响应曲面法优化微细粒赤铁矿絮凝搅拌条件

Optimization of Stirring Conditions in Fine-grained Hematie Flocculation with Response Surface Methodology

本文利用苛性淀粉作为絮凝剂,运用响应曲面法对微细粒赤铁矿絮凝过程搅拌条件进行优化研究。根据Box-Behnken试验设计原理,建立了搅拌速度、搅拌时间和轴向距离及三者间交互作用对絮凝体粒径的多元回归方程,对试验结果进行了ANOVA分析和论证。在搅拌速度为495 r/min,搅拌时间6.9 min,轴向距离为2.0 cm,此条件下模型预测絮凝体粒径35.20μm,验证试验所得絮凝体35.92μm,二者偏差较小,表明模型准确,优化方案可信。

In this study, caustic starch was used as flocculant, stirring conditions in fine-grained hematie flocculation was optimized using response surface methodology. According to the design principle of Box- Behnken,the multiple regression equation was established,which indicated the effect of stirring speed, stirring time and axial distance and the interactions between the three on the floc size, the test results were analyzed and demonstrated by ANOVA. When the stirring speed was 495r/min with 6.9 min stirring time and 2.0cm axial distance, the floc size was predicted by the model to reach at 35.201arn while the floc size was 35.92prn in verification test, which indicates that the model is accurate and the optimization scheme can be trusted.