MgO Solubility in Steelmaking Slags

Mohammed A. Tayeb, Andre N. Assis, Seetharaman Sridhar, Richard J. Fruehan

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


A predominantly liquid and MgO-saturated slag is preferred in EAF and BOF steelmaking. Fully liquid slag provides a better environment for faster mass transfer due to lower bulk viscosities and larger liquid slag volume and these help dephosphorization and desulfurization. Also, an MgO-saturated slag would be preferable in order to increase the lifetime of furnace refractory lining by reducing the extent of dissolution. This article will demonstrate the factors that would influence MgO saturation, which includes FeO, CaO, P2O5, and Al2O3 contents and temperature. In addition, this paper comments on the applicability and accuracy of FactSage prediction, which are compared to laboratory experiments. The results indicate that FactSage may underestimate MgO solubility by up to 2.5 wt pct at higher basicities while there is reasonable agreement with current measurements at lower basicities.

Original languageEnglish (US)
Article number352
Pages (from-to)1112-1114
Number of pages3
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Issue number3
StatePublished - Jun 26 2015
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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