Method for controlling the carbon content of directly reduced ir

Details Method for controlling the carbon content of directly reduced ir Method for controlling the carbon content of directly reduced ir

1975-09-22

1977-10-18

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 34, C21B 1302

Patent

active

040544443

ABSTRACT:
This invention relates to a method for controlling the carbon content of metallized iron pellets produced by the continuous direct reduction of iron oxide in a vertical shaft furnace with a reducing gas having a high hydrogen and carbon monoxide content. According to the method, in addition to the standard reducing gases introduced to the reducing zone, methane or methane-containing gas is introduced to the shaft furnace at specified locations beneath the reducing zone and, by controlling the conditions in the furnace, a proportion of the injected gas is reformed in the furnace to reducing gases.

REFERENCES:
patent: 2653088 (1953-09-01), Pike
patent: 3375098 (1968-03-01), Marshall
patent: 3901490 (1975-08-01), Kanbara et al.

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