关键词: 干法造粒;欧拉-欧拉双流体模型;粗糙度;粉体级配百分比;流动性指数

Abstract: the granulating chamber in the dry granulation process of ceramic wall and floor tile .Based on Eulerian-Eulerian two-fluid model to simulated the mixing process .At the same time, the roughness of the powder , the powder gradation and the powder flowability index were analyzed to verify the correctness of numerical simulation .Simulation results showed:When the speed of granulating speed is 120 RPM, 140 RPM, 160 RPM, the size distribution of the powder remained unchanged , the uniformity and dispersion of the powder were gradually improved , and reunion phenomenon gradually disappeared;When the speed of granulating speed is 180 RPM, 200 RPM, the size distribution of the powder still remained unchanged , the uniformity and dispersion of the powder were gradually reduced , and reunion phenomenon gradually appeared .The experimental results show that when the speed of granulating speed is 120 RPM, 140 RPM, 160 RPM, 180 RPM, 200 RPM, the average value of roughness coefficient is 1.79, 1.77, 1.68, 1.74, 1.78; The percentage of powder content is 73％, 77％, 89％, 80％, 72％;And the liquidity index is 63.54, 66.95, 69.75, 68.32, 67.21.Comprehensive analysis show: when the speed of granulating speed is 160 RPM, the powder has good uniformity and dispersion , and no obvious agglomeration phenomenon , at the same time , the average roughness coefficient of the blank powder is the smallest, the percentage of the powder gradation is the highest , and the fluidity index is the largest , granulation effect is the best .

Key words: dry granulation milling;eulerian-eulerian two-fluid model;roughness;percentage of powder;liquidity index