Dissolution Kinetics of Alumina into Mold Fluxes for Continuous Steel Casting

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概要

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• Dissolution kinetics of alumina into mold fluxes for the continuous steel casting was investigated by employing the rotating cylinder method. The dissolution rate of Al2O3 was determined by measuring weight loss of Al2O3 rod, initial dipping area and immersion time. It is concluded that the alumina dissolution is controlled not only by the mass transfer in the molten flux but also by the formation of intermediate compounds such as CaO · 6Al2O3, CaO · 2Al2O3, and 2CaO · Al2O3 · SiO2 on the rod/flux interface. Concentration driving force, rod rotation speed, temperature of molten flux and chemical composition are also important factors which affect the alumina dissolution. The dissolution rate increased with addition of MgO or CaF2, or up to 5%mass of Na2O, and then decreased with further increase in the amount of Na2O content. The physical erosion of the rod surface by the solid 2CaO · SiO2 dispersed in the liquid was attributed to fast alumina dissolution.

• 社団法人 日本鉄鋼協会の論文
• 2005-12-15

著者

• Lee Hae-Geon

  Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTEC

• Bui Anh-hoa

  Department Of Materials Science And Metallurgy Kyungpook National University

• HA Hyun-Mo

  Department of Materials Science and Engineering, Pohang University of Science and Technology

• CHUNG In-Sang

  Department of Materials Science and Metallurgy, Kyungpook National University

• Ha Hyun-mo

  Department Of Materials Science And Engineering Pohang University Of Science And Technology

• Lee Hae-geon

  Graduate Inst. Of Ferrous Technol. (gift) Pohang Univ. Of Sci. And Technol. (postech)

• Lee Hae-geon

  Graduate Institute Of Ferrous Technology (gift) Pohang University Of Science And Technology

• Chung In-sang

  Department Of Materials Science And Metallurgy Kyungpook National University

関連論文

• Experimental Investigations of Phase Equilibria of MnS Containing Sub-systems in the MnO–SiO2–Al2O3–MnS System
• Dissolution Kinetics of Alumina into Mold Fluxes for Continuous Steel Casting
• Experimental Study of Phase Equilibria in the MnO-"TiO_2"-"Ti_2O_3" System
• Experimental Investigations of Phase Equilibria of MnS Containing Sub-systems in the MnO-SiO_2-Al_2O_3-MnS System
• Chemical Reaction of Glazed Refractory with Al-deoxidized Molten Steel
• A CFD-based Nucleation-growth-removal Model for Inclusion Behavior in a Gas-agitated Ladle during Molten Steel Deoxidation
• Simulation Test for Crystallization of Inclusions in Semi-killed Steels during Heat Treatment Prior to Hot Rolling
• Thermodynamic Analysis of Mn-depleted Zone Near Ti Oxide Inclusions for Intragranular Nucleation of Ferrite in Steel
• Chemical Reaction of Glazed Refractory with Al-deoxidized and Ca-treated Molten Steel
• Experimental Study of Phase Equilibria in the MnO-SiO_2-"TiO_2"-"Ti_2O_3" System
• Water Model and CFD Studies of Bubble Dispersion and Inclusions Removal in Continuous Casting Mold of Steel
• Numerical Analysis of Surface Tension Gradient Effect on the Behavior of Gas Bubbles at the Solid/Liquid Interface of Steel
• Thermodynamics of the MnO–FeO–MnS–FeS–SiO2 System at SiO2 Saturation under Reducing Condition: Immiscibility in the Liquid Phase
• Numerical Analysis of Surface Tension Gradient Effect on the Behavior of Gas Bubbles at the Solid/Liquid Interface of Steel

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