基于CFD的建筑陶瓷干法制备过程温度场分析

Analysis of the Temperature Field during Building Ceramic Dry Granulating Process Based on CFD

为了建立干法制粉过程温度场与有效坯体颗粒之间的关系。基于欧拉双流体理论建立干法制粉过程数理模型,模拟干法制粉过程温度随造粒时间的变化规律,同时结合坯料颗粒的流动性指数与有效颗粒数,阐明干法制粉过程温度场与有效坯体颗粒之间的关系。数值模拟与实验结果表明:当造粒时间为4 min、5 min、6 min时,造粒室内部最大温度值分别约为70℃、85℃、95℃,且造粒室内温度值均衡性依次减弱,坯料颗粒的流动性指数分别为59.5、91.5、85.5,有效坯料颗粒分别为85.33%、90.66%、87.76%。研究结果说明:造粒时间为5 min时造粒效果最佳,且当造粒室内温度值大于85℃时,坯料颗粒的流动性指数及有效颗粒数量在一定程度上均减少。

In order to establish the relationship between the temperature field and the effective ceramic body particles on the dry granulating process. Temperature field mathematical model was established by Eulerian two fluid theory, which simulated the variation of temperature field with granulation time, and the relationship between the temperature field of the dry process and the effective body particles was clarified by the flow index and the effective particle number. The simulation results and experimental data contrastively show that as the granulation time is 4 min, 5 min, 6 min, granulating room internal maximum temperature values are approximately 70 ℃, 85 ℃, 95 ℃and temperature value balance in turn weakens, ceramic body particles liquidity index are respectively 59. 5, 91. 5, 85. 5, effectiveceramic body particles are respectively 85. 3 3 % , 90. 6 6 % , 87. 7 6 % . The results show that thegranulation effect is the best when the granulation time is 5 min, and the flow index and the effectiveparticle number of the ceramic body were reduced to a certain extent when the temperature of thegranulation room is greater than 85 .