Dissolution behavior of Al2O3 into tundish slag for high-al steel
Dissolution behavior of Al2O3 into tundish slag for high-al steel
复制标题
Al2O3在高铝钢中间包渣中的溶解行为
DOI：
10.1016/j.jmrt.2020.07.107
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发表时间：
2020-09
期刊：
影响因子：
--
通讯作者：
Qian Wang
中科院分区：
文献类型：
--
作者：
Gujun Chen;Shengping He;Qian Wang
中间包渣的成分对钢水洁净度的控制至关重要。通过相图计算结合钢渣反应初步确定了高铝钢38 CrMoAl的钢渣成分，并采用旋转柱法进一步研究了钢渣成分对Al 2 O3溶于钢渣的影响。热力学分析表明，MgO<6wt%的SiO2最小化CaO-Al_2 O_3（wt%CaO/wt % Al_2 O_3 = 1.0-1.4）渣系适用于38 CrMoAl钢的精炼操作。旋转实验结果表明，熔渣中的传质是Al 2 O3溶解到CaO-Al 2 O3基熔渣中的限速因素，熔渣的粘度与Al 2 O3的溶解速率密切相关。结果表明，提高CaO/Al 2 O3的质量比以及添加少量CaF 2和Na 2 O均能提高Al 2 O3的溶解速率。提出了溶出Al 2 O3的最佳渣系组成：CaO/Al 2 O3 = 1.1，MgO = 5wt%，CaF 2 = 6wt%，Na 2 O = 5wt%，SiO2含量应尽量少。工厂试验的结果表明，对目前的炉渣进行夹杂物去除是有益的。
Tundish slag composition is of vital importance to the control of steel cleanliness. In the present study, computation of phase diagram, accompanied with steel–slag reaction, was performed to preliminarily determine the tundish slag composition for high-Al steel 38CrMoAl, and the rotating cylinder method was, then, applied to further clarify the influence of slag composition on Al2O3dissolution into tundish slag. Thermodynamic analysis suggested that SiO2-minimized CaO–Al2O3(wt%CaO/wt%Al2O3= 1.0–1.4) slag with MgO<6 wt% was suitable for tundish operation of 38CrMoAl steel. The results of rotating experiment indicated that the mass transfer in the liquid slag was the rate-limiting element of Al2O3dissolution into the CaO–Al2O3based slag and hence the dissolution rate was strongly related to the slag viscosity. The Al2O3dissolution rate was found to be improved by increasing the wt%CaO/wt%Al2O3ratio as well as adding small amounts of CaF2and Na2O. The optimal slag composition for Al2O3dissolution was put forward: wt%CaO/wt%Al2O3= 1.1, MgO = 5 wt%, CaF2= 6 wt%, Na2O = 5 wt%, and SiO2content should be minimized. Results from plant trials demonstrated the benefit of inclusion removal for present tundish slag.
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DOI：
10.1016/j.jmrt.2014.03.011
发表时间：
2014-04
期刊：
Journal of materials research and technology
影响因子：
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作者：
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通讯作者：
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影响因子：
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发表时间：
1997-04
期刊：
Metallurgical and Materials Transactions B
影响因子：
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DOI：
10.1034/j.1600-0692.2003.20631.x
发表时间：
2003-08
期刊：
Scandinavian Journal of Metallurgy
影响因子：
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作者：
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