Modeling and analysis on extruding force in pelleting process

Abstract

Purpose of the study was to provide a basis for reducing power dissipation, optimizing structural design and properly using the pellet mill in practice by force analysis in pelleting process. According to the analyses on the forming mechanism of the pellet mill and the researches on the working condition of the ring die, the maximum extruding height of the material and the maximum torque model were developed. Based on the models, the influences of the material properties and structure parameters on the torque were discussed. The research shows that the material properties have great effects on the energy consumption in pelletizing. It is favorable to use small roller and small length-diameter ratio of the die hole in certain range for lowering energy consumption. And larger pellet mill can increase production yield and reduce energy consumption. The results are significantly meaningful for reducing consumption of the pellet mill, and can provide reliable theoretical basis for some experiments.