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Slag for decopperization and sulphur control in molten steel

  • Jian-jun Wang
  • Shang-xing Guo
  • Li Zhou
  • Qiang Li
Article

Abstract

Decopperization in molten steel with FeS-Na2S slag was investigated in the laboratory. It was found that with an increase in FeS content of the FeS-Na2S slag, the decopperization ratio increased. The decopperization ratio could reach the maximum of 71.6% in hot metal. The decopperization ratio was closely related to the carbon content, and the higher the carbon content, the higher was the decopperization ratio. Sulphur addition was found in the process of decopperization, and the increase in sulphur content of molten steel was about 0. 2%–0. 42%. However, by adding 30%–50% of BaO to the FeS-Na2S slag, the addition of sulfur content in molten steel could be reduced by about 50%. The finer slag system composition was FeS : Na2S : BaO=40 : 20 : 40.

Key words

molten steel decopperization FeS 

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References

  1. 1.
    LI Lian-sheng, WANG Fu-ming, XIANG Chang-xiang, et al. Decopperization in Steel Melt by Gasification [J]. Journal of University of Science and Technology Beijing, 1999, 21(2): 161.Google Scholar
  2. 2.
    LI Su-qin, YU Bing-jie, LI Shi-qi, et al. Exploration on Decoppering of Molten Steel by Filtering [J]. Engineering Chemistry and Metallurgy, 2000, 21(3): 314 (in Chinese).Google Scholar
  3. 3.
    Wang C, Nagasaka T, Hino M, et al. Copper Distribution Between Molten FeS-NaS0.5 Flux and Carbon Saturated Iron Melt [J]. ISIJ International, 1991, 31(11): 1300.CrossRefGoogle Scholar
  4. 4.
    Wang C, Nagasaka T, Hino M, et al. Copper Distribution Between FeS-Alkaline or Alkaline Earth Metal Sulfide Fluxes and Carbon Saturated Iron Melt [J]. ISIJ International, 1991, 31 (11): 1309.CrossRefGoogle Scholar
  5. 5.
    Imai T, Sano N. The Copper Partition Between Na2S Bearing Fluxes and Carbon-Saturated Iron Melt [J]. Transactions ISIJ, 1988, 28(12): 999.CrossRefGoogle Scholar

Copyright information

© China Iron and Steel Research Institute Group 2009

Authors and Affiliations

  • Jian-jun Wang
    • 1
  • Shang-xing Guo
    • 1
  • Li Zhou
    • 1
  • Qiang Li
    • 1
  1. 1.Metallurgy and Resources InstituteAnhui University of TechnologyMa’anshan, AnhuiChina

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