METHOD FOR OPERATING BLAST FURNACE

摘要

Provided is a method for operating a blast furnace which makes it possible to drastically reduce CO2 emissions, and to stably produce pig iron over the long term using a commercial blast furnace. A method for operating a blast furnace into which iron ore and coke are inserted from the blast furnace top, and into which pulverized coal is blown from an ordinary tuyere, the method for operating a blast furnace being characterized in that: a gas containing hydrogen and/or a hydrocarbon is blown in from the ordinary tuyere along with the pulverized coal; and carbon dioxide and water vapor are removed from the furnace-top exhaust gas of the blast furnace, and the furnace-top exhaust gas is then blown into the furnace from a shaft-section tuyere.