Global Patent Index - EP 1029092 A1

EP 1029092 A1 2000-08-23 - METHOD FOR PRODUCING DIRECTLY-REDUCED IRON, LIQUID PIG IRON AND STEEL

Title (en)

METHOD FOR PRODUCING DIRECTLY-REDUCED IRON, LIQUID PIG IRON AND STEEL

Title (de)

VERFAHREN ZUR HERSTELLUNG VON DIREKT REDUZIERTEM EISEN, FLÜSSIGEM ROHEISEN UND STAHL

Title (fr)

PROCEDE POUR PRODUIRE DU FER DE REDUCTION DIRECTE, DE LA FONTE BRUTE LIQUIDE ET DE L'ACIER

Publication

EP 1029092 A1 (DE)

Application

EP 98954449 A

Priority

  • AT 190497 A
  • EP 9806792 W

Abstract (en)

[origin: WO9924627A1] According to the inventive method for producing directly-reduced iron, liquid pig iron and steel, input materials made up of iron ore, preferably in lump and/or pellet form and optionally, aggregates are directly reduced to sponge iron in a first reduction area. The sponge iron is melted into liquid pig iron in a melt down-gasification area, carbon carrier substances and oxygen-containing gas being added, and a reduction gas is produced. After waste gas cleaning, the reduction gas is introduced into the first reduction area, reacted and drawn off as top gas. The top gas is subjected to a waste gas cleaning process and optionally conveyed to an additional reduction area for direct reduction of iron ore to sponge iron, reacted with the iron ore, drawn off as export gas and subjected to waste gas cleaning again. The liquid pig iron and optionally the sponge iron from the additional reduction area are introduced into a steel production process, especially a steel production process carried out using the electrosteel technique, the waste gases from the steel production process being cleaned. The invention also relates to a device for carrying out this method.

IPC 1-7 (main, further and additional classification)

C22B 7/02; C21B 13/14

IPC 8 full level (invention and additional information)

C04B 7/38 (2006.01); C21B 13/14 (2006.01); C21C 5/56 (2006.01); C22B 1/248 (2006.01); C22B 7/02 (2006.01)

CPC (invention and additional information)

C21B 13/002 (2013.01); C21B 13/14 (2013.01); C21C 5/56 (2013.01); C22B 7/02 (2013.01); C21B 2100/282 (2017.05); C21B 2100/44 (2017.05); Y02P 10/122 (2015.11); Y02P 10/136 (2015.11); Y02P 10/212 (2015.11)

Designated contracting state (EPC)

BE DE FR GB IT LU NL SE

EPO simple patent family

WO 9924627 A1 19990520; AT 406272 B 20000327; AT A190497 A 19990815; AU 1155999 A 19990531; AU 751205 B2 20020808; BR 9813200 A 20000829; CA 2309606 A1 19990520; CN 1267568 C 20060802; CN 1278871 A 20010103; CZ 20001652 A3 20020116; EP 1029092 A1 20000823; ID 24503 A 20000720; JP 2001522938 A 20011120; PL 340539 A1 20010212; SK 6682000 A3 20001107; TR 200001283 T2 20010521; TW 474995 B 20020201; US 6395052 B1 20020528; ZA 9810208 B 19990528

INPADOC legal status


2006-01-11 [18R] REFUSED

- Effective date: 20051121

2004-06-30 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH & CO.

2004-05-06 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH

2001-05-02 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010321

2000-08-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000413

2000-08-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE FR GB IT LU NL SE