Method and furnace for production of liquid iron

Details Method and furnace for production of liquid iron Method and furnace for production of liquid iron

1991-02-19

1993-08-24

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

266157, 266162, 266212, C21B 1100

Patent

active

052384861

ABSTRACT:
This non-blast process for the production of pig iron, cast iron, steel melt and nearly pure iron is carried out in a single furnace based on a tank-type design. Said types of iron melt can be produced in such single furnace individually or simultaneously in different combinations. The furnace interior is divided into immediately adjacent side-by-side chambers, at least one being an ore reduction chamber and at least one being a secondary chamber. Ore introduced into the top of the ore reduction chamber moves downward to the bottom of this chamber and is at first converted into sponge iron, which, absorbing carbon, is then converted into iron-carbon alloy in the form of a flowable layer at temperatures close to its melting point at about 1150 degrees C. while said flowable layer is collected on the bottom. In the melting zone of the secondary chamber such flowable semifinished product is completely melted, producing pig iron. Then the resulting melt is transferred into at least one bounded discharge zone of the secondary chamber from where it is removed from the furnace. In modified forms of the invention, refining and/or mixing can be introduced in the secondary chamber to produce the other types of iron melt referred to hereinabove.

REFERENCES:
patent: 4566904 (1986-01-01), von Bogdandy et al.
patent: 4579588 (1986-04-01), van Langen
patent: 4857105 (1989-08-01), Hauk et al.
patent: 4877449 (1989-10-01), Khnikis
patent: 5060913 (1991-10-01), Reid
patent: 5064174 (1991-11-01), Lehto

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