石灰飽和Fe<SUB><I>t</I></SUB>O-CaO-P<SUB>2</SUB>O<SUB>5</SUB>-CaF<SUB>2</SUB>系スラグと溶鉄間のりん分配平衡

• 原 茂太

  大阪大学工学部 工博

• 床並 徹二

  大阪大学大学院(現:(株)神戸製鋼所)

• 荻野 和己

  大阪大学工学部 工博

書誌事項

タイトル別名

• Equilibrium Phosphorus Distribution between CaO-saturated Fe<SUB><I>t</I></SUB>O-CaO-P<SUB>2</SUB>O<SUB>5</SUB>-CaF<SUB>2</SUB> Slags and Liquid Iron
• 石灰飽和FetO-CaO-P2O5-CaF2系スラグと溶鉄間のりん分配平衡
• セッカイ ホウワ FetO CaO P2O5 CaF2ケイ スラグ ト ヨウテ

抄録

Equilibrium phosphorus distribution between Fe_tO-CaO-P₂O₅-CaF₂ slags and liquid iron has been studied at 1600°C under a CaO-saturated condition. The results are summarized as follows, <BR>(1) Increase of P₂O₅ content in CaO-saturated Fe_tO-CaO-P₂O₅ slags contributes to an increase of the activity coefficient of iron oxide, γ_FetO and also a slight increase of the ratio (Fe³⁺/Fe²⁺), but decreases the activity coefficient, γ_P<SUB>2O₅</SUB>.<BR>(2) For slags containing approximately 10 mass% P₂O₅, an addition of CaF₂ contributes to a decrease of the γ_P<SUB>2O₅</SUB> as follows, logγ_P<SUB>2O₅</SUB>=2.52N_Fe<SUB>tO</SUB>-1.32N_CaF<SUB>2</SUB>-19.4<BR>The addition of CaF₂ also increases the γ_Fe<SUB>tO</SUB> and the ratio (Fe³⁺/Fe²⁺). It suggests that CaF₂ in molten slags behaves as a basic component.<BR>(3) For slags having 10 mass% P₂O₅, most suitable slags for the dephosphorization are those containing 40-50 mass% CaF₂.

収録刊行物

• 鉄と鋼

  鉄と鋼 78 (4), 557-563, 1992

  一般社団法人 日本鉄鋼協会

キーワード

• CaO-saturated slags
• dephosphorization
• molten iron
• effect of CaF<SUB>2</SUB>
• activity coefficient of P<SUB>2</SUB>O<SUB>5</SUB>

詳細情報

• CRID: 1390282680128533248
• NII論文ID: 110001481102
• NII書誌ID: AN00151251
• DOI: 10.2355/tetsutohagane1955.78.4_557
• ISSN: 18832954
• ISSN: 00211575
• NDL書誌ID: 3759641
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3759641
• Web Site: https://www.jstage.jst.go.jp/article/tetsutohagane1955/78/4/78_4_557/_pdf
• データソース種別:
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  • NDL
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