Smelting reduction process using reducing gas generated in preco

Details Smelting reduction process using reducing gas generated in preco Smelting reduction process using reducing gas generated in preco

1989-01-27

1990-09-18

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75532, 75502, C21B 1108

Patent

active

049575457

ABSTRACT:
Described herein is a smelting reduction process for smelting and reducing an iron oxide material by introducing same into a smelting reduction furnace together with a solid carbonaceous material, a fluxing agent and an oxygen-containing gas, process comprising: subjecting part or all of the solid carbonaceous material to primary combustion using an oxygen-containing gas with an oxygen content corresponding to a theoretical air ratio of 0.4 to 0.9: separating the resulting reducing gas from combustion residue of the solid carbonaceous material; and introducing the reducing gas into a smelting reduction furnace to effect secondary combustion with supply of a separately introduced oxygen-containing gas for smelting and reducing said iron material.

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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