摘要
本文基于湿法球磨分散工艺,利用Fluent对纳米CeO2悬浮液的球磨过程进行仿真模拟,提出以球磨罐磨腔内压强作为其分散效果的评价指标,获得球磨转速、填充率以及球料比等工艺参数对磨腔内压强的影响规律。研究表明,球磨机转速在一定范围内变化时,其转速越大,磨球运动愈激烈,磨腔内压强越大;填充率由0变化为1时,磨腔内压强先增大后减小;球料比增大时,磨腔内压强逐渐增大至平稳。同时采用三因素三水平正交试验,通过沉降试验考察球磨工艺参数对纳米CeO2悬浮液分散效果的影响,验证了球磨仿真的正确性。
Based on wet ball-milling dispersion, simulation of the ball-milling process in the suspension was carried by using of Fluent. Influence law about the rotational speed of ball-milling, filling rate of the jar and ball-to-powder weight ratio were obtained from the chamber pressure which was used as the evaluation criterion of this study. The results indicate that within a certain rang of the rotation speed the pressure increases as the ball milling speed accretes, while it increases then decreases with the filling rate changing from 0 to 1. Furthermore, when the ball-to-powder weight ratio rises, the pressure grows up to a steady value. By analysis of powder dispersion rate, the results of simulation are in accordance with the phenomena of the orthogonal experiment with three factors and three levels.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2013年第5期737-742,共6页
Journal of Materials Science and Engineering
基金
航空科学基金资助项目(2010ZE52056)
江苏省精密与微细制造技术重点实验室基金
江苏省自然科学基金资助项目(BK2011479)
关键词
粉体分散
FLUENT
球磨流场仿真
磨腔内压强
powder dispersion
fluent
ball-milling flow field simulation
grinding cavity pressure
