Direct reduction process for producing metallic iron

Details Direct reduction process for producing metallic iron Direct reduction process for producing metallic iron

1980-09-11

1982-09-07

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

266156, C21B 1302

Patent

active

043482260

ABSTRACT:
A process for the direct reduction of iron oxide by blowing into a reduction furnace a reducing gas which is prepared by reforming a mixture of a reduction furnace exhaust gas and a gas mainly composed of methane, which comprises the steps of dividing the gas mainly composed of methane into two branch streams, mixing the first branch stream gas with a part of the reduction furnace exhaust gas and supplying the resulting mixture to the externally heated reformer furnace, to produce a high-temperature reformed gas; mixing the second branch stream gas with said high-temperature reformed gas and during the course to the reduction furnace, subjecting the mixture to endothermic reforming reactions in an after-reactor without external heating, utilizing the sensible heat of the high-temperature mixed gas, controlling the self-reforming reactions so as to lower the temperature and simultaneously adjust the composition of the high-temperature mixed gas, and blowing the reducing gas obtained into the reduction furnace. Effective use of the sensible heat can be achieved.

REFERENCES:
patent: 4048091 (1977-09-01), Barnaba
patent: 4099963 (1978-07-01), MacKay
patent: 4268303 (1981-05-01), Kaneko et al.

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