响应曲面法优化赤铁矿絮凝体浮选行为研究  

Optimization of Flotation Behavior of Hematite Flocs in Sodium Oleate System Using Response Surface Methodology

作　　者：张晋霞 牛福生 Zhang Jinxia;Niu Fusheng(College of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210

出　　处：《矿产综合利用》2021年第3期22-26,38,共6页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金资助项目(51874135);河北省自然科学基金资助项目(E2018209085);唐山市基础创新团队项目(19130207C)。

摘　　要：采用淀粉为絮凝剂对平均粒径为8μm的赤铁矿纯矿物进行絮凝,形成平均粒径36.17μm、絮凝体密度2.89 g/cm^(3)、絮凝体孔隙率49.12%、分形维数为1.90的絮凝体。根据Box-Behnken实验设计原理,采用响应曲面法建立pH值、捕收剂油酸钠用量、搅拌转速及三者之间交互作用对赤铁矿絮凝体回收率影响的多元回归方程,对实验结果进行了ANOVA分析。在矿浆pH为7.76,油酸钠用量为132.22 mg/L,搅拌转速为1844 r/min,此条件下模型预测絮凝体回收率达到93.65%。通过赤铁矿浮选条件探究,得出其对絮凝体浮选的作用规律,为指导实践生产应用提供理论支撑。The graft copolymers with high selectivity were synthesized by using self-made starch and acrylamide as raw materials.The hematite pure minerals with an average particle size of 8μm were flocculated to form a floc with an average particle size of 36.17μm,floc density of 2.89 g/cm^(3),floc porosity of 49.12% and fractal dimension of 1.90.According to the design principle of Box-Behnken,Response Surface Methodology was adopted to establish the multiple regression equation,which indicated the effect of pH,sodium oleate dosage,stirring speed and the interactions between the three on the hematite floc recovery.In addition,the test results were analyzed and demonst rat ed by ANOVA.Under the conditions that the slurry pH is 7.76,the amount of sodium oleate is 132.22 mg/L,and the stirring speed is 1844 r/min,the model predicts that the floc recovery rate will reach 93.65% .By exploring the flotation conditions of hematite,the law of its effect on floc flotation is obtained,which provides theoretical support for guiding practical production applications.

关 键 词：赤铁矿 絮凝体 油酸钠 浮选 响应曲面法 

分 类 号：TD91[矿业工程—选矿]