Control and prediction of total oxygen in IF steel
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摘要: 分析了IF鋼冶煉過程中渣對鋼液中[Al]、[Ti]的氧化機理,在此基礎上提出了IF鋼加鋁脫氧后全氧的預測模型.結果表明,熔渣中(FeO)、(MnO)對鋼液的二次氧化存在兩種方式.當氧化物在渣中的傳質是反應限制性環節時,反應發生在渣/鋼界面,生成的脫氧產物分布在渣/鋼界面,此時渣的氧化性隨時間呈指數下降;當脫氧元素在鋼中傳質是反應限制性環節時,反應發生在鋼液內部.對某廠RH精煉渣的數據作回歸得到RH加鋁后渣的氧化性隨時間指數變化的關系式.Abstract: The reoxidation mechanisms of IF steel containing Al and Ti by reducible oxides in the slag were analyzed.A model of predicting total oxygen in the molten steel was established based on the reoxidation mechanisms.It was found that two different reaction mechanisms existed when(FeO) and(MnO) in the slag reoxidated the molten steel.Reoxidation occurred at the slag/steel interface when mass transfer of reducible oxides in the slag dominated the reaction,and the oxidability of the slag exponentially declined with prolonging time.When mass transfer of de-oxidative elements in the molten steel dominated the reaction,reoxidation carried out in the molt steel.A specific formula between the oxidability of the slag and time was obtained by regressing the data from a steelmaking plant.
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Key words:
- IF steel /
- reoxidation /
- total oxygen /
- prediction /
- mass transfer
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