Lower Fuel Rate Operation by a Large Blast Furnace Equipped with Bell-less Top

Autor:	Takanari Kawat, Kazuo Okumura, Hiromitsu Takahashi, Junsaku Kurihara, Hironari Marushima
Rok vydání:	1982
Předmět:	Engineering Utilization ratio Blast furnace Waste management business.industry Flow distribution Metals and Alloys General Engineering Coke Thermal load Condensed Matter Physics Tuyere Materials Chemistry Physical and Theoretical Chemistry business Monthly average
Zdroj:	Transactions of the Iron and Steel Institute of Japan. 22:243-252
ISSN:	1881-1183 0021-1583
DOI:	10.2355/isijinternational1966.22.243
Popis:	In June, 1977, No. 6 Blast Furnace at Chiba Works of Kawasaki Steel Corporation, was blown in as the largest bell-less top equipped furnace in Japan. Although troubles, such as tuyere bending and burning-out attributable to inappropriate gas flow distribution, were encountered at the initial stage, the results of a series of operational experiments were conducive to improving the in furnace conditions. Especially, the tests designed to determine the optimum charging sequence for coke and ore produced the following achievements:1) The CO gas utilization ratio (out of the top gas) improved to about 54%.2) No tuyere burn-outs since April, 1979.3) A considerable decrease in the thermal load on the furnace shell.Furthermore, very low fuel rates followed these improvements: a monthly average of 418.4kg/mt-h•m in March, 1980; and a yearly average of 436.1kg/mt-hm•m for the one year period from April, 1979 to March, 1980.
Databáze:	OpenAIRE
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