炉渣组分对CaO-Al_2O_3-SiO_2-TiO_2-MgO-Na_2O渣系粘度的影响  

Effect of Composition on Viscosity of CaO-Al_2O_3-SiO_2-TiO_2-MgO-Na_2O System Slag

作　　者：佟志芳[1] 乔家龙 陈涛[2] 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000 [2]湖南冶金职业技术学院冶金与材料系,湖南株洲412006

出　　处：《过程工程学报》2016年第2期189-196,共8页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51174100);江西省自然科学基金资助项目(编号:2010GZC0058);江西省教育厅资助项目(编号:GJJ10474)

摘　　要：针对高碱度高氧化铝含氧化钠的CaO-Al2O3-SiO2-TiO2-MgO-Na2O六元渣系,采用有限制的混料均匀设计方法设计实验,在1773K温度熔融还原条件下测定了该渣系的粘度.利用偏最小二乘法回归分析,建立了炉渣组分与粘度的回归方程,利用回归方程分析了炉渣碱度[w（CaO）/w（SiO2）],MgO,TiO2,Al2O3及Na2O对炉渣粘度的影响.结果表明,回归方程拟合的关联系数RC2为0.9945,方程可很好地预测该渣系的粘度.在实验范围内,炉渣粘度随碱度的增加而增加.碱度一定时,炉渣粘度随MgO,Al2O3,Na2O含量的增加而逐渐降低,随着TiO2的增加先降低后增加.当炉渣碱度小于3.1、MgO质量含量大于4%、Al2O3大于20%、TiO2在3.1%～6.1%、Na2O大于0.75%时,1773K温度下炉渣粘度均小于2Pa×s,此时渣系粘度完全满足实际冶炼要求.The viscosity of CaO-Al2O3-SiO2-TiO2-Mg O-Na2O system slag was measured at 1 773 K under the molten reduction condition by the restricted mixture uniform design method. The regression equation between slag composition and viscosity was established using the partial least squares regression analysis. The effects of basicity（CaO/SiO2）, MgO, TiO2, Al2O3 and Na2O on the viscosity of slag were analyzed by the regression equation with relevant phase diagrams, literature and XRD phase analysis method. The results indicate that the correlation coefficient RC2 fitting to the regression model is 0.9945, indicating good agreement of the experimental data with the regression model, which can predict well the viscosity of slag. In the experimental composition ranges, the viscosity increase with increasing of basicity [w（Ca O）/w（SiO2）]. When the basicity is fixed, the viscosity decreases with increasing of the contents of Mg O, Al2O3 and Na2O. With increasing of TiO2 content, the viscosity first increases and then decreases. When the basicity of slag is less than 3.1, the mass fraction of Mg O more than 4%, that of Al2O3 more than 20%, that of TiO2 in 3.1%～6.1%, that of Na2O more than 0.75%, the viscosity of slag is less than 2Pa×s at 1 773 K, which fully meets the requirements of actual industrial operation.

关 键 词：CaO-Al2O3-SiO2-TiO2-MgO-Na2O渣系 组成 粘度 回归方程 熔融还原 

分 类 号：TF524[冶金工程—钢铁冶金]