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AssigneeKabushiki Kaisha Kobe Seiko Sho
InventorsAkihide Hikosaka, Tsuyoshi Mimura, Tomio Suzuki, Takeo Yoshigae, Shuzo Ito
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Described herein is a process for melting iron material in the production of molten iron, in which cold iron material such as scraps, cold pig iron or reduced iron is charged into a melting furnace, the process comprising: feeding a carbon-containing solid material into a precombustion vessel for primary combustion therein with supply of an oxygen-containing gas with an oxygen content corresponding to 0.4 to 0.9 of theoretical air ratio; separating combustion residues of the carbon-containing solid material from the resulting hot reducing gas; and introducing the reducing gas into the melting furnace for secondary combustion therein with supply of an oxygen-containing gas holding an oxygen concentration corresponding to 0.7 to 1.3 of theoretical air ratio in total with the oxygen-containing gas supplied to the precombustion furnace.
In a melting process for the production of molten iron wherein iron material, is charged into a melting furnace, the improvement in said process which comprises feeding a carbon-containing solid material along with a oxygen-containing gas, having an oxygen content corresponding to the air ratio of 0.4 to 0.9, into a precombustion vessel and effecting therein a primary combustion yielding a hot reducing gas containing combustion residues;
Dependencies are inferred from the claim text.