Dissolution Behavior of Al_2O_3 and MgO Inclusions in the CaO-Al_2O_3-SiO_2 Slags : Formation of Ring-like Structure of MgAl_2O_4 and Ca_2SiO_4 around MgO Inclusions

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概要

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• The dissolution behavior of Al2O3 and MgO particles in various CaO–Al2O3–SiO2 slags was investigated using a confocal scanning laser microscope at 1 550°C. The dissolution paths of Al2O3 and MgO particles varied depending on slag compositions. Reaction products such as CaO·6Al2O3, CaO·2Al2O3 and Ca2Al2SiO7 formed on the surface of Al2O3 particle. Surprisingly, however, in the case where reaction products were MgAl2O4 and Ca2SiO4 phases, these reaction products formed ring-like structure around MgO particles. Inside of the ring-like structure, liquid phases of which compositions correspond to the co-saturation compositions with MgO and MgAl2O4 (Ca2SiO4) phases. In addition, this unique dissolution phenomenon retarded the dissolution rate of MgO particle in molten slags. In the present study, the dissolution mechanism of this unique dissolution phenomenon is proposed.

• 社団法人 日本鉄鋼協会の論文
• 2006-11-15

著者

• JUNG In-Ho

  Research Institute of Industrial Science & Technology (RIST)

• Lee Hae-geon

  Gift Pohang University Of Science And Technology (postech)

• Park Jin-hong

  Gift Pohang University Of Science And Technology (postech)

• LEE Hae-Geon

  GIFT, POSTECH

• PARK Jin-Hong

  GIFT, Pohang University of Science and Technology (POSTECH)

• LEE Hae-Geon

  GIFT, Pohang University of Science and Technology (POSTECH)

関連論文

• Phase Equilibria and Thermodynamic Properties of the CaO-MnO-Al_2O_3-SiO_2 System by Critical Evaluation, Modeling and Experiment
• Critical Thermodynamic Evaluation and Optimization of the CaO-MnO-SiO_2 and CaO-MnO-Al_2O_3 Systems
• Thermodynamic Modeling of Gas Solubility In Molten Slags (I) : Carbon and Nitrogen
• Simulation Test for Crystallization of Inclusions in Semi-killed Steels during Heat Treatment Prior to Hot Rolling
• Thermodynamic Modeling of Gas Solubility in Molten Slags (II) : Water
• Effect of Al on the Evolution of Non-metallic Inclusions in the Mn-Si-Ti-Mg Deoxidized Steel During Solidification : Experiments and Thermodynamic Calculations
• Dissolution Behavior of Al_2O_3 and MgO Inclusions in the CaO-Al_2O_3-SiO_2 Slags : Formation of Ring-like Structure of MgAl_2O_4 and Ca_2SiO_4 around MgO Inclusions
• 耐火物の浸食に対する熱力学データベースの利用技術
• Reoxidation of Al-Ti Containing Steels by CaO-Al_2O_3-MgO-SiO_2 Slag

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