Thermodynamics of chromium oxides in CaO-SiO2-CaF2 slag

Yasushi Okabe, Isao Tajima, Kimihisa Ito

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The distribution ratio of chromium between a CaO-SiO2-CaF2 slag and liquid silver under the oxygen partial pressure used in practical hot-metal dephosphorization treatment was measured at 1623 K. The distribution ratio was minimal when the basicity index of a slag, wt pct CaO/wt pct SiO2, was about 2. The redox equilibrium between CrO (Cr2+) and CrO1.5 (Cr3+) in the slag was also measured as a function of slag composition. The calculated activity coefficient of CrO had a maximum value at wt pct CaO/wt pct SiO2 = 2, whereas that of CrO1.5 decreased monotonously with the increase in slag basicity.

Original languageEnglish
Pages (from-to)131-136
Number of pages6
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume29
Issue number1
DOIs
Publication statusPublished - 1998 Jan 1

ASJC Scopus subject areas

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

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