Refractory lance assembly and refractory lance tube
AssigneeNational Research Council of Canada
InventorsAndré Moreau, André Hamel, Mohamad Sabsabi
Life of this patent
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Abstract
Described are various embodiments of a refractory lance assembly and a composite refractory lance. In one embodiment, a refractory lance assembly is provided that comprises: an immersion tube having an immersion tip immersible within a melt and an extension tube coupled at an opposed end thereof to form a longitudinally extended composite tube therewith defining an optical path therein, wherein said longitudinally extended composite tube is injectable, in use, with an inert gas to form and probe an immersed melt surface. The assembly further comprises a shroud longitudinally encasing the composite tube and injectable with inert gas to mitigate fluid contamination of the composite tube and immersed melt surface.
Claims20
A refractory lance assembly to be utilised with an optical sensing system to optically probe a melt, the refractory lance assembly comprising:
- an immersion tube having an immersion tip immersible within the melt and an extension tube coupled at an opposed end thereof to form a longitudinally extended composite tube defining an optical path therein for optical alignment with the optical sensing system, wherein said longitudinally extended composite tube is injectable, in use, with an inert gas to form an immersed melt surface within the melt via said immersion tip so to optically probe said immersed melt surface as exposed to said inert gas via said optical path, wherein said immersion tube is formed of a longitudinal sidewall that is continuous in that it has no slot, slit, nozzle, or opening extending through said immersion tip;
- and
- a shroud longitudinally encasing said longitudinally extended composite tube to define an encasing volume therebetween, wherein coupling of said extension tube with said opposed end of said immersion tube is encased within said encasing volume whereas said immersion tip extends longitudinally therefrom for immersion within the melt, wherein said encasing volume is injectable with said inert gas to mitigate fluid contamination of said longitudinally extended composite tube and immersed melt surface via said coupling.
A refractory lance tube to be utilised with an optical sensing system for optically probing a melt, comprising:
- an immersion tube having an immersion tip immersible within the melt, and an extension tube coupled at an opposed end thereof to form a longitudinally extended composite tube defining an optical path therein for optical alignment with the optical sensing system;
- wherein said longitudinally extended composite tube is injectable, in use, with an inert gas to form an immersed melt surface within the melt via said immersion tip so to optically probe said immersed melt surface as exposed to said inert gas via said optical path;
- wherein said immersion tube is at least partially manufactured of a non-porous ceramic, which is substantially resistant to corrosion and thermal shock at temperatures of at least 1500° C.;
- and
- wherein said immersion tube is formed of a longitudinal sidewall that is continuous in that it has no slot, slit, nozzle, or opening extending through said immersion tip.
Dependencies are inferred from the claim text.