EP 3231878 A1 20171018 - BOTTOM-BLOWING PLUG
Title (en)
BOTTOM-BLOWING PLUG
Title (de)
SPÜLSTEIN
Title (fr)
BOUCHON À SOUFFLAGE INFÉRIEUR
Publication
Application
Priority
JP 2015005096 W 20151007
Abstract (en)
A bottom blowing plug to be attached to a large combined blowing converter and having a high durability. This plug has a plurality of through holes at a central portion of an upper surface of a plug body which intersects with a gas blow-in direction. When S u cm 2 is area of the upper surface and S o cm 2 is area of an opening group portion surrounded by centers of openings of outermost ones of the through holes, S o /S u ‰¤ 0.25 and S u ‰¥ 400 cm 2 . Density of the openings constituting the group of openings, which is expressed by the number of openings divided by the area S o of the opening group portion, is 0.6 to 3.9 opening/cm 2 .
IPC 8 full level
C21C 7/00 (2006.01); C21C 5/34 (2006.01); C21C 5/48 (2006.01); C21C 7/072 (2006.01)
CPC (source: EP KR)
C21C 5/34 (2013.01 - EP); C21C 5/35 (2013.01 - KR); C21C 5/4653 (2013.01 - KR); C21C 5/48 (2013.01 - EP); C21C 7/072 (2013.01 - 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)
EP 3231878 A1 20171018; EP 3231878 A4 20180509; EP 3231878 B1 20181226; BR 112016022757 A2 20180116; BR 112016022757 B1 20211214; CN 107075596 A 20170818; CN 107075596 B 20181002; KR 101828140 B1 20180209; KR 20170085616 A 20170725; WO 2017060937 A1 20170413
DOCDB simple family (application)
EP 15888078 A 20151007; BR 112016022757 A 20151007; CN 201580001518 A 20151007; JP 2015005096 W 20151007; KR 20157033034 A 20151007