EP 4083235 A4 20230705 - METHOD FOR CHARGING RAW MATERIAL INTO BLAST FURNACE
Title (en)
METHOD FOR CHARGING RAW MATERIAL INTO BLAST FURNACE
Title (de)
VERFAHREN ZUM BESCHICKEN EINES HOCHOFENS MIT ROHMATERIAL
Title (fr)
PROCÉDÉ POUR CHARGER UNE MATIÈRE PREMIÈRE DANS UN HAUT-FOURNEAU
Publication
Application
Priority
- JP 2020012083 A 20200129
- JP 2020044357 W 20201127
Abstract (en)
[origin: EP4083235A1] Provided is a method for charging raw material into a blast furnace which enables the formation of coke-mixed ore layers for securing gas permeability in the furnace and maintaining high reduction reactivity.The method for charging raw material into a blast furnace in which a mixture of ore and mixing coke is charged into the blast furnace in two or more separated batches by using a bell-less charging equipment with a charging chute, includes classifying the ore into coarse grain ore and fine grain ore having a smaller average grain diameter than the coarse grain ore, mixing the coarse grain ore with the mixing coke to prepare coke-mixed coarse grain ore, and mixing the fine grain ore with the mixing coke to prepare coke-mixed fine grain ore; and charging, at least in a first batch, the entirety or a part of the coke-mixed coarse grain ore into the blast furnace by tilting the charging chute from a position closer to a center of the blast furnace than a midpoint between the center of the blast furnace and a wall of the blast furnace in a radial direction of the blast furnace toward the wall of the blast furnace.
IPC 8 full level
CPC (source: EP KR)
C21B 5/003 (2013.01 - EP KR); C21B 5/007 (2013.01 - EP KR); C21B 5/008 (2013.01 - EP KR); C21B 7/18 (2013.01 - KR); C21B 7/20 (2013.01 - EP)
Citation (search report)
- [X] JP S5562106 A 19800510 - NIPPON STEEL CORP
- [X] JP S60208404 A 19851021 - KAWASAKI STEEL CO
- [A] JP S63140006 A 19880611 - KAWASAKI STEEL CO
- See references of WO 2021152989A1
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 4083235 A1 20221102; EP 4083235 A4 20230705; BR 112022014972 A2 20220920; CN 115023508 A 20220906; CN 115023508 B 20230718; JP 6885528 B1 20210616; JP WO2021152989 A1 20210805; KR 20220119154 A 20220826
DOCDB simple family (application)
EP 20916867 A 20201127; BR 112022014972 A 20201127; CN 202080094945 A 20201127; JP 2021508006 A 20201127; KR 20227026245 A 20201127