EP 2857529 A4 20160224 - METHOD FOR CHARGING RAW MATERIAL INTO BELL-LESS BLAST FURNACE
Title (en)
METHOD FOR CHARGING RAW MATERIAL INTO BELL-LESS BLAST FURNACE
Title (de)
VERFAHREN ZUM LADEN VON ROHMATERIAL IN EINEN GLOCKENLOSEN HOCHOFEN
Title (fr)
PROCÉDÉ DE CHARGEMENT DE MATIÈRE PREMIÈRE DANS UN HAUT-FOURNEAU SANS ENTONNOIR DE COULÉE
Publication
Application
Priority
- JP 2012120631 A 20120528
- JP 2013001857 W 20130319
Abstract (en)
[origin: EP2857529A1] With respect to raw material charging from a furnace intermediate portion to a furnace wall, a coke batch (first charging batch 5a) is piled up such that a coke surface has a piled-up peak in a range of dimensionless furnace-opening radius of 0.6 to 0.8, and forms a raw material piled-up slope which is inclined toward a furnace center and toward the furnace wall; a mixture batch of ore and coke (third charging batch 5c) is charged such that its fall point of charging is on the furnace wall side from the piled-up peak of coke; and an ore batch (fourth charging batch 5d) is charged such that its fall point of charging is in a range of dimensionless furnace-opening radius of 0.5 to 0.9. This makes it possible to independently control and decrease O/C in the vicinity of the furnace wall without requiring a new ancillary facility, and to prevent formation of furnace wall deposits without significantly increasing reducing material ratio of the blast furnace. It is desirable that the charging amount of the mixture batch of ore and coke is less than that of the ore batch.
IPC 8 full level
CPC (source: EP KR)
C21B 5/00 (2013.01 - KR); C21B 5/008 (2013.01 - EP KR); C21B 7/20 (2013.01 - EP KR)
Citation (search report)
- [A] JP S6447803 A 19890222 - NIPPON STEEL CORP
- [A] JP S60258402 A 19851220 - SUMITOMO METAL IND
- [A] JP S62290809 A 19871217 - KOBE STEEL LTD
- See references of WO 2013179541A1
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
DOCDB simple family (publication)
EP 2857529 A1 20150408; EP 2857529 A4 20160224; CN 104364397 A 20150218; CN 104364397 B 20160817; IN 10251DEN2014 A 20150807; JP 5696814 B2 20150408; JP WO2013179541 A1 20160118; KR 101579031 B1 20151218; KR 20150009575 A 20150126; WO 2013179541 A1 20131205
DOCDB simple family (application)
EP 13797875 A 20130319; CN 201380028508 A 20130319; IN 10251DEN2014 A 20141202; JP 2013001857 W 20130319; JP 2014518235 A 20130319; KR 20147034414 A 20130319