响应曲面法优化菱镁矿反浮选脱硅的研究  

Research of Optimization of Reverse Flotation Desilication Process of Magnesite by Response Surface Method

作　　者：李苗苗[1,2] 殷志祥[1] 李彩霞[3] Li Miaomiao;Yin Zhixiang;Li Caixia(The College of Civil Engineering and Transportation,Liaoning Technical University,Fuxin,Liaoning 123000;The Department of Highway and Construction Engineering,Fuxin Higher Training College,Fuxin,Liaoning 123000;The College of Mining Engineering,Liaoning Technical University,Fuxin,Liaoning 123000)

机构地区：[1]辽宁工程技术大学土木与交通学院,辽宁阜新123000 [2]阜新高等专科学校公路与建筑工程系,辽宁阜新123000 [3]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《非金属矿》2018年第4期69-72,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51374119)

摘　　要：以辽宁省大石桥高硅型菱镁矿为研究对象,采用Box-Behnken响应曲面法进行试验设计并优化菱镁矿的浮选工艺条件。根据试验结果,利用Design-Expert软件分析计算试验数据,建立二次多项式回归方程,求解得出最佳条件为:磨矿细度-200目(-0.074 mm)占72.3%,矿浆pH值为8.8,水玻璃用量为82 g/t,十二胺用量为292 g/t。计算出的脱硅率为79.91%,与试验平均值79.76%接近,说明模拟结果可信。脱硅率影响因素依次为十二胺用量、磨矿细度、pH值和水玻璃用量,并且各因素间相互作用对脱硅效果产生影响。扫描电镜(SEM)和能谱(EDS)分析表明,该工艺条件可以降低菱镁矿表面的硅质矿物的黏附。研究成果对于菱镁矿降硅的工业生产过程具有一定参考意义。This paper selected high silicon magnesite in Dashiqiao, Liaoning as the research object, and Box-Behnken response surface method was adopted to earry out the magnesite flotation process. The experimental data was analyzed and calculated via Design-Expert software, the quadratie polynomial regression equation was built, and the optimum conditions were obtained as follows： the grinding fineness of 200 meshes accounts for 72.3%, pH value of the ore pulp is 8.8, the water glass dosage is 82 g/t, the dodeeylamine dosage is 292 g/t, and the calculated desilication rate is 79.91%, which is close to the average value of 79.76% in the experiment. In the order of size of influence, factors affecting desilication rate are do- decylamine dosage, grinding fineness, pH value and water glass dosage, and the interaction between the factors has a certain effect on desilication rate. The scanning electron microscopy and EDS speetroscopyshowed that this process can reduce the adhesion of siliceous minerals on the surface of magnesite. The research and application of this method can provide a certain reference significance for the industrial production process of silicon reduction in magnesite.

关 键 词：菱镁矿 反浮选工艺 响应曲面法 脱硅优化 

分 类 号：TD973.7[矿业工程—选矿]