溶銑鍋でのソーダ灰による溶銑処理方式の最適化

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タイトル別名
  • Optimization of the Hot Metal Pretreatment Method in the Ladle by Use of Soda Ash
  • ヨウセンナベ デ ノ ソーダバイ ニヨル ヨウセン ショリ ホウシキ ノ サイ

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Process performances of various dephosphorization methods are compared in terms of their chemical reactions and other operational items.<BR>Among the various ladle hot metal treatments, (1) quick Na2CO3 top charge method, (2) Na2CO3 injection method, and (3) snorkel(specially designed lid) method are examined, and the following results are obtained:<BR>(i) Injection method is unfavorable for the stable operation, since it enlarges the slopping and hot metal temperature drop.<BR>(ii) In the Na2CO3 top charge method, treatment time can be shortened to the level of 15 to 20 min. (quick method)<BR>(iii) By the quick method, same dephosphorization is secured as the slow one, the desulfurization being greatly improved, and the unit refractory consumptions being reduced to the half.<BR>(iv) Snorkel is found to be beneficial, since it can increase the hot metal carrying capacities of the ladle and reduce the ladle lining wear and temperature drop of hot metal, keeping the dephosphorization and desulfurization same as the non-snorkel method.

収録刊行物

  • 鉄と鋼

    鉄と鋼 69 (15), 1849-1855, 1983

    一般社団法人 日本鉄鋼協会

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