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US 9,802,249 B2Granted
Ceramic refractory stopper
AssigneeRefractory Intellectual Property GmbH & Co. KG
InventorsGerald Nitzl, Arno Stranimaier, Hans-Jürgen Haslinger, Helmut Kaufmann
Life of this patent
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Abstract
The invention relates to a ceramic refractory stopper (a stopper device) for controlling a flow of molten metal at an outlet opening of a metallurgical vessel, such as a tundish.
Claims14
Ceramic refractory stopper, comprising
- a) a rod-shaped stopper body (12) defining a central longitudinal stopper axis (A) including:
- b) at least one fitting (16) for connecting a gas supply line (30), and
- c) 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, which second end defining a stopper head (12h), wherein
- d) a filling material is arranged within the gas channel (14) according to the following conditions:
- e) the filling material is a high temperature resistant and particulate material which is defined by solid parts and an open porosity, and arranged as a packed bed which extends along a distance (R) of the gas channel (14) being ≧25% of the total length (L) of the gas channel (14) and
- f) said solid parts of the high temperature resistant and particulate material infill between 10 and 90% by volume of the gas channel (14) along said respective distance (R).
3 more elements
Dependencies are inferred from the claim text.