Process for melting cold iron material

Details Process for melting cold iron material Process for melting cold iron material

1989-01-27

1990-03-13

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75445, 75 48, C21B 1100

Patent

active

049080598

ABSTRACT:
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.

REFERENCES:
patent: 2040651 (1936-05-01), Frankl
patent: 4220469 (1980-09-01), Tippmer
patent: 4309024 (1982-01-01), Lillybeck et al.
patent: 4381938 (1983-05-01), Claflin

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