Process for the reduction of iron mineral

Details Process for the reduction of iron mineral Process for the reduction of iron mineral

1975-06-30

1977-06-14

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 26, 75 34, 75 91, C21B 1302

Patent

active

040294960

ABSTRACT:
Iron minerals are reduced in solid state in a vertical shaft furnace by gases produced in the furnace fed at the top with a mixture of minerals and solid reducing material. A combustion gas including oxygen is injected at low velocity and in finely divided form in the medial part of the furnace. Combustion gases produced in the furnace transfer heat as determined by the combustion with oxygen and are removed at the top of the furnace and recycled to the bottom of the furnace. The amounts of materials, the amounts of gases aspirated and the amounts of oxygen are adjusted so that the gases and materials leaving the top of the furance and in the bottom of the furnace are at low temperature.

REFERENCES:
patent: 3427013 (1969-02-01), Cavanagh

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