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### 基于立磨选粉机颗粒分级过程的数学建模研究

1. 西安建筑科技大学材料科学与工程学院，陕西 西安 710055
• 收稿日期:2020-05-25 修回日期:2020-07-22 出版日期:2021-06-28 发布日期:2021-06-28
• 通讯作者: 陈延信 yx_ch@126.com
• 基金资助:
国家重点计划研发项目

### Research on mathematical modeling of particle classification process based on vertical mill separator

Penghao GENG,  Yanxin CHEN*,  Yanfei YAO,  Bo ZHAO,  Ding HAN

1. School of Material Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China
• Received:2020-05-25 Revised:2020-07-22 Online:2021-06-28 Published:2021-06-28
• Contact: CHEN Yan-xin yx_ch@126.com

Abstract: In this work, the experiment was carried out through the pilot test platform for vertical mill, and the change rule of the classification performance of the classifier under different system air volumes and classifier speeds were compared and analyzed. The cumulative distribution function of the normal distribution was used to correlate the operating parameters of the classifier with the collection probability of particles of different particle sizes. The test data of the system air volume and the speed change condition of the powder separator were used to fit the mean and variance in the model. A mathematical model can be established to quantitatively analyze the relationship between the system air volume, the speed of the separator and the particle classification efficiency. The fitted standard deviation of the verified regression was RMSE=0.0046, the deviation between the predicted value and the true value was small, and the coefficient of determination R-square=0.9863, which was close to 1, the model had higher credibility. Under the conditions of known system air volume and separator speed, the model prediction curve of the classification efficiency of the separator basically coincided with the test curve, and the model prediction effect was good.