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

研究成果: Article

抄録

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.

本文言語English
ページ(範囲)273-279
ページ数7
ジャーナルHigh Temperature Materials and Processes
31
3
DOI
出版ステータスPublished - 2012 6 1
外部発表はい

ASJC Scopus subject areas

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

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