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川崎製鉄技報
KAWASAKI STEEL GIHO
Vol.14 (1982) No.2
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高炉の動特性検討のための数式モデル
A Dynamic One-Dimensional Simulation Model of Blast Furnace Process

久保 秀穂(Hideho Kubo) 西山 哲司(Tetsuji Nishiyama) 田口 整司(Seiji Taguchi)
要旨 :
高炉の動特性を検討する目的で,非定常高炉モデルを作成した。本モデルの特色は,位置と時間に関する偏微分方程式群を,特性曲線法によって,常微分化して数値積分することにより,時間的にも,高さでも,連続した解を得られることである。又,本モデルの検証のために,高炉のダイナミックスの最も顕著な場合として,千葉第3高炉の減尺空炉吹卸そ操業,千葉第5高炉の火入れ操業をとり上げ,モデルによる予測と,実績とを比較した結果,充分な妥当性を確認した。
Synopsis :
A dynamic one-dimensional simulation model of the blast furnace process was developed for purpose of clarifying the transient behavior of the furnace. For the simplification of the model, some assumptions were made as follows: (1) Indirect reduction, solution-loss reaction, and melting of metal and slag are taken into account. (2) The reaction rate of solution-loss is applied in the temperature range between 950℃ and 1250℃, and is equal to the rate of indirect reduction above 1250℃. (3) The melting rate is exclusively controlled by the rate of heat transfer. A set of partial dfferential equations formulated by applying mass and heat balances to the finite sections of the furnace were coverted into ordinary differential equations by means of the characteristics method, and integrated by Runge-Kutta-Gill metod. As the most dynamic case of the furnace operation, empty-blowing-out operation of Chiba No.3 BF and blowing-in operation of Chiba No.5 BF were simulated. The predictions were in good agreement with actual results.
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