Thermodynamic Study on Redox Equilibrium of Manganese in CaO&ndash;SiO<SUB>2</SUB>&ndash;Mn<SUB>t</SUB>O&ndash;MgO<SUB>sat</SUB>

DOI Web Site 被引用文献1件 参考文献13件
  • Jung Sung-Mo
    Department of Materials Science and Engineering, Pohang University of Science and Technology
  • Min Dong-Jun
    Department of Materials Science and Engineering, Pohang University of Science and Technology
  • Rhee Chang-Hee
    Department of Materials Science and Engineering, Pohang University of Science and Technology

書誌事項

タイトル別名
  • Thermodynamic Study on Redox Equilibrium of Manganese in CaO–SiO<SUB>2</SUB>–Mn<SUB>t</SUB>O–MgO<SUB>sat</SUB>

この論文をさがす

抄録

Experiments were carried out to determine the ratio of Mn3+/Mn2+ at equilibrium in CaO–SiO2–MntO–MgO slag under various slag compositions and oxygen partial pressures in temperature range of 1350∼1450°C. As magnesia crucibles were used, the solubility limit of MgO could also be determined. Results indicate that the Mn3+/Mn2+ ratio increases with slag basicity as well as with MntO content. The solubility of MgO, on the other hand, decreases as the slag basicity increases and also with increasing MntO content. The ratio (%Mn3+)/(%Mn2+) does not change in the oxygen partial pressure between 10−12atm and 10−6atm. At the constant oxygen partial pressure, the value of log(%Mn3+)/(%Mn2+) does not change with the slag basicity less than 0.9. On the other hand, the value of log(%Mn3+)/(%Mn2+) decreases with increasing basicity of slag more than 0.9. Although there is small deviation in the value of log(%Mn3+)/(%Mn2+), the value does not change in the slag composition containing more than 16% MntO. Temperature dependence of the ratio (%Mn3+)/(%Mn2+) at 5.1×10−9atm in the temperature range of 1350 to 1450°C can be expressed as follows. From the expression, the reaction enthalphy was calculated to be −75kcal/mol.<BR>(Remark: Graphics omitted.)

収録刊行物

被引用文献 (1)*注記

もっと見る

参考文献 (13)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ