Method of direct reduction of iron ores

Details Method of direct reduction of iron ores Method of direct reduction of iron ores

1974-07-16

1976-04-06

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C21B 1302

Patent

active

039486460

ABSTRACT:
The direct reduction of iron ore, e.g., in a shaft furnace, uses a pair of reducing-gas generating reformers which are alternately heated and functionally interchanged to produce the reducing gas. Downstream of each of the reformers is an air-preheating heat exchanger and between both reformers and the direct-reduction furnace there is provided a buffer heat exchanger. The combination reduces the fluctuations of the reducing-gas temperature at the inlet to the direct-reduction furnace and is able to maintain a reducing-gas temperature close to the desirable maximum for effective reduction.

REFERENCES:
patent: 3607225 (1971-09-01), Hatarescu et al.

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