ABSTRACT

A mathematical model of an industrial Single Snorkel Refining Furnace (SSRF) has been developed to investigate dehydrogenation behaviour in the vacuum refining process. Dehydrogenation reactions were considered to take place at three sites: Ar bubble surface, bath surface, and the bulk steel. The effects of Ar bubble behaviour and H2 heterogeneous nucleation behaviour of the bulk steel on dehydrogenation were taken into account specifically. The simulation results are in good agreement with the measured industrial data. Using the model, the dehydrogenation rate at different sites and its contribution to total dehydrogenation value were evaluated in detail. The results indicated that bulk steel dehydrogenation occurred only the high concentration range, while the other two reactions participated in the whole refining process. In addition, the effect of argon flow rate on the dehydrogenation rate was also obtained and the reasonable range of argon flow rate for SSRF treatment has been recommended.

摘要

已经开发了工业单通气管精炼炉 (SSRF) 的数学模型来研究真空精炼过程中的脱氢行为。脱氢反应被认为发生在三个位置：Ar 气泡表面、熔池表面和大块钢。特别考虑了大块钢的Ar气泡行为和H2异相成核行为对脱氢的影响。仿真结果与实测工业数据吻合良好。使用该模型，详细评估了不同位点的脱氢速率及其对总脱氢值的贡献。结果表明，大块钢脱氢仅发生在高浓度范围内，其他两个反应参与了整个精炼过程。此外，