Simulation analysis of internal flow field characteristics and structural strength of tower mill

Abstract

Tower mill is becoming frequently used for ultra-fine grinding in beneficiation industry, but the research on the internal flow field and structural strength are still poor. This makes process optimization and scale-up engineering application of such equipments problematic. Numerical simulation using CFD and fluid-solid coupling method was taken to know the internal flow field and structural strength. Fluid trajectories and distribution of velocity were got by using CFD method; Stress on the agitator were calculated using fluid-solid coupling method. The results show that the fluid spirals upwards and downwards; The effective grinding areas are at the cylindrical area of the end of the mixing blade; The maximum displacement of stirrer is located in the end of the mixing blade, and the stress is larger at the joint of mixing blade root and the stirring shaft. Strength design meets the requirements.