球磨工艺参数对纳米悬浮液分散效果的流场仿真研究及实验验证  

Flow Field Simulation of Ball-milling Impact towards Dispersion of Nano-suspension and Experimental Verification

作　　者：许瑞华[1,2] 黎向锋[1,2] 左敦稳[1] 王宏宇[3] 柳振平[1] 李建忠[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]江苏省精密与微细制造技术重点实验室,江苏南京210016 [3]江苏大学机械工程学院,江苏镇江212013

出　　处：《材料科学与工程学报》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)

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.

关 键 词：粉体分散 FLUENT 球磨流场仿真 磨腔内压强 

分 类 号：TB383[一般工业技术—材料科学与工程]