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KAWASAKI STEEL TECHNICAL REPORT
No.1 ( September 1980 )

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Facilities and Operation of No.6 Blast Furnace at Chiba Works

Junsaku Kurihara, Shigeyuki Hashizume, Hiromitsu Takahashi, Hironari Marushima, Kazuo Okumura, Hiroyasu Takahashi
Synopsis :
Chiba No.6 blast furnace (4500m3 inner volume and 14.1m hearth diameter), one of the largest furnaces with bell-less top, was blown in on June 17, 1977. It was designed to get a stable yet flexible operation on the basis of iron-making experiences at Chiba and Mizushima Works. Effective control of gas distribution in the furnace by the full use of the bell-less top brought about a successful starting-up and rating-up operations and resulted in attaining high productivity (10 000t/d) and low fuel consumption (418.4kg/t). Design and operation of the furnace are discussed with a particular reference to bell- less top and burden distribution.
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