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

doi:10.2355/tetsutohagane.95.236

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

School of Fundamental Science and Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	236-240
Number of pages	5
Journal	Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume	95
Issue number	3
DOIs	https://doi.org/10.2355/tetsutohagane.95.236
Publication status	Published - 2009

Keywords

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

Access to Document

10.2355/tetsutohagane.95.236

Cite this

@article{94cf012e280e4deb82d826e1937f0554,

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

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",

author = "Masayuki Kami and Masahiro Terasawa and Atsushi Matsumoto and Kimihisa, {I. T.O.}",

note = "Funding Information: This study was sponsored by Janssen Pharmaceuticals. Writing assistance was provided by Stephanie Gibson (Medical Writer) of Zoetic Science, an Ashfield company, part of UDG Healthcare plc, Macclesfield, UK; this support was funded by Janssen Pharmaceuticals. ",

year = "2009",

doi = "10.2355/tetsutohagane.95.236",

language = "English",

volume = "95",

pages = "236--240",

journal = "Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan",

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T1 - The model experiment on the formation of 2CaO SiO2-3CaO · P2O5 phase in the dephosphorization slag

AU - Kami, Masayuki

AU - Terasawa, Masahiro

AU - Matsumoto, Atsushi

AU - Kimihisa, I. T.O.

N1 - Funding Information: This study was sponsored by Janssen Pharmaceuticals. Writing assistance was provided by Stephanie Gibson (Medical Writer) of Zoetic Science, an Ashfield company, part of UDG Healthcare plc, Macclesfield, UK; this support was funded by Janssen Pharmaceuticals.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - Dephosphorization

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KW - Dicalcium silicate

KW - Multi-phase flux

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KW - Tricalcium phosphate

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