Aluminium-Oxygen Equilibrium between CaO-Al2O3 Melts and Liquid Iron

Hideaki Suito, Hajime Inoue, Ryo Inoue

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

Aluminium-oxygen equilibria between CaO-AI2O3 melts and liquid iron were studied in the temperature range of 1 823 to 1 923 K, using an alumina and lime crucibles. The equilibrium constant K for the reaction: 2AI + 30=AI203 was discussed with reference to the supersaturation for nucleation of alumina, and compared with the previous experimental and thermodynamic data. The supersaturation was observed in the experiments in which an Fe-AI alloy with low concentrations of initial oxygen was used under the condition of no stirring. Supersaturation increased with a decrease of oxygen content in liquid iron. Two types of alumina inclusions with a size of 2-5μm and below 0.1 μm were observed by SEM.

Original languageEnglish
Pages (from-to)1381-1388
Number of pages8
JournalIsij International
Volume31
Issue number12
DOIs
Publication statusPublished - 1991 Jan

Keywords

  • CaO-AlO slags
  • activity of AlO
  • aluminium-oxygen equilibrium
  • deoxidation
  • super-saturation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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