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Evaluation of Sulfur Addition to the High Basicity Slag on the Sulfur, Aluminum, and Cleanliness of High Sulfur Al-Killed Molten Steel

Authors

  • Fang Jiang,

    Corresponding author
    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P. R. China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
    • State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P. R. China
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  • Guoguang Cheng,

    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P. R. China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
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  • Guoyu Qian,

    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P. R. China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
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  • You Xie,

    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P. R. China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
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  • Qixuan Rui,

    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P. R. China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
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  • Liang Yang

    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P. R. China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
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Abstract

In the present work, the influence of sulfur addition to the high basicity slag on the Al-killed molten steel with high sulfur content was investigated by using a vacuum induction furnace at 1873 K in MgO crucibles. CaO–SiO2–Al2O3–MgO–CaS slags were used to study the effect of high basicity slags with different CaS contents on sulfur loss, aluminum loss, and total oxygen content in the molten steel. It is shown that the sulfur content in the molten steel decreased with the time, and the addition of CaS into the slag can reduce the sulfur loss in the molten steel. Moreover, there was a decreasing tendency of the aluminum content in the molten steel with the time, and the addition of CaS into the slag can reduce the aluminum loss in the molten steel. Total oxygen content in the molten steel first increased and then decreased with the time when no CaS was added into the slag. However, it decreased monotonically with the time when the addition of CaS was made into the slag.

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