Metallurgical pouring vessels
AssigneeFoseco International Limited
InventorsNorman E. Rogers, Liam Cullen
Life of this patent
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Abstract
A method and product improve the positioning of loose anti-skulling material in the outlet nozzle zone of a metallurgical pouring vessel. The formation of skull in the outlet nozzle zone of a metallurgical pouring vessel is inhibited by positioning in the outlet nozzle zone an elongated container containing loose anti-skulling material, the container being formed of an intumescent material so that when heated it expands to fill the gap between itself and the walls of the nozzle and releases the anti-skulling material.
Claims21
A container, comprising:
- at least one structural container wall for containing an anti-skulling material therein, said at least one structural wall being formed of the following composition in percentages by weight:
- ______________________________________ expandable perlite 30-85 inorganic binder 10-70 organic binder 0-30 inorganic fibrous material 0-60 ______________________________________
- so that the container walls are intumescent and will expand upon heating to release anti-skulling material therein;
- and
- wherein said container walls define a volume large enough to contain enough loose anti-skulling material to adequately fill the outlet nozzle zone of a metallurgical pouring vessel, having an outlet nozzle with a bore, with which the container is used.
A container, comprising:
- at least one structural container wall for containing an anti-skulling material therein, all structural walls formed of a unitary composition of intumescent material, so that said structural walls will expand upon heating to release loose material contained therein;
- and
- wherein said at least one container structural wall defines a volume large enough to contain enough loose anti-skulling material to adequately fill the outlet nozzle zone of a metallurgical pouring vessel having an outlet nozzle with a bore with which the container is used.
A method of inhibiting the formation of skull in the outlet nozzle zone of a metallurgical pouring vessel having an outlet nozzle with a bore, comprising the steps of:
- (a) providing a container comprising at least one structural container wall for containing an anti-skulling material therein, all structural walls formed of a unitary composition of material intumescent material, so that all structural walls will expand upon heating to release loose material contained therein;
- (b) filling the container with loose anti-skulling material;
- (c) placing the container in the outlet nozzle zone of the vessel to extend along the bore of the nozzle, leaving a gap between the container and the walls of the nozzle defining the bore;
- and
- (d) heating the container so that it expands to fill the gap, and release the anti-skulling material to adequately fill the outlet nozzle with anti-skulling material.
Dependencies are inferred from the claim text.