EP 2097505 B1 20160810 - METHOD FOR PRODUCING PIG-IRON BASED STAINLESS STEEL WITHOUT USING A SUPPLY OF ELECTRICAL ENERGY
Title (en)
METHOD FOR PRODUCING PIG-IRON BASED STAINLESS STEEL WITHOUT USING A SUPPLY OF ELECTRICAL ENERGY
Title (de)
VERFAHREN ZUR ROSTFREISTAHLERZEUGUNG OHNE ELEKTRISCHE ENERGIEZUFUHR AUF DER BASIS VON ROHEISEN
Title (fr)
PROCÉDÉ POUR PRODUIRE DE LA FONTE BRUTE À BASE D'ACIER INOXYDABLE SANS UTILISER DE l'ÉNÉRGIE ÉLECTRIQUE
Publication
Application
Priority
- EP 2007010012 W 20071120
- DE 102006056672 A 20061130
Abstract (en)
[origin: CA2671074A1] The aim of the invention is to produce stainless steel for all stainless steel products both in the austenitic and the ferritic range, based on liqui d pig-iron and FeCr solids, without using a supply of electrical energy. Acc ording to the invention, the liquid pig-iron, after being pre-treated in a b last furnace (1), is subjected to a DDD treatment (dephosphorisation, desili conisation and desulphuration), is heated, finished or alloyed and deoxidate d. The quantity of slag-free liquid pig-iron that has been pre-treated in th e blast furnace (1) is separated and introduced into two classic "twin" AOD- L converters (2, 3), where the required chemical process steps (of the DDD t reatment and of the heating, decarburisation and alloying stages) take place in parallel contrary processes using autogenous chemical energy, the DDD tr eatment being carried out first in the first twin AOD-L converter (2) and th e decarburisation being carried out first in the second twin AOD-L converter (3).
IPC 8 full level
C12C 5/00 (2006.01); C21C 7/06 (2006.01); C21C 7/068 (2006.01)
CPC (source: EP KR US)
C21C 5/005 (2013.01 - EP US); C21C 7/00 (2013.01 - KR); C21C 7/06 (2013.01 - EP KR US); C21C 7/068 (2013.01 - KR); C21C 7/0685 (2013.01 - EP US); C21C 2300/08 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102006056672 A1 20080605; CA 2671074 A1 20080605; CA 2671074 C 20110920; CN 101541941 A 20090923; CN 101541941 B 20140813; EP 2097505 A1 20090909; EP 2097505 B1 20160810; ES 2602303 T3 20170220; JP 2010511100 A 20100408; JP 5415275 B2 20140212; KR 101123038 B1 20120321; KR 20090060353 A 20090611; US 2010011909 A1 20100121; US 2012175828 A1 20120712; US 8430945 B2 20130430; US 8765051 B2 20140701; WO 2008064797 A1 20080605
DOCDB simple family (application)
DE 102006056672 A 20061130; CA 2671074 A 20071120; CN 200780043801 A 20071120; EP 07856191 A 20071120; EP 2007010012 W 20071120; ES 07856191 T 20071120; JP 2009538619 A 20071120; KR 20097008208 A 20071120; US 201213428854 A 20120323; US 31288207 A 20071120