Thermodynamic properties of lead oxide in a mixture of stainless steelmaking and nonferrous smelting slags

Nobuhiro Maruoka, Shigeru Ueda, Hiroyuki Shibata, Katsunori Yamaguchi, Shin Ya Kitamura

Research output: Contribution to journalArticle

Abstract

In our previous paper, a slag modification process involving the mixing of stainless steelmaking and nonferrous smelting slags was proposed for preventing the disintegration of the stainless steelmaking slag. In order to use this method, the behavior of heavy metals especially PbO contained in the nonferrous slag has to be assessed. In the present study, the activity coefficient of PbO in CaOSiO 2- Fe tO-Al 2O 3-MgO and CaO-SiO 2-Fe tO slags saturated with iron was measured at 1673 K. The results showed that the activity coefficient of PbO increased with basicity and had a maximum value when the basicity was approximately 1.0. The equilibrium PbO content in the modified slag had a minimum value that corresponded to a mixing ratio of 0.6. The trend was similar to the change in the removal ratio of PbO observed in the previous study. Therefore, the change in the oxygen potential and the change in the activity coefficient of PbO can be considered the cause of this trend.

Original languageEnglish
Pages (from-to)273-279
Number of pages7
JournalHigh Temperature Materials and Processes
Volume31
Issue number3
DOIs
Publication statusPublished - 2012 Jun 1
Externally publishedYes

Keywords

  • Activity coefficient
  • Nonferrous smelting slag
  • PbO
  • Stainless steelmaking slag

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Physical and Theoretical Chemistry

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