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Volume 13 Issue 3
Oct.  2021
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Article Contents
Zhang Jian, Wang Chao. Calculating Model of Mass Action Concentrations for the Slag System CaO-FeO-SiO2[J]. Chinese Journal of Engineering, 1991, 13(3): 214-221. doi: 10.13374/j.issn1001-053x.1991.03.021
Citation: Zhang Jian, Wang Chao. Calculating Model of Mass Action Concentrations for the Slag System CaO-FeO-SiO2[J]. Chinese Journal of Engineering, 1991, 13(3): 214-221. doi: 10.13374/j.issn1001-053x.1991.03.021

Calculating Model of Mass Action Concentrations for the Slag System CaO-FeO-SiO2

doi: 10.13374/j.issn1001-053x.1991.03.021
  • Received Date: 1990-12-21
    Available Online: 2021-10-26
  • In accordance with the coexistence theory of slag structure, CaO-SiO2 and CaO-FeO-SiO2 phase diagrams and corresponding thermodynamic data, a calculating model of mass action concentrations for CaO-FeO-SiO2 melts at 1 600℃ has been deduced. The calculated contours of iso-mass action concentration NFeO are fairly identical with the contours of iso-activity αFeO measured. The apices of iso-NFeO contours are located at the range of slag basicity 1.703 to 1,778, so for the decarburization and precipitation deoxidation the slag basicity had better be kept in that range, and on the contrary for diffusion deoxi-dation the slag basicity had better be kept off that range. Similarity of iso-silicates mass action concentration contours to the corresponding iso-thermal contours of CaO-FeO-SiO2 phase diagram shows that silicates play an important role in the melting temperatures of slag system mentioned.

     

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