Viscous Behavior of FeO-Bearing Slag Melts Considering Structure of Slag

Sunghee Lee, Dong Joon Min

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


In the present study, an investigation on the viscosity of FeO-bearing slag, clarifies the effect of CaO/SiO2 and FeO from an ionic structure perspective. The viscosity of FeO-bearing slag shows a complex dependence on CaO/SiO2, with viscosity minima for CaO/SiO2 = 1.3. It is suggested that the viscosity behavior is caused by the transition in the ionic structure of the slag from a melilite-like structure to a dicalcium-silicate-like structure. In addition, it is confirmed that FeO dissociates the silicate network structure in the melilite region and decreases the viscosity. In the dicalcium silicate region, however, viscosity decreases with increasing FeO owing to interference in the attraction between the calcium cation and the orthosilicate anion. Based on these experimental results and discussions, the relationship between the slag viscosity and ionic structure of the slag, and the influence of FeO on this relationship, are discussed in detail.

Original languageEnglish
Article number1800055
JournalSteel Research International
Issue number8
Publication statusPublished - 2018 Aug

Bibliographical note

Funding Information:
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning(KETEP) and the Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea (No. 20172010106300).

Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry


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