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首页> 外文期刊>Scandinavian Journal of Metallurgy >A model of reoxidation from the top slag and the effect on sulphur refining during vacuum degassing
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A model of reoxidation from the top slag and the effect on sulphur refining during vacuum degassing

机译：顶渣再氧化模型及其对真空脱气过程中硫精制的影响

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摘要

A 2-dimensional fluid-flow model covering 3 phases (steel, slag and gas) has been augmented to include thermodynamic equations to study simultaneous reoxidation and desulphurization, including macro kinetic behaviour. The numerical simulations were isothermal. Predicted steel and slag component concentrations were compared with plant data from vacuum degassing and the agreement was found to be quite good. When the initial FeO content in the slag was increased, the predicted desulphurization rate decreased, the final sulphur content in the steel increased, and aluminium loss increased. When the temperature was increased, the predicted aluminium loss decreased somewhat. The effect of changes in temperature on the predicted final sulphur content was influenced by the initial FeO content in the top slag. The results show that the model can be used for future work on the dynamic modelling of slag/metal reactions if the initial FeO contents is less than 3-4 percent (by weight).
机译：已扩展了涵盖3个阶段（钢，炉渣和气体）的二维流体流模型，以包含热力学方程，以研究同时进行的再氧化和脱硫，包括宏观动力学行为。数值模拟是等温的。将预测的钢和炉渣成分浓度与真空脱气的工厂数据进行了比较，发现一致性很好。当炉渣中的初始FeO含量增加时，预计的脱硫率降低，钢中的最终硫含量增加，铝损失增加。当温度升高时，预测的铝损失有所降低。温度变化对预计最终硫含量的影响受炉顶渣中初始FeO含量的影响。结果表明，如果初始FeO含量小于3-4％（按重量计），该模型可用于渣/金属反应动力学模型的未来工作。

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