FeO-Fe<SUB>2</SUB>O<SUB>3</SUB>-CaO-SiO<SUB>2</SUB>系スラッグの酸化鉄の活量ならびにO<SUB>2</SUB>-スラッグ-熔鉄の平衡酸素圧

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タイトル別名
  • Activities of Iron Oxides in FeO-Fe<SUB>2</SUB>O<SUB>3</SUB>-CaO-SiO<SUB>2</SUB> System and Equilibrium Oxygen Pressures of O<SUB>2</SUB>-Slag-Liquid Iron System
  • FeO-Fe2O3-CaO-SiO2系スラッグの酸化鉄の活量ならびにO2-スラッグ-熔鉄の平衡酸素圧
  • FeO-Fe2O3-CaO-SiO2ケイ スラッグ ノ サンカテツ ノ カツリョウ ナラビニ O2-スラッグ-ヨウテツ ノ ヘイコウ サンソアツ

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The formulae expressing activities of FeO, Fe2O3, and total FeO in FeO-Fe2O3-CaO-SiO2 slag have been derived from the Gibbs’ free energy previously obtained by a statistical thermodynamical method, and these activities have been numerically calculated in the range of the oxygen pressure from 10−10 to 1 atm by using constants calculated from phase diagrams and heats of formation. It has been clarified by these calculations that the activities of FeO and total FeO increase but the activity of Fe2O3 decreases as the oxygen pressure decreases. Based on the condition of equilibrium of liquid iron/FeO-Fe2O3-CaO-SiO2/O2 atmosphere, the oxygen pressures where the liquid iron and FeO-Fe2O3-CaO-SiO2 melt are in equilibrium have been derived and numerically calculated for any composition of melts at 1600°.

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