Lance for repairing the lining of steelmaking vessels
AssigneePullman Berry Company
InventorsNicholas M. Rymarchyk, Jr., Leo L. Meinert
Life of this patent
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Abstract
A water-cooled lance is supported above the mouth of a steel-making vessel for vertical reciprocating movement and includes a slurry pipe which is rotatably positioned to spray repair material against the inner lining of the vessel, or to place a new lining on the interior of the vessel.
Claims25
In a steel-making apparatus combination comprising a vessel having an upper open mouth, an outer steel shell, an inner lining providing a hearth portion, and trunnion means on said vessel adapted to support the same for pivotal movement from a vertical operating position to a tilted discharge position, the improvement comprising,
- a lining repair lance including,
- a central slurry pipe,
- a discharge nozzle connected to a lower end of said slurry pipe including an opening for discharging slurry material horizontally while said vessel is disposed in said vertical operating position,
- first inner, second intermediate, and third outer pipes concentric with said slurry pipe and relatively horizontally spaced to provide vertically extending inner and outer water passages,
- said first inner pipe being spaced from said slurry pipe to provide an elongated swivel support chamber,
- a top adapter assembly supporting said first, second and third pipes,
- means supporting said slurry pipe relative to said first, second and third pipes for relative rotating movement,
- conduit means connected to said slurry pipe including tubular swiveling means for directing pressurized slurry materials to said slurry pipe.
- movable support means connected to said repair lance for moving the same relative to said mouth within said vessel for discharging slurry material against the inner lining of said vessel, and
- means associated with said top adapter assembly for rotating said discharge nozzle into selective areas within said vessel.
A slurry lance for spraying a slurry onto the inner refractory lining of a basic oxygen furance vessel for repairing said inner lining, said lance comprising:
- a slurry pipe having an upper end portion having a swivel connection for being rotatably connected to a slurry supply conduit and a lower end portion having a slurry spraying nozzle means;
- a lance cooling assembly having;
- a first inner pipe concentric with and radially outwardly spaced from said slurry pipe;
- a second intermediate pipe concentric with and radially outwardly spaced from said first inner pipe for forming a first fluid flow passage between said first and said second pipes;
- a third outer pipe concentric with and radially outwardly spaced from said second intermediate pipe for forming a second fluid flow passage between said second and said third pipes, said first and second fluid flow passages being in fluid flow communication for enabling a cooling fluid to flow through said first passage into said second passage;
- and,
- an adaptor assembly having a first bearing means adjacent an upper terminal end portion of said first inner pipe for rotatably supporting said slurry pipe in a fixed longitudinal position with respect to said cooling assembly, said adaptor assembly having an annular plate and said first inner pipe of said cooling assembly having an upper terminal end portion sealingly and longitudinally slidably engaged with said annular plate of said adaptor assembly whereby said first inner pipe can expand and contract longitudinally with respect to said annular plate of said adaptor assembly in response to temperature changes to relieve thermally induced stresses in said lance.
A lance for spraying slurry on the inner lining of a basic oxygen furnace vessel to repair said lining, said lance comprising, in combination:
- a slurry pipe having a first end portion and a second end portion, said first end portion having swivel means for placing said slurry pipe in fluid flow communication with a slurry supply conduit, said second end portion having removable nozzle means for spraying slurry from said slurry pipe;
- a cooling assembly surrounding, concentric with and radially outwardly spaced from said slurry pipe, said cooling assembly having a first end portion and a second end portion;
- bearing means for maintaining said slurry pipe in fixed longitudinal relationship with said cooling assembly and for enabling said slurry pipe to rotate with respect to said cooling assembly;
- cooling assembly disconnect flange means positioned longitudinally between said first end portion and said second end portion of said cooling assembly, said flange means serving to define an inlet passage into said cooling assembly and an outlet passage out of said cooling assembly;
- and
- lance support means supportingly engaged with said cooling assembly adjacent said first end of said cooling assembly for moving said lance into and out of a charging opening of a basic oxygen furnace vessel, said vessel being in an operative position and said lance being movable vertically with respect to said vessel.
Dependencies are inferred from the claim text.