Method for the direct reduction of iron using gas from coal

Details Method for the direct reduction of iron using gas from coal Method for the direct reduction of iron using gas from coal

1979-06-12

1980-09-30

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 91, C21B 1302

Patent

active

042253403

ABSTRACT:
A method for the direct reduction of iron in which a fossil fuel is gasified to produce a hot gas which is tempered with a cool spent top gas from a reduction furnace, reacted with carbon to upgrade the hot gas in reducing potential, and desulfurized by reaction with lime in a first shaft furnace to form a hot reducing gas. The hot reducing gas is utilized as the reductant in a counterflow shaft reduction furnace and the spent reducing gas is recycled as tempering gas for the hot gas from the hot gasifier.

REFERENCES:
patent: 3853538 (1974-12-01), Nemeth
patent: 4046555 (1977-09-01), Lange

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