A Thermodynamic Model for Calculating Sulphur Distribution Ratio between CaO-SiO2-MgO-Al2O3 Ironmaking Slags and Carbon Saturated Hot Metal Based on the Ion and Molecule Coexistence Theory

DOI Web Site 被引用文献9件 参考文献36件
  • Yang Xue-min
    State Key Lab of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences
  • Jiao Jin-sha
    State Key Lab of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences
  • Ding Ru-cai
    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
  • Shi Cheng-bin
    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
  • Guo Han-jie
    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

書誌事項

公開日
2009
DOI
  • 10.2355/isijinternational.49.1828
公開者
一般社団法人 日本鉄鋼協会

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説明

A thermodynamic model for calculating sulphur distribution ratio between CaO–SiO2–MgO–Al2O3 ironmaking slags and carbon saturated hot metal has been developed by using a thermodynamic model for calculating mass action concentrations of structural units or ion couples of ironmaking slags based on the ion and molecule coexistence theory.<br>The calculated mass action concentrations of structural units or ion couples in CaO–SiO2–MgO–Al2O3 ironmaking slags equilibrated with carbon saturated hot metal at 1773 K can be applied to represent reaction ability, like classic concept of activity. The calculated total sulphur distribution ratio shows an acceptable agreement with the tested sulphur distribution ratio between CaO–SiO2–MgO–Al2O3 ironmaking slags and carbon saturated hot metal from desulphurization experiments at 1773 K. Meanwhile, the developed thermodynamic model for calculating sulphur distribution ratio between CaO–SiO2–MgO–Al2O3 ironmaking slags and carbon saturated hot metal can quantitatively determine the respective contribution of free CaO and MgO in CaO–SiO2–MgO–Al2O3 slags. A very significant difference of desulphurization ability between free CaO and MgO has been found with free CaO accounting for 97% desulphurization potential comparing with free MgO as about 3% in CaO–SiO2–MgO–Al2O3 slags equilibrated with carbon saturated hot metal at 1773 K.

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