BLAST FURNACE OPERATION METHOD
Gas permeability in a lower portion of a furnace by injecting pulverized iron ore from a tuyere is improved.An operation method for a blast furnace 1 according to the present invention includes: pulverizing coal to make pulverized coal, and pulverizing iron ore to make pulverized iron ore; and injec...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | Gas permeability in a lower portion of a furnace by injecting pulverized iron ore from a tuyere is improved.An operation method for a blast furnace 1 according to the present invention includes: pulverizing coal to make pulverized coal, and pulverizing iron ore to make pulverized iron ore; and injecting the pulverized coal and the pulverized iron ore from a tuyere 2, characterized in that a loss on ignition of the iron ore is greater than or equal to 9% by mass and less than or equal to 12% by mass, an injection rate of the pulverized coal is greater than or equal to 150 kg/tp, and an injection rate of the pulverized iron ore is greater than or equal to 2.5 kg/tp and less than or equal to 50.0 kg/tp. The iron ore and the coal are preferably pulverized together. |
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