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ホットストリップミルにおける制御冷却とその設備

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.10 (1978) No.1

ホットストリップミルにおける制御冷却とその設備

Device and System for Controlled Cooling on Hot Strip Mill

三宅 祐史(Yushi Miyake) 西出 輝幸(Teruyuki Nishide) 守谷 正一(Shoichi Moriya) 池永 孝雄(Takao Ikenaga) 井上 利夫(Toshio Inoue) 高木 清(Kiyoshi Takagi) 要旨 : 水島製鉄所のホットストリップミルにおいて,制御冷却の適用による品質向上とミルの生 産能力増強に対処するため,ストリップ冷却設備の改善と制御冷却の実施について検討し た。実験の結果,ラミナーフローは実験室同様実機においても優れていることが確認され た。冷却能力はReynolds 数の関数として精度よく表現できる。改造された冷却装置は水流 が安定しており,ストリップ両サイドの水量を減らした理想的な流量分布を示す。新たに 作成したモデル式は精度が良く,制御冷却のオンライン化に成功した。 Synopsis :

In order to achieve a better strip quality and a higher mill productivity of the hot strip mill at Mizushima Works, study was made on the introduction of controlled cooling system and the improvement of water cooling device. As a result, the laminar flow cooling found to be very effective at the mill as well as in the laboratory. The heat flux is well expressed as a function of the Reynolds number. The laminar flow is made very stable by the new cooling device, with the distribution of flow rate out of the cooling header so improved as to be low at both ends, serving for a uniform temperature of strip. The new mathematical model gives a good estimation of cooling effect and has well contributed to the application of the new cooling system.

(c)JFE Steel Corporation, 2003

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