CERAMIC REFRACTORY STOPPER

摘要

The invention relates to a ceramic refractory stopper, comprising a rod-shaped stopper body (12) defining a central longitudinal stopper axis (A) including at least one fitting (16) for connecting a gas supply line (30), and at least one gas channel (14) of a total length (L) within said stopper body (12), extending between an inlet section at a first end (12u) of the stopper body (12) and an outlet section in a free outer surface area (12o) at a second end of the stopper body defining a stopper head (12h). A high temperature resistant and particulate material (20) is arranged within the gas channel (14) according to the following conditions: the high temperature material is >1,000° C resistant and extends along a distance (R) of the gas channel (14) being >= 25% of the total length (L) of the gas channel (14); and solid parts of the high temperature resistant material infill between 10 and 90% by volume of the gas channel (14) along said respective distance (R).