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低碳TWIP鋼AOD氧化精煉過程數學模型

Mathematical model for the AOD oxidation refining process of low carbon TWIP steel

  • 摘要: 依據AOD精煉反應前期為供氧控速、后期為碳擴散控速的機理建立了低碳TWIP鋼AOD氧化精煉過程數學模型.對8t AOD冶煉TWIP鋼氧化過程鋼液中碳、硅和錳含量變化進行了計算,碳含量變化與實測數據偏差小于5%.研究表明,8t AOD冶煉TWIP鋼脫碳的臨界碳含量處于0.33%~0.38%之間.

     

    Abstract: Based on the mechanism that the oxidation rate of carbon is primarily related to oxygen supply in the earlier stage and mass transfer of carbon in molten steel in the later stage,a mathematical model was proposed to describe the argon oxygen decarburization(AOD) oxidation refining process of low carbon twinning induced plasticity(TWIP) steel. The variations of C,Si and Mn contents in molten steel in an 8 t AOD converter during the oxidation refining process were analyzed by this model. The result shows that the error of the calculated carbon content is less than 5% compared with the measured values. It is also found that the critical carbon content of decarburization of the TWIP steel in the 8 t AOD converter is between 0.33% and 0.38%.

     

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