Process for the continuous manufacture of steel

Details Process for the continuous manufacture of steel Process for the continuous manufacture of steel

1995-07-18

1998-05-05

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75501, C22B 514, C21B 1314

Patent

active

057468052

ABSTRACT:
Continuous steel making is carried out in an elongated approximately horizontal reactor by providing an iron-rich feed more than half of which is an iron-rich material containing a fine iron ore metallized by more than half of its weight to elemental iron by prereduction. The iron-rich feed and a carbonaceous material are smelted and the melt is covered by a slag layer. By submerged injection a carbonaceous material and a tonnage oxygen gas preferably of at least 95% by volume oxygen is introduced and a gas preferably of at least 95% by volume oxygen is introduced into the smelting zone without penetrating the slag layer. Moderate turbulence is introduced in the reactor bath and the iron layer and slag layer flow countercurrently with the iron flowing into a refining zone and the slag flowing from the refining zone into the smelting zone. Nitrogen-free oxygen is injected into the bath of the refining zone to form steel which can be withdrawn and gaseous products formed in the smelting and refining zones are removed at a discharge end of the smelting zone as an exhaust gas.

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