Process for the production of liquid pig iron or liquid intermediate products of steel

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United States of America Patent

PATENT NO 6251162
SERIAL NO

09125869

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a method for producing liquid pig iron or liquid steel pre-products from charging substances comprising iron ore, preferably in lumps or pellets, and optionally fluxes. The charging substances are directly reduced to sponge iron in a reduction zone (12) and the sponge iron is melted in a melt-down gasifying zone (8) under the supply of carbon carriers and oxygen-containing gas. CO-and H.sub.2 -containing gas is introduced into the reduction zone (12) and is reacted there. An export gas is withdrawn and conducted to a consumer (20). The export gas is subjected to CO.sub.2 removal or partial combustion and the resulting gas with CO.sub.2 is introduced back into the reduction process. This is done to keep down the carbon carriers having high portion of C.sub.fix as well as consumption of O.sub.2. A highly CO.sub.2 -containing gas having a CO.sub.2 content far in excess of the CO.sub.2 content of the export gas, preferably exceeding 40%, and having a CO content that is far below the CO content of the export gas is introduced into the melt-down gasifying zone (8).

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Patent Owner(s)

Patent OwnerAddress
DEUTSCHE VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH111 NEUSSER STRASSE D-4000 DUSSELDORF

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Diehl, Jorg Linz, AT 6 22
Eichberger, Ernst Pichl/Wels, AT 6 31
Reufer, Franz Dusseldorf, DE 4 18
Rosenfellner, Gerald St.Peter/Au, AT 29 42
Schrey, Gunter Linz, AT 11 35

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