| Effect of Al2O3 on the viscosity of CaO-SiO2-Al2O3-MgO-Cr2O3 slags |
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| 作者姓名： | Chen-yang Xu Cui Wang Ren-ze Xu Jian-liang Zhang Ke-xin Jiao |
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| 作者单位： | School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China |
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| 基金项目： | This work was financially supported by the Fundamental Research Funds for the Central Universities of China |
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| 摘 要： | We investigated the effect of Al2O3 content on the viscosity of CaO-SiO2-Al2O3-8wt%MgO-1wt%Cr2O3(mass ratio of CaO/SiO2 is 1.0,and Al2O3 content is 17wt%-29wt%)slags.The results show that the viscosity of the slag increases gradually with increases in the Al2O3 content in the range of 17wt%to 29wt%due to the role of Al2O3 as a network former in the polymerization of the aluminosilicate structure of the slag.With increases in the Al2O3 content from 17wt%to 29wt%,the apparent activation energy of the slags also increases from 180.85 to 210.23 kJ/mol,which is consistent with the variation in the critical temperature.The Fourier-transform infrared spectra indicate that the degree of polymerization of this slag is increased by the addition of Al2O3.The application of Iida’s model for predicting the slag viscosity in the presence of Cr2O3 indicates that the calculated viscosity values fit well with the measured values when both the temperature and Al2O3 content are at relatively low levels,i.e.,the temperature range of 1673 to 1803 K and the Al2O3 content range of 17wt%-29wt%in CaO-SiO2-Al2O3-8wt%MgO-1wt%Cr2O3 slag.
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| 关 键 词： | SLAG VISCOSITY high aluminium oxide apparent activation energy structure viscosity prediction |
Effect of Al2O3 on the viscosity of CaO–SiO2–Al2O3–MgO–Cr2O3 slags |
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| Chen-yang Xu,Cui Wang,Ren-ze Xu,Jian-liang Zhang,Ke-xin Jiao.Effect of Al2O3 on the viscosity of CaO-SiO2-Al2O3-MgO-Cr2O3 slags[J].International Journal of Minerals,Metallurgy and Materials,2021,28(5):797-803. |
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| Authors: | Chen-yang Xu Cui Wang Ren-ze Xu Jian-liang Zhang Ke-xin Jiao |
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| Abstract: | We investigated the effect of Al2O3 content on the viscosity of CaO–SiO2–Al2O3–8wt％MgO–1wt％Cr2O3 (mass ratio of CaO/SiO2 is 1.0, and Al2O3 content is 17wt％–29wt％) slags. The results show that the viscosity of the slag increases gradually with increases in the Al2O3 content in the range of 17wt％ to 29wt％ due to the role of Al2O3 as a network former in the polymerization of the aluminosilicate structure of the slag. With increases in the Al2O3 content from 17wt％ to 29wt％, the apparent activation energy of the slags also increases from 180.85 to 210.23 kJ/mol, which is consistent with the variation in the critical temperature. The Fourier-transform infrared spectra indicate that the degree of polymerization of this slag is increased by the addition of Al2O3. The application of Iida's model for predicting the slag viscosity in the pres-ence of Cr2O3 indicates that the calculated viscosity values fit well with the measured values when both the temperature and Al2O3 content are at relatively low levels, i.e., the temperature range of 1673 to 1803 K and the Al2O3 content range of 17wt％–29wt％ in CaO–SiO2–Al2O3–8wt％MgO–1wt％Cr2O3 slag. |
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| Keywords: | slag viscosity high aluminium oxide apparent activation energy structure viscosity prediction |
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