Direct-reduction process for directly reducing particulate iron-

Details Direct-reduction process for directly reducing particulate iron- Direct-reduction process for directly reducing particulate iron-

1994-11-09

1995-08-08

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75450, 266156, 266172, C22B 514

Patent

active

054395046

ABSTRACT:
In a process for the direct reduction of particulate iron-oxide-containing material by the fluidized bed method, reformed gas is mixed with top gas forming in the direct reduction of the iron-oxide-containing material and is fed to a fluidized-bed reduction zone as a reducing gas. To lower the energy demand and utilizing the potential of the reducing gas, both the top gas and the reformed gas are subjected to CO.sub.2 scrubbing and the reducing gas formed by mixing top gas with reformed gas is adjusted to an H.sub.2 content ranging between 45 and 75%, preferably between 50 and 65%, and to a CO content ranging between 10 and 20%.

REFERENCES:
patent: 2752234 (1956-06-01), Shipley
patent: 3193378 (1965-07-01), Peet
patent: 5082251 (1992-01-01), Whipp

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