予備処理溶銑の脱炭プロセスにおける新吹錬法の検討

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タイトル別名
  • A Study on the New Blowing Method in the Decarburization Process of Pretreated Hot Metal
  • ヨビ ショリ ヨウセン ノ ダッタン プロセス ニ オケル シン スイレンホウ

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抄録

Decarburization of pretreated hot metal with less slag was studied by use of a 10 t ladle type travelling furnace based on a new idea. The characteristics of refining and the mechanism of post combustion of off gas were discussed.<BR>(1) In spite of deep bath (L0/D= 1.0) in the furnace, molten steel was not overoxidized in the case that the flow rate of argon blown from the bottom was more than 0.05 Nm3/min·t with super soft oxygen top blowing (L≅100 mm).<BR>(2) In this method, the post combustion ratio (CO2/(CO+CO2)) was very high, so the high temperature rising, almost 200°C/%C, was obtained.This decarburization furnace had large flexibility for heat balance.<BR>(3) On post combustion, the parameter K (=(ΣiSi+αΣjSj')×3600/(FO2+ FO2')) was proposed and the mechanism could be explained by this parameter K on this ladle type furnace and the conventional top and bottom blowing converter.

収録刊行物

  • 鉄と鋼

    鉄と鋼 73 (6), 645-652, 1987

    一般社団法人 日本鉄鋼協会

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