The model experiment on the formation of 2CaO SiO2-3CaO · P2O5 phase in the dephosphorization slag

Masayuki Kami*, Masahiro Terasawa, Atsushi Matsumoto, I. T.O. Kimihisa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The formation of the Ca2SiO4-Ca3P 2O8 phase in a hot metal dephosphorization slag was investigated. The reaction of a P2O5-containing slag with a solid porous CaO was observed at 1673 K by using a hot thermo-couple method. A CaO-FeO layer was formed near the interface, and next to it a solid solution of Ca2SiO4-Ca3P2O8 containing FeO was observed. The results could be explained in terms of the model proposed by Hamano et al. The Fe-P-Si alloy was reacted with dicalcium ferrite at 1673K, and the samples were analyzed by XMA. The phosphorus concentrated phases were observed near the slag-metal interface. Their compositions could be approximated as 2(CaO+FeO) -SiO23(CaO+FeO)- P2O5 and their FeO concentration decreased as the progress of the reaction.

Original languageEnglish
Pages (from-to)236-240
Number of pages5
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Issue number3
Publication statusPublished - 2009


  • Dephosphorization
  • Dicalcium ferrite
  • Dicalcium silicate
  • Multi-phase flux
  • Slag
  • Tricalcium phosphate

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry


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