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.
|ジャーナル||Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan|
|出版ステータス||Published - 2009|
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