Patent ID: 7910050

Claim:
Stopper for a metallurgical melting pot with the following characteristic features: a) a rod shaped body ( 10 ) of at least one refractory ceramic material with a first upper end and a second lower end ( 14 ), b) a blind aperture ( 12 ) extends from the first end in the axial direction of the body ( 10 ) in the direction towards the second end ( 14 ), c) the aperture ( 12 ) ends at a bottom ( 16 ) at a distance to the second end ( 14 ) of the body ( 10 ), d) a gas discharge channel ( 20 ) connects the aperture ( 12 ) with a surface section in the area of the second end ( 14 ) of the body ( 10 ), e) the gas discharge channel ( 20 ) has a cross-sectional area which is smaller than the cross-sectional area of the aperture ( 12 ), f) a packing ( 24 ) extends over part of the aperture ( 12 )—viewed in the axial direction of the body ( 10 ), g) at least one gas channel ( 26 ) extends through the packing ( 24 ) or between the packing ( 24 ) and the body ( 10 ), which gas channel ( 26 ) connects the aperture ( 12 ) with the gas discharge channel ( 20 ) to allow a gas flowing therethrough, h) at least one gas channel ( 26 ) has a length which is greater than the shortest distance between its discharge apertures situated at its ends to adjust flow resistance of the gas flowing within the stopper.