Crystallization of CaO-SiO2-TiO2 Slag as a Candidate for Fluorine Free Mold Flux

• Nakada Hideko

  Department of Chemistry and Materials Science, Tokyo Institute of Technology

• Nagata Kazuhiro

  Department of Chemistry and Materials Science, Tokyo Institute of Technology

抄録

The time-temperature-transformation diagram (TTT diagram) of CaO–SiO₂–TiO₂ slag has been determined by using differential thermal analysis (DTA) in order to investigate the crystallization of the slag as a candidate for fluorine free mold flux. The incubation time of CaOSiO₂TiO₂ in CaO–SiO₂–TiO₂ slag is as small as that of cuspidine (3CaO₂SiO₂CaF₂) in commercial mold fluxes. This finding indicates that the CaOSiO₂TiO₂ crystallizes rapidly in the slag film between the mold and the steel in the continuous casting machine, similar to cuspidine in commercial mold fluxes. CaOSiO₂TiO₂ in CaO–SiO₂–TiO₂ slag is substituted for cuspidine in commercial mold fluxes. The thickness of the crystalline layer of CaOSiO₂TiO₂ is smaller than that of cuspidine. In order to improve the heat transfer control of CaO–SiO₂–TiO₂ slag, it is necessary to decrease the incubation time of CaOSiO₂TiO₂ at high temperature.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 46 (3), 441-449, 2006

  一般社団法人 日本鉄鋼協会

キーワード

• heat transfer control
• TTT diagram
• CaO–SiO₂–TiO₂ slag
• fluorine free mold flux

詳細情報

• CRID: 1390001206488109952
• NII論文ID: 10017618867
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.46.441
• COI: 1:CAS:528:DC%2BD28XktlGjtbY%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational/46/3/46_3_441/_pdf
• 本文言語コード: en
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• 抄録ライセンスフラグ: 使用不可