Abstract: Dense medium cyclone is a widely used and high effective coal preparation equipment and the force on particle in dense medium cyclone is very complicated. Based on the research results of multiphase flow and discrete material, this paper analyzes the force on particle inside DMC. Based on the diffidence between radial and axial flow field distribution inside DMC, the radial and axial motion equation of the particle are analyzed and derived. This paper simulates motion tracks of particle inside dense medium cyclone by using Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM) coupled method.

Key words: dense medium cyclone, motion characteristics, Fluent, EDEM