Development of a Novel Degassing Process Consisting with Single Large Immersion Snorkel and a Bottom Bubbling Ladle

Shin-ya Kitamura; Hiroyuki Aoki; Ken-ichiro Miyamoto; Hitoshi Furuta; Kosuke Yamashita; Kimitoshi Yonezawa

doi:10.2355/isijinternational.40.455

Shin-ya Kitamura, Hiroyuki Aoki, Ken-ichiro Miyamoto, Hitoshi Furuta, Kosuke Yamashita, Kimitoshi Yonezawa

著者情報

キーワード: vacuum degasser, decarburization, reaction rate, surface reaction, bubble activated surface, ultra-low carbon steel

ジャーナルフリー

2000 年 40 巻 5 号 p. 455-459

DOI https://doi.org/10.2355/isijinternational.40.455

詳細

抄録

A novel vacuum degassing process consisting of a large immersion snorkel and a bottom bubbling ladle has been invented for the efficient production of ultra-low carbon steel. This process has been confirmed by industrial scale test using 175 and 350 t ladle and named REDA (Revolutionary degassing activator). The carbon content reaches 10 ppm in 15 to 20 min treatment, and decreases to 4 ppm without any stagnation. As REDA has a wide bubble activated surface area and a deep injection position, relatively low gas flow rate is necessary to produce ultra-low carbon steel efficiently.

責任著者(Corresponding author)

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