The influence of TiO₂, binary basicity and Al₂O₃/TiO₂ ratio on the heat capacity, enthalpy and slag fluidity of CaO–SiO₂–MgO–Al₂O₃–TiO₂-based slag at 1693 K, 1723 K, and 1753 K (1420°C, 1450°C, and 1480°C) was investigated in this work. From the calculation results, it was found that the heat capacity of the slag increased with the increasing of TiO₂ content and the Al₂O₃/TiO₂ ratio and with the decreasing of basicity in the experimental temperature range. Enthalpy change increased with the increasing Al₂O₃/TiO₂ ratio and the decreasing of TiO₂ content. With the increasing of basicity, the slag temperature rises slightly and the viscosity decreases along with it. Additionally, the larger the basicity, the smaller the viscosity fluctuation under heat decrement. Therefore, a proper increase in basicity contributes to reduce viscosity fluctuation, for the current slag system, the appropriate basicity should be 1.15–1.20. Besides, the fluctuation of the temperature reaches a small value around the Al₂O₃/TiO₂ ratio is 0.6, and in metallurgical production, the heat input should be adjusted in time according to titanium content charge fluctuations, thus ensuring good fluidity and an adequate reaction between the slag and metal. The above experimental results can provide a reference for ironmaking enterprises using more vanadium–titanium magnetite ore.

TiO ₂，二元碱度和Al ₂ O ₃ / TiO _2的比率对1693 K，1723 K时CaO-SiO ₂ -MgO-Al ₂ O ₃ -TiO ₂基渣的热容量，焓和炉渣流动性的影响在这项工作中研究了1753 K（1420°C，1450°C和1480°C）。由计算结果可知，在实验温度范围内，炉渣的热容随着TiO ₂含量和Al ₂ O ₃ / TiO ₂比的增加以及碱度的降低而增加。焓变随Al _2的增加而增加O ₃ / TiO ₂比和TiO ₂含量的降低。随着碱度的提高，炉渣温度略有升高，粘度随之降低。另外，碱度越大，在热减量下的粘度波动越小。因此，适当增加碱度有助于降低粘度波动，对于当前的矿渣系统，适当的碱度应为1.15-1.20。另外，Al ₂ O ₃ / TiO ₂附近的温度变动小。该比率为0.6，并且在冶金生产中，应根据钛含量的装料波动及时调整热量输入，从而确保良好的流动性和炉渣与金属之间的充分反应。以上实验结果可为使用更多钒钛磁铁矿的炼铁企业提供参考。