Viscosity model for iron blast furnace slags in SiO2-Al2O3-CaO-MgO System

Chen Han, Mao Chen, Weidong Zhang, Zhixing Zhao, Tim Evans, Anh V. Nguyen, Baojun Zhao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Operational performance of ironmaking processes is determined to a great extent by its slag viscosity. A simple and accurate viscosity model for blast furnace (BF) slags has been developed based on the Urbain model using the critically evaluated experimental data reported by the authors and other researchers. A total number of 2958 viscosity measurements from 582 compositions in the SiO2-Al2O3-CaO-MgO system have been collected from 34 publications. These data have been critically reviewed for developing a viscosity model for ironmaking slags. The model has been significantly revised by consideration of alumina behavior in this system and re-optimization of the parameters using large quantity and high quality data. The new model has less number of parameters, but better performance in the viscosity predictions. Applications of the new viscosity model on BF operation have been discussed.

Original languageEnglish
Pages (from-to)678-685
Number of pages8
JournalSteel Research International
Issue number6
Publication statusPublished - 1 Jun 2015
Externally publishedYes


  • blast furnace
  • ironmaking
  • slag
  • viscosity model


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