the research progress of different models on the movement state of minerals and the wear and optimization of liners in the grinding process of SAG is reviewed, and the potential research direction in the future is considered.