Numerical Simulation of the Dynamic Process of Micropowder during Jet Milling/Electrostatic Dispersion

作者：Yin Pengfei; Zhang Rong^*; Li Yinbing; Li Ning; Shen Duo; Hu Jianchang

来源：Rare Metal Materials and Engineering, 2014, 43(12): 3052-3057.

• micropowder
• movement rule
• jet milling
• electrostatic dispersion

Based on the fundamental principle of classical mechanics and hydromechanics, a particle-trajectory model was established to simulate transport process of particles in J/E chamber during the preparation of micropowder with a combination of jet milling and electrostatic dispersion techniques, and the law of kinetic of the particles during J/E process was revealed as well. When the charging voltage is 20 kV, the grain flows of micropowder present laminar flows of quasi-steady-state as the velocity of jet is low. With the increase of jet velocity, the distribution of particles transforms into dispersive state, and the dispersion enhances to a certain extent. While when the charging voltage increases to 60 kV, the dispersion of particles in the chamber is further improved, which presents a better evenly dispersed state. The simulation of flow dynamics of the particles shows that increasing the jet velocity and the charging voltage can improve the dispersiveness of the powder during the transport process in the J/E chamber, and the effect of the charging voltage is more substantial.

• 出版日期2014-12
• 单位西北工业大学