Method and device for producing molten iron

Details Method and device for producing molten iron Method and device for producing molten iron

C - Chemistry, Metallurgy

21

B

C21B 13/00 (2006.01) C21B 13/12 (2006.01) C21B 13/14 (2006.01) C21C 5/52 (2006.01) F27B 3/08 (2006.01) F27B 3/24 (2006.01) F27D 11/08 (2006.01) F27D 99/00 (2010.01) F27B 3/12 (2006.01) F27B 3/18 (2006.01) F27B 3/19 (2006.01) F27D 3/15 (2006.01) F27D 9/00 (2006.01)

Patent

CA 2402827

A method capable of suppressing damages to furnace wall refractories in a melting furnace and making the working life of them longer and a technique capable of obtaining a molten iron with homogenized composition while keeping a high productivity upon arc heating a pre- reducing iron in a melting furnace to obtain a molten iron, the method comprising supplying a pre-reducing iron to a stationary non-tilting type melting furnace and melting the iron by an arc heating mainly composed of radiation heating, the melting being performed while keeping a refractory wearing index RF represented by the following equation at 400 MWV/m2 or less. RF = P x E/L2 [wherein RF represents the refractory wearing index (MWV/m2); P represents an arc power for one phase (MW); E represents an arc voltage (V); and L represents the shortest distance between the electrode side surface of a tip within an arc heating furnace and a furnace wall inner surface (m).] 30

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