Method for operating blast furnace and method for manufacturing molten iron

Provided is a method for operating a blast furnace, said method including the following steps: a first step in which a coke charging amount is adjusted while a furnace-top temperature (Ttop) is monitored; a second step in which a pulverized-coal injection amount is adjusted while an intra-furnace su...

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Bibliographic Details
Main Authors ICHIKAWA HIROSHI, TOMIZAKI MAKOTO, OSAWA YASUYUKI, HAYASHI TAKUFUMI
Format Patent
LanguageEnglish
Published 15.07.2015
Subjects
CHEMISTRY
MANUFACTURE OF IRON OR STEEL
METALLURGY
METALLURGY OF IRON
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Summary:Provided is a method for operating a blast furnace, said method including the following steps: a first step in which a coke charging amount is adjusted while a furnace-top temperature (Ttop) is monitored; a second step in which a pulverized-coal injection amount is adjusted while an intra-furnace superficial gas flow rate (u) and the furnace-top temperature (Ttop) are monitored; a third step in which the oxygen-enrichment ratio of oxygen-enriched air is adjusted while a tuyere combustion temperature (Tf) and the furnace-top temperature (Ttop) are monitored; and a fourth step in which, in accordance with the intra-furnace superficial gas flow rate (u), it is determined whether or not an oxygen-enriched-air injection amount needs to be adjusted..
Bibliography:Application Number: CN2013859105