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过程工程学报 ›› 2016, Vol. 16 ›› Issue (2): 189-196.DOI: 10.12034/j.issn.1009-606X.216021

• 流动与传递 • 上一篇    下一篇

炉渣组分对CaO-Al2O3-SiO2-TiO2-MgO-Na2O渣系粘度的影响

佟志芳 乔家龙 陈涛2   

  1. 江西理工大学材料与化学工程学院 江西理工大学材料与化学工程学院 湖南冶金职业技术学院冶金与材料系
  • 收稿日期:2016-03-24 修回日期:1900-01-01 出版日期:2016-04-20 发布日期:2016-12-22
  • 通讯作者: 佟志芳

Effect of Composition on Viscosity of CaO-Al2O3-SiO2-TiO2-MgO-Na2O System Slag

TONG Zhi-fang QIAO Jia-long CHEN Tao   

  1. School of Materials and Chemical Engineering, Jiangxi University of Science and Technology School of Materials and Chemical Engineering, Jiangxi University of Science and Technology Department of Metallurgical and Materials, Hunan Nonferrous Metals Vocational and Technical College
  • Received:2016-03-24 Revised:1900-01-01 Online:2016-04-20 Published:2016-12-22
  • Contact: TONG Zhi-fang

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被引次数

15

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1773 K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，1773 K温度下炉渣粘度均小于2 Pa×s，此时渣系粘度完全满足实际冶炼要求.

关键词: CaO-Al2O3-SiO2-TiO2-MgO-Na2O渣系, 组成, 粘度, 回归方程, 熔融还原

Abstract: The viscosity of CaO-Al2O3-SiO2-TiO2-MgO-Na2O system slag was measured at 1773 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(CaO)/w(SiO2)]. When the basicity is fixed, the viscosity decreases with increasing of the contents of MgO, 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 MgO 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 1773 K, which fully meets the requirements of actual industrial operation.

Key words: CaO-Al2O3-SiO2-TiO2-MgO-Na2O system slag, composition, viscosity, regression equation, molten reduction

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