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

Masayuki Kami, Masahiro Terasawa, Atsushi Matsumoto, Kimihisa Ito

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    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
    Volume95
    Issue number3
    DOIs
    Publication statusPublished - 2009

    Fingerprint

    phosphorus pentoxide
    slags
    Slags
    Metals
    Experiments
    Polysilicon
    metals
    Phosphorus
    Ferrite
    phosphorus
    ferrites
    Solid solutions
    solid solutions
    Chemical analysis

    Keywords

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

    ASJC Scopus subject areas

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

    Cite this

    The model experiment on the formation of 2CaO SiO2-3CaO · P2O5 phase in the dephosphorization slag. / Kami, Masayuki; Terasawa, Masahiro; Matsumoto, Atsushi; Ito, Kimihisa.

    In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 95, No. 3, 2009, p. 236-240.

    Research output: Contribution to journalArticle

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    abstract = "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.",
    keywords = "Dephosphorization, Dicalcium ferrite, Dicalcium silicate, Multi-phase flux, Slag, Tricalcium phosphate",
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    AU - Ito, Kimihisa

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