CHEN Tao, LIU Yutao, HUA Yongbin, NING Xiang, XU Jiajie, LIAO Dahai
(School of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)

Abstract: In order to study the effect of the tilting rate of the granulation chamber on the granulation of the dry powder of building ceramics,a mathematical model for dry granulating was established based on Eulerian-Eulerian two-fluid model. It simulated the volume distribution of powder particles for different inclination rates of the granulation chamber. At the same time, the correctness of the simulation model was verified by the experimental analysis of the flow index of body particles. The simulation results showed, when the tilting rate of the granulation chamber was 5°, 15°, 25°, 35°, and 45°, the volume distribution of powder particles in granulation chamber was approximately 1/3, 2/5, 1/2, 1/2, and 1/2, and the maximum accumulation of powder particles in granulation chamber was approximately 0.6, 0.45, 0.42, 0.42,and 0.6; when the tilting rate of the granulation chamber was 25°, the distribution of the powder particles in the granulation chamber was the best. The experimental analysis showed, when the tilting rate of the granulation chamber was 5°, 15°, 25°, 35°, and 45°, the liquidity index of the ceramic body was respectively 61.11, 78.45, 93.06, 88.23, and 72.11. The results show that with the optimum tilt angle of the granulation chamber at 25°, the volume distribution of the powder particles was the largest, the bulk density was the smallest, the distribution uniformity was the best, and the fluidity of the ceramic body was the best.
Key words: dry granulating; Eulerian-Eulerian two-fluid model; inclination rate; volume distribution