综合碱度对连铸保护渣黏性特征的影响

利用旋转黏度计,全面研究连铸保护渣的黏度、凝固温度和黏性活化能与碱度、综合碱度之间的关系.在本实验渣系条件下,随着综合碱度的增大,连铸保护渣的黏度、凝固温度和黏性活化能均逐渐减小,并且随着综合碱度的增大,其对黏性特征的影响作用逐渐减弱.利用连铸保护渣的黏度、凝固温度和黏性活化能与综合碱度的回归方程,可以全面考察渣中各组元对连铸保护渣黏性特征的影响作用,精确预测连铸保护渣的黏性特征.当综合碱度为2.0时,连铸保护渣的黏度为0.17 Pa.s,凝固温度为1 030℃,黏性活化能为120 kJ.mol-1.综合国内外连铸保护渣应用实践,连铸保护渣的综合碱度应大于2.0,此时连铸保护渣的黏性特征保持相...

Effect of BI on Viscous Characteristics of Mold Powder

By rotating viscometer, the relationships among the viscosity, solidification temperature, activation energy of slags, R and BI are studied. Under the present experimental conditions, the viscosity, solidification temperature and activation energy of mold powder all decrease with increasing BI and, meanwhile, the effect of BI on viscous characteristics of mold powder gradually weakens. Using such regressive relationships, the effects of all components on viscous characteristics of mold powder are investigated to predict accurately the viscous characteristics of mold powder. The results show that when BI is 2.0, the viscosity, solidification temperature and activation energy of mold powder are 0.17 Pa · s, 1 030°C and 120 kj · mol^-1, respectively. As known, BI of mold powder should be over 2.0 to keep the stable viscous characteristics of mold powder.