Hiroshi Nogami

Abstract:

In this study, a mathematical model for the analysis of particle temperature in the rotary kiln was developed. In this model, the motion of the particle bed in the rotary kiln was simulated by the discrete element method. In this method, the trajectories of all particles were tracked simultaneously with taking into account the contact forces among particles and between the particle and the kiln wall. Additionally, the temperature variations of all the particles were also tracked. In the particle heat transfer model, the convective heat transfer between the high-temperature gas and the particles and the radiative heat transfer between the kiln wall and the particles were considered. The heat transfer mechanisms were switched according to the location of the particle in the bed. With this heat transfer model, the distribution of the particle temperature was successfully calculated. And the variation of the temperature distribution with the progress of the particle heating was revealed.