TiO2-FeO-Ti2O3 slag system is the dominant system for industrial high-titania slag production. In the present work, viscosities of TiO2-FeO and TiO2-FeO-Ti2O3 systems were experimentally determined using the concentric rotating cylinder method under argon atmosphere. A viscosity model suitable for the TiO2-FeO-Ti2O3 slag system was then established based on the modification of the Vogel-Fulcher-Tammann (VFT) equation. The experimental results indicate that completely melted high-titania slags exhibit very low viscosity of around 0.8 dPa s with negligible dependence on temperature and compositions. However, it increases dramatically with decreasing temperature slightly below the critical temperature. Besides, the increase in FeO content was found to remarkably lower the critical temperature, while the addition of Ti2O3 increases it. The developed model can predict the viscosities of the TiO2-FeO-Ti2O3 and TiO2-FeO systems over wide ranges of compositions and temperatures within experimental uncertainties. The average relative error for the present model calculation is < 18.82 pct, which is better than the previously developed models for silicate slags reported in the literature. An iso-viscosity distribution diagram was made for the TiO2-FeO-Ti2O3 slag system, which can serve as a roadmap for the Ilmenite smelting reduction process as well as the high titania slags tapping process.

中文翻译：

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模拟高二氧化钛渣的粘度

TiO2-FeO-Ti2O3渣体系是工业高钛渣生产的主导体系。在目前的工作中，TiO2-FeO 和 TiO2-FeO-Ti2O3 体系的粘度是在氩气气氛下使用同心旋转圆柱体法通过实验确定的。然后基于 Vogel-Fulcher-Tammann (VFT) 方程的修正建立了适用于 TiO2-FeO-Ti2O3 渣体系的粘度模型。实验结果表明，完全熔化的高二氧化钛渣表现出非常低的粘度，约为 0.8 dPa s，对温度和成分的依赖性可以忽略不计。然而，它随着温度略低于临界温度的降低而急剧增加。此外，发现 FeO 含量的增加显着降低了临界温度，而 Ti2O3 的添加则增加了临界温度。开发的模型可以在实验不确定性内预测 TiO2-FeO-Ti2O3 和 TiO2-FeO 系统在广泛的成分和温度范围内的粘度。本模型计算的平均相对误差 < 18.82 pct，优于文献中报道的先前开发的硅酸盐炉渣模型。绘制了 TiO2-FeO-Ti2O3 渣体系的等粘度分布图，可作为钛铁矿冶炼还原工艺和高二氧化钛渣出钢工艺路线图。这比文献中报道的先前开发的硅酸盐炉渣模型更好。绘制了 TiO2-FeO-Ti2O3 渣体系的等粘度分布图，可作为钛铁矿冶炼还原工艺和高二氧化钛渣出钢工艺路线图。这比文献中报道的先前开发的硅酸盐炉渣模型更好。绘制了 TiO2-FeO-Ti2O3 渣体系的等粘度分布图，可作为钛铁矿冶炼还原工艺和高二氧化钛渣出钢工艺路线图。