Lead solubility in FeO x-CaO-SiO 2 slags at iron saturation

Masami Kudo, Evgueni Jak, Peter Hayes, Katsunori Yamaguchi, Yoichi Takeda

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Abstract

Experiments have been carried out to determine the equilibria between FeO x-CaO-SiO 2 slag and lead metal in iron crucibles at temperatures ranging from 1473 to 1573 K. It has been found that the highest lead solubilities are observed in the silica-saturated iron silicate slags, while the lowest solubilities are observed in the CaO-saturated calcium ferrite slags. The activity coefficient of PbO varies from 0.15 to 3, depending on the slag composition. Changes in temperature do not have a significant impact on the activity coefficient. The activity of FeO and pct Fe 3+/pct Fe 2+ ratios have been determined as a function of slag composition. These new experimental data have been incorporated into an optimized thermodynamic slag model using the computer package FACT.

Original languageEnglish
Pages (from-to)15-24
Number of pages10
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume31
Issue number1
Publication statusPublished - 2000
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

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