Jfe Steel Corporation

Kota Moriya

Koichi Takahashi

Naoki Yamamoto

Akinori Murao

Sumito Ozawa

Nobuyuki Oyama

Koki Terui

Provided is a blast furnace operation method that enables lowering of the reducing agent ratio of a blast furnace. The blast furnace operation method includes injecting pulverized coal through tuyeres of a blast furnace. The method includes adjusting coal containing moisture and volatile matter to form adjusted pulverized coal having a specific surface area within a range of 2 m/g or more and 1000 m/g or less, a lower heating value of 27170 kJ/kg or more, and a volatile matter content within a range of 3 mass % or more and 25 mass % or less. The method further includes injecting, through the tuyeres of the blast furnace, pulverized coal in which the adjusted pulverized coal, in a mixing ratio of 10 mass % or more, is mixed.

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Tokyo, Japan

Kota Moriya