WU Nanxing, LIAO Dahai, XIAO Zhifeng

(School of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute,Jingdezhen 333403, Jiangxi, China)

Abstract: 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.

Key words: Eulerian two-fluid model; numerical simulation; full de-agglomeration; optimized design