ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Analyses on Blast Furnace Raceway Formation by Micro Wave Reflection Gunned through Tuyere
Yoshiyuki MATSUIYasuhiro YAMAGUCHIMuneyoshi SAWAYAMAShinji KITANONobuyuki NAGAITakashi IMAI
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2005 Volume 45 Issue 10 Pages 1432-1438


The blast furnace raceway formation under the intensive coal injection by measurement of micro wave reflection gunned through a tuyere is discussed. As the flow rate of coke as the momentum of coke into raceway decreases by combustion of coal injected into tuyeres, the depth of raceway defined as the maximum position of micro wave reflection is easy to contract. It is expected that this new technology could detect the raceway collapse phenomena in short time and that the stability of raceway in coal injection is different from that in all coke operation. Finally the paper ends by summarizing the effect of raceway formation on unsteady phenomena forcing functional disorder on blast furnace performance of burden distribution for high productivity performance.

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© 2005 by The Iron and Steel Institute of Japan
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