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Experimental Study on Deep Desulfurizer in LF Process

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Abstract

CaO−Al2O3−SiO2−CaF2−MgO was selected as the slag system for desulfurization in LF process. The reaction between steel and slag during desulfurization has been simulated by using Factsage software to study the influence of component on the sulfur distribution ratio. In order to research the influence of CaO content, aluminum powder content and its granularity on desulfurization, laboratory experiments have been carried out in a 200 kg inductive furnace. Results showed that the optimal composition of deep desulfurizer is wCaO = 64% and aluminium powder 10% with a granularity of 30 μm. Industrial trials showed that the main composition range of final slag in LF process is wCaO = 53.0%–57.0%, wAl2O3=23.4%–25.1%, wSiO2=8.1%–10.0%, and wCaF2=3.2%–4.7%. The sulfur mass percent in steel is lower than 0.000 8% with a desulfurization rate above 89%. According to the result of industrial production, this desulfurizer could meet the production requirement for ultra-low sulfur steel, of which sulfur mass percent is under 0.0015%.

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Authors and Affiliations

  1. Metallurgical and Ecological Engineering School, University of Science and Technology Beijing, Beijing, 100083, China

    Long Wu (Doctor Candidate) & Shi-qi Li

  2. Beijing Shenwu Environment and Energy Technology Company Group, Beijing, 102200, China

    Fen Pei

  3. Xinxing Pipes (Xinjiang) Resources Development Limited Company, 830000, Urumqi, Xinjiang, China

    Yu Chen

Authors
  1. Long Wu
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  2. Fen Pei
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  3. Yu Chen
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  4. Shi-qi Li
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Correspondence to Long Wu.

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Foundation Item: Item Sponsored by National Key Technology Research and Development Program in 11th Five-Year Plan of China (2007BAF08B01-03)

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Wu, L., Pei, F., Chen, Y. et al. Experimental Study on Deep Desulfurizer in LF Process. J. Iron Steel Res. Int. 19, 17–21 (2012). https://doi.org/10.1016/S1006-706X(12)60081-8

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  • DOI: https://doi.org/10.1016/S1006-706X(12)60081-8

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