陶瓷墙地砖干法制粉造粒过程湿含量数值分析  

Numerical Analysis of the Ceramic Wall and Floor Tiles Dry Granulating Process for Moisture Content

作　　者：吴南星[1] 成飞[1] 余冬玲[1] 陈涛[1] 方长福[1] 廖达海[1] 

机构地区：[1]景德镇陶瓷大学机械电子工程学院,景德镇333403

出　　处：《人工晶体学报》2016年第10期2536-2541,2555,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51365018);江西省高等学校科技落地计划(KJLD14074);江西省科技支撑计划(20151BBE50041)

摘　　要：针对陶瓷墙地砖干法制粉过程粉体颗粒湿含量分布不均匀性问题。采用有限体积法建立干法制粉造粒过程欧拉-欧拉多相流模型,模拟干法造粒过程雾化液滴的分布情况,分析干法造粒过程中粉体颗粒的湿含量均匀性;同时搭建试验平台测试干法造粒粉体颗粒湿含量。数值仿真结果表明：当干法造粒时间为10 s、20 s、30 s时,粉体颗粒分布区域雾化液滴的质量比分布分别在0.08-0.09、0.09-0.1、0.11-0.12区域,且20 s时造粒室内雾化液滴分布均匀性均最佳。同时实验与仿真对比表明：当干法造粒时间为10 s、20 s、30 s时,造粒室内雾化液滴最大质量比实验测得值为0.086、0.112、0.123,数值模拟值为0.09、0.1、0.12;造粒室内雾化液滴平均质量比实验测得值为0.081、0.102、0.109,数值模拟结果为0.082、0.096、0.118。从局部与整体角度表明数值模拟与实验结果基于吻合,说明数值模拟结果的真实性,为陶瓷墙地砖干法制粉粉体颗粒湿含量均匀性分析提供了可靠的理论依据。According to heterogeneity problem of powder particles moisture content distribution on the ceramic wall and floor tiles dry granulating process. In order to simulate the distribution of atomized droplets, and analyze the moisture content uniformity of the powder particles in the dry granulating process, the finite volume method was used to establish the Eulerian-Eulerian multiphase flow model in the dry granulating process; besides, the test platform was set up to test the moisture content of the powder particles in the dry granulation. Numerical simulation results showed that when the dry granulating time was 10 s, 20 s and 30 s, the mass ratio distribution of the atomized droplets was respectively located in the range of 0. 08-0. 09, 0. 09-0. 1 and 0. 11-0. 12 in the regions of powder particle distribution, and when the granulating time was 20 seconds, the distribution uniformity of the atomized droplets was the best. At the same time, by comparing the results of experiment and simulation, when dry granulating time was 10 s, 20 s and 30 s, the atomized droplet mass ratio of the measured maximum value was 0. 086, 0. 112 and 0. 123 in granulating chamber, the numerical simulation value was 0. 09, 0. 1 and 0. 12; the atomized droplet mass ratio of the measured average value was 0. 081, 0. 102 and 0. 109 in the granulating chamber, and the numerical simulation value was 0. 082, 0. 096 and 0. 118. From the local and global point of view, the numerical value is consistent with the experimental value, which shows the validity of the numerical simulation results, it provides a reliable theoretical basis for the analysis of the uniformity of moisture content in dry granulating technology of ceramic wall and floor tiles.

关 键 词：陶瓷墙地砖 干法制粉 湿含量 欧拉-欧拉多相流模型 

分 类 号：TQ174.5[化学工程—陶瓷工业]