Crystallization of CaO-SiO_2-TiO_2 Slag as a Candidate for Fluorine Free Mold Flux

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概要

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• 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.

• 社団法人 日本鉄鋼協会の論文
• 2006-03-15

著者

• NAGATA Kazuhiro

  Department of Chemistry and Materials Science, Tokyo Institute of Technology

• Nagata Kazuhiro

  Department Of Chemistry And Materials Science Tokyo Institute Of Technology

• NAKADA Hideko

  Department of Chemistry and Materials Science, Tokyo Institute of Technology

• Nakada Hideko

  Department Of Chemistry And Materials Science Tokyo Institute Of Technology

• Nagata Kazuhiro

  Department Of Cell Biology Chest Disease Research Institute Kyoto University

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