陶瓷干法造粒机的数值模拟及其优化设计

Numerical Simulation and Optimized Design of Dry Granulator for Ceramic Materials

陶瓷行业干法造粒制粉取代原有的高能耗、高污染湿式球磨-喷雾造粒制粉是社会生产发展所趋。本文针对陶瓷干法造粒机颗粒充分分散性问题,采用CFD软件欧拉双流体模型建立三维数学模型。利用有限体积法求解不同主轴偏心率与筒体倾斜角的模型,模拟出颗粒的体积分布大小,同时分析颗粒的团聚现象。模拟结果表明,当偏心率为-0.3、倾斜角为150时,颗粒的分散性最佳。该模拟优化设计在一定程度上解决了干法造粒制粉颗粒的充分分散性问题,为陶瓷干法造粒机的研制具有一定的指导意义。

The substitution of dry granulation of the ceramic materials for high energy consumption,high pollution wet milling-spray drying granulation is an inevitable trend in ceramic industry.In order to realize full de-agglomeration in the process of dry granulation,3D mathematic models based on the Eulerian two-fluid model were developed using the commercial CFD software pack.The volume distribution and agglomeration of the granules are simulated by the models of the major axis eccentricity and the cylinder inclination angle generated via a finite volume route.Results show that when the eccentricity is-0.3 and the incline angle is 15°,the granules are best dispersed.The optimized design through numerical simulation has virtually realized the full de-agglomeration of the dry granulation.It will provide a theoretical basis for the development of a dry granulator for ceramic materials.