EP 1430159 A1 20040623 - METHOD FOR REDUCING A PARTICULATE MATERIAL CONTAINING IRON ORE
Title (en)
METHOD FOR REDUCING A PARTICULATE MATERIAL CONTAINING IRON ORE
Title (de)
VERFAHREN ZUR REDUKTION VON EISENERZHÄLTIGEM TEILCHENFÖRMIGEM MATERIAL
Title (fr)
PROCEDE DE REDUCTION D'UN MATERIAU PARTICULAIRE CONTENANT DU MINERAI DE FER
Publication
Application
Priority
- AT 0200254 W 20020828
- AT 15332001 A 20010927
Abstract (en)
[origin: WO03027332A1] The invention relates to a method for reducing particulate material containing iron ore, said method comprising at least two steps. According to the inventive method, reduction gas is guided through at least two reaction zones which are successively connected in series and are formed from moving particulate material, and the particulate material crosses the reaction zones in the reverse order in relation to the reduction gas. Said particulate material is heated in the first reaction zone and is reduced in the other reaction zone. In order to obtain a maximum pre-heating temperature without the formation of magnetite, the reduction gas supplied to the first reaction zone is conditioned in such a way that there is no reduction or almost no reduction, but that a pre-heating temperature for the particulate material is obtained, however, in the threshold range of the beginning of a reduction, either the oxidation degree of the reduction gas being increased and/or the temperature of the reduction gas being reduced. In the second reaction zone for the iron ore, a temperature of at least approximately 600 DEG C, preferably between 600 and 700 DEG C, especially between 620 and 660 DEG C, is set, and the material containing iron oxide is reduced to wuestite.
IPC 1-7
IPC 8 full level
C21B 13/00 (2006.01); C21B 13/06 (2006.01); C21B 13/14 (2006.01)
CPC (source: EP KR US)
C21B 13/00 (2013.01 - KR); C21B 13/0033 (2013.01 - EP US); Y02P 10/122 (2015.11 - EP US); Y02P 10/134 (2015.11 - EP US)
Citation (search report)
See references of WO 03027332A1
Designated contracting state (EPC)
AT DE GB IT NL
DOCDB simple family (publication)
WO 03027332 A1 20030403; AT 410803 B 20030825; AT A15332001 A 20021215; AU 2002331402 B2 20080529; CA 2465990 A1 20030403; CA 2465990 C 20120207; CN 1284866 C 20061115; CN 1558958 A 20041229; EG 23312 A 20041130; EP 1430159 A1 20040623; JP 2005502790 A 20050127; JP 4331605 B2 20090916; KR 20040033073 A 20040417; MX PA04002778 A 20040629; US 2004237718 A1 20041202; US 2007245853 A1 20071025; US 7597739 B2 20091006; ZA 200402384 B 20050629
DOCDB simple family (application)
AT 0200254 W 20020828; AT 15332001 A 20010927; AU 2002331402 A 20020828; CA 2465990 A 20020828; CN 02818969 A 20020828; EG 2002091060 A 20020925; EP 02766919 A 20020828; JP 2003530897 A 20020828; KR 20047004541 A 20020828; MX PA04002778 A 20020828; US 81314002 A 20020828; US 82074907 A 20070620; ZA 200402384 A 20040326