Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (6): 824-827.DOI: 10.12068/j.issn.1005-3026.2020.06.011

• Materials & Metallurgy • Previous Articles     Next Articles

Effect of Oxygen Concentration on Hot Metal Desulfurization with Magnesium Vapor

SU Jian-ming, DOU Zhi-he, ZHANG Ting-an, LIU Yan   

  1. Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education, Northeastern University, Shenyang 110819, China.
  • Received:2019-10-08 Revised:2019-10-08 Online:2020-06-15 Published:2020-06-12
  • Contact: ZHANG Ting-an
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Abstract: In view of the low utilization rate of magnesium generally obtained under traditional desulfurization processing, the method of bottom-blown magnesium vapor was used for hot metal desulfurization in order to optimize the dynamic conditions and to improve the utilization rate of magnesium in hot metal desulfurization. Thermodynamic calculation of the equilibrium concentration of sulfur under different oxygen concentrations was carried out, and the effect of oxygen concentration on the kinetics of hot metal desulfurization process was studied by experiments. The results show that the reduction of oxygen concentration in molten iron is helpful for promoting the desulfurization with magnesium vapor. When oxygen concentration arrives 62×10-6, the utilization rate of magnesium can reach 78%, leading to a desulfurization rate of 82% and a mass transfer coefficient of desulfurization of 0.0122m/s.

Key words: magnesium vapor, hot metal desulfurization, aluminum-oxygen balance, sulfur-oxygen balance

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