Abstract：Considering the mineral irregular shape, mineral inside different components and mechanical properties among different components, a multi-scale irregular shape cohesive particle model was built with discrete element numerical analysis method, the discrete element software EDEM and its secondary-development.Using the particle model, the energy consumption characteristics of shear extrusion crushing process in crusher were analyzed. The results show that the crushing energy is closely related to the loading mode of shearing extrusion crusher. When the inner cone's vibration frequency is constant, the crushing energy is larger with the outer cone's rotational speed becoming faster. When the outer cone's rotational speed is constant, the crushing energy is larger with the inner cone's vibration frequency becoming higher.The more minerals are broken, the greater the crushing energy is, and the greater the mineral crushing rate is, the faster the crushing energy grows. While the mineral crushing rate is reduced, the crushing energy decreases.

Keywords: discrete element; mineral crushing; secondary development; particle model; crushing energy