Abstract
As a result of the consumption and the rising cost of raw materials for ironmaking, steel producers have increased their utilization of low-cost, low-grade raw materials such as high alumina iron ore. The effect of Al2O3 and the Al2O3/SiO2 ratio on the viscosity, surface tension and sulfide capacity of the CaO–SiO2–Al2O3–MgO–TiO2 blast furnace slag system were studied in the present work. At a fixed CaO/SiO2 ratio of 1.20, 9 mass pct MgO, and 1 mass pct TiO2, the viscosity increases with an increase in Al2O3 content at a range of 16–24 mass pct, and decreases when the Al2O3 is higher than 24 mass pct. Increasing Al2O3/SiO2 from 0.47 to 0.92 causes a slight decrease in viscosity of the slags and has an opposite effect when Al2O3/SiO2 is more than 0.92. The surface tension increases with increasing Al2O3 content at a fixed Al2O3 content and Al2O3/SiO2 at a fixed CaO content. The desulfurizing capacity decreases with increasing of Al2O3 content, while increases with increasing Al2O3/SiO2 at a fixed CaO content.
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Acknowledgements
This study was supported by The National Natural Science Foundation of China (No. 51234010).
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Yan, Z., Pang, Z., Lv, Xw., Qiu, G., Bai, C. (2018). Physicochemical Properties of High Alumina Blast Furnace Slag. In: Hwang, JY., et al. 9th International Symposium on High-Temperature Metallurgical Processing. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72138-5_28
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DOI: https://doi.org/10.1007/978-3-319-72138-5_28
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