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针对高碱度高氧化铝含氧化钠的CaO-Al_2O_3-SiO_2-TiO_2-MgO-Na_2O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(SiO_2)],MgO,TiO_2,Al_2O_3及Na_2O对炉渣粘度的影响.结果表明,回归方程拟合的关联系数RC_2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,Al_2O_3,Na_2O含量的增加而逐渐降低,随着TiO_2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%、Al_2O_3大于20%、TiO2在3.1%~6.1%、Na_2O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.
Aiming at the high basicity, high alumina and sodium oxide-containing CaO-Al_2O_3-SiO_2-TiO_2-MgO-Na_2O hexavalent slag system, the experiment was designed with the limited uniform mixing design method. The slag was measured under the condition of 1773K temperature reduction The regression equations of slag composition and viscosity were established by regression analysis of partial least squares method, and the basicity [w (CaO) / w (SiO 2)], MgO, TiO 2, Al 2 O 3 and Na 2 O On the viscosity of the slag.The results showed that the correlation coefficient RC_2 of regression equation fitting was 0.9945 and the equation could predict the viscosity of the slag well.The viscosity of slag increased with the increase of alkalinity When the basicity of slag is less than 3.1, the content of MgO is more than 4%, the content of Al_2O_3 is more than 20%, the content of TiO_2 is 3.1%, and the viscosity of slag decreases with the increase of MgO, Al_2O_3 and Na_2O contents, ~ 6.1%, Na 2 O is more than 0.75%, the viscosity of slag at 1773K temperature is less than 2Pa × s, slag viscosity at this time completely meet the actual smelting requirements.