EP 3397779 A1 20181107 - METHOD OF PIG IRON PRODUCTION USING ROMELT LIQUID PHASE REDUCTION PROCESS
Title (en)
METHOD OF PIG IRON PRODUCTION USING ROMELT LIQUID PHASE REDUCTION PROCESS
Title (de)
VERFAHREN ZUR ROHEISENPRODUKTION MIT ROMELT-FLÜSSIGPHASEN-REDUKTIONSVERFAHREN
Title (fr)
PROCÉDÉ DE PRODUCTION DE FONTE BRUTE UTILISANT UN PROCESSUS DE RÉDUCTION EN PHASE LIQUIDE ROMELT
Publication
Application
Priority
- RU 2015156791 A 20151229
- RU 2016000194 W 20160406
Abstract (en)
[origin: WO2017116275A1] The invention relates to the pig iron production in the Romelt furnace. Simultaneous loading of iron containing materials, fluxes and >5 mm sized coal fractions into the liquid slag bath of the Romelt furnace through the top loading port. Bubbling of the liquid slag bath and initiation of coal combustion by supplying air/oxygen blowing gas to the bottom tuyeres. Oxidation of released CO and H2 by supplying oxygen to the top tuyeres. The combustion rate of the gases is maintained at 60-85% of the maximum possible rate by dividing coal into >5 mm and <5 mm fractions. The <5 mm coal fraction is crushed to <1 mm size and supplied to the liquid slag bath through the bottom tuyeres together with the air/oxygen blowing gas at a rate of 400-1000 m3 /m2 of furnace area at the bottom tuyere level. A heat flow of 3-6 MW/m2 of liquid slag bath area is provided from the combustion zone to the liquid slag bath. The invention provides reduction of iron loss with the slag and exclusion of uncontrolled boiling of a slag bath.
IPC 8 full level
C21B 11/00 (2006.01)
CPC (source: EA EP KR RU)
C21B 11/08 (2013.01 - EA EP KR); C21B 13/0013 (2013.01 - EA EP KR); C21B 13/008 (2013.01 - EA EP KR); C21B 13/10 (2013.01 - EA EP KR); C21C 5/56 (2013.01 - EA EP KR); C22B 7/02 (2013.01 - EA EP KR); C21B 11/00 (2013.01 - EA RU); Y02P 10/134 (2015.11 - EA EP KR); Y02P 10/20 (2015.11 - EA EP KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2017116275 A1 20170706; EA 033747 B1 20191121; EA 201800393 A1 20181228; EP 3397779 A1 20181107; EP 3397779 A4 20190731; KR 20180097739 A 20180831; RU 2618297 C1 20170503
DOCDB simple family (application)
RU 2016000194 W 20160406; EA 201800393 A 20160406; EP 16882176 A 20160406; KR 20187021655 A 20160406; RU 2015156791 A 20151229