Method and apparatus for producing direct reduced iron with impr

Details Method and apparatus for producing direct reduced iron with impr Method and apparatus for producing direct reduced iron with impr

1999-02-18

2000-02-22

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75495, 75505, 266155, C21B 1302

Patent

active

060275456

ABSTRACT:
A method and apparatus for producing DRI, prereduced materials, or the like, utilized in the steelmaking industry, where hydrogen contained in the gas stream purged from the reduction reactor is separated (preferably by means of a PSA system) and recycled to said reduction reactor. The productivity of the reduction plant is increased by using the separated hydrogen as a chemical reductant in the reactor, instead of using it as fuel. This is particularly useful in upgrading existing DRI production plants.

REFERENCES:
patent: 3661553 (1972-05-01), Frans
patent: 3853538 (1974-12-01), Nemeth
patent: 4260412 (1981-04-01), Summers et al.
patent: 4362554 (1982-12-01), Santen
patent: 4362555 (1982-12-01), Santen et al.
patent: 5043011 (1991-08-01), Hauk
patent: 5238487 (1993-08-01), Hauk et al.
patent: 5858057 (1999-01-01), Celada-Gonzalez et al.

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