摘要
将实验室实验、工业试验与数值仿真(计算)方法相结合,以种分过程中的动力学规律和粒数衡算为基础,以MATLAB/Simulink软件为主要开发工具,根据种分过程的粒度变化特性,以MSMPR结晶器为对象,建立种分槽晶体成核、生长和附聚相结合的粒度衡算模型。根据不同温度下的实验数据,利用矩量法对种分过程的重要参数——附聚核β和成核速率RN进行求解。计算结果表明:附聚核在70℃左右达到最大值,成核速率则一直随着温度的升高而降低;用MATLAB/Simulink软件求解粒度模型,对不同工艺条件下种分过程的粒度分布进行预测,将预测结果与工业试验数据进行比较,相对误差低于10%。
The laboratory experiment, industrial test and numerical simulation of the precipitation were synchronously applied. Based on the dynamics law and population balance, with the full characteristics of the particle size variation of the MSMPR gibbsite precipitation process, the combined dynamic model of crystal＇s nucleation, growth and agglomeration was developed with MATLAB/Simulink to confirm the value of the important parameters ,8 and RN in different experimental conditions. The results show that β is maximal at about 70 ℃ and RN decreases with the increase of temperature. And the particle size distribution is predicted with the dynamic model. The relative error between the model＇s prediction and the experimental test data is less than 10%.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第4期879-883,共5页
Journal of Central South University:Science and Technology
基金
中国博士后基金资助项目(291054)
关键词
氧化铝
种分过程
粒度
模型
alumina
gibbsite precipitation process
particle
model
