Process for heat hardening

Details Process for heat hardening Process for heat hardening

1975-12-24

1977-04-12

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 26, 75 35, 75 91, C21B 1302

Patent

active

040173054

ABSTRACT:
A method is disclosed for reducing iron ore wherein spent reducing gas may be used as fuel in a reformer, and a portion of the reformer product is used as cooling gas in the bottom portion of the shaft furnace to lower the temperature of the reduced product in a controlled manner whereby the product is rendered more stable and thereby more suitable for storage and shipment.

REFERENCES:
patent: 3160498 (1964-12-01), Olt et al.
patent: 3850616 (1974-11-01), Cruse, Jr.

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