Vaporization behaviors of Zn in FetO-CaO-SiO2-Al2O3 slag system

Yan Ling Zhang, Shi Qi Li, Eiki Kasai, Jun Ping Lu, Xiao Dong Guo

研究成果: Article査読

抄録

Vaporization behavior of zinc in the slag system FetO-CaO-SiO2-Al2O3 was examined, including the formation ratio of vapor species and their partitioning as well as the effect of process factors such as temperature, holding time, slag composition, and addition of reductive agents. A thermodynamic estimation with the principle of Gibbs free energy minimization shows that the major vapor species from the sample of FeO-CaO-SiO2-Al2O3 system + ZnO + CaCl2 are metallic Zn, ZnCl2 and FeCl2 in the experimental temperature range. The results suggest that the formation ratio of metallic Zn and FeCl2 increases with temperature increasing, while that of ZnCl2 decreases. The evaporation of sample is initially fast and becomes steady after holding for 10 min. Gaseous ZnCl2 is mainly formed during heating period, at the holding stage it reacts with FeO to produce gaseous FeCl2. With regard to slag compositions, FeO and basicity significantly affect the evaporation of zinc. The evaporation ratio of zinc can be enhanced by the addition of reductants such as carbon powder.

本文言語English
ページ(範囲)163-170
ページ数8
ジャーナルZhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
18
1
出版ステータスPublished - 2008 1月 1

ASJC Scopus subject areas

  • 凝縮系物理学
  • 金属および合金
  • 材料化学

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