Use of prereduced ore in a blast furnace

Details Use of prereduced ore in a blast furnace Use of prereduced ore in a blast furnace

C - Chemistry, Metallurgy

21

B

53/45

C21B 5/00 (2006.01)

Patent

CA 1155665

ABSTRACT OF THE DISCLOSURE An improved method for operating a blast furnace wherein a portion of the charge is prereduced iron ore with a relatively low metallization in the range of 75% to 90% and a relatively high carbon content in the range of 1.5% to 4.5% by weight. The composition of the sponge iron is select- ed so as to realize an increase in the production of pig iron and a decrease in the consumption of coke while simultaneous- ly maximizing the overall economy and efficiency of the blast furnace operation. In a preferred embodiment of the inven- tion at least 80% by weight of the carbon content in the sponge iron used as a portion of the charge to the blast fur- nace is in the form of ferric carbide.

350708

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