Integration of partial oxidation process and direct reduction re

Details Integration of partial oxidation process and direct reduction re Integration of partial oxidation process and direct reduction re

1998-02-06

2000-03-07

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75958, C21B 1300

Patent

active

060334568

ABSTRACT:
The present invention relates to an integrated process and apparatus for supplying at least a portion of, or substantially all, or all of the reducing gas feedstock to a reduction reactor, such as a reactor for the direct reduction of iron, wherein the reducing gas contacts a feed material at a mean operating gas pressure and effects reduction of the feed material to provide a reduced product. The integrated process includes the production of a hydrogen-rich gas by the partial oxidation of a hydrocarbonaceous feedstock to produce a hydrogen-rich gas, which can also be referred to as a synthesis gas or syngas. The synthesis gas is at a pressure substantially greater than the mean operating gas pressure in the reduction reactor. The synthesis gas is expanded to lower its pressure to substantially the mean operating gas pressure in the DRI reduction reactor to thereby form the reducing gas feedstock at the pressure conditions used for the DRI reaction. The lower pressure reducing gas mixture generated by the expansion is introduced into the DRI reactor as part or all of the reducing gas requirement for the direct reduction of iron.

REFERENCES:
patent: 5358696 (1994-10-01), Jahnke
patent: 5531424 (1996-07-01), Whipp
patent: 5744067 (1998-04-01), Jahnke

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