A model for estimating the viscosity of blast furnace slags with optical basicity |
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| Authors: | Xiao-jun Hu Zhong-shan Ren Guo-hua Zhang Li-jun Wang Kuo-chih Chou |
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| Institution: | 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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| Abstract: | Viscosity is an important physical property of blast furnace slags and has a great influence on blast furnace operations. Because of time consumption and difficulties encountered during high temperature experimental measurement, viscosity data are also limited, so a reasonable and accurate estimation model is required to provide the data for controlling and optimizing the blast furnace process. In the present study a viscosity model was proposed for blast furnace slags. In the model the activation energy was calculated by the optical basicity corrected for cations required for the charge compensation of AlO 4 5? , and the temperature dependence was described by the Weymann-Frenkel equation. The estimated viscosity values of the CaO-Al2O3-SiO2, CaO-Al2O3-SiO2-MgO, and CaO-Al2O3-SiO2-MgO-TiO2 systems fit well with experiment data, with the mean deviation less than 25%. |
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