Method and apparatus for descaling metal strip
AssigneeKolene Corporation
InventorsJohn M. Cole, Charles M. Bessey
Life of this patent
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Abstract
A system for descaling a strip of metal includes a nozzle assembly mounted within a spray box for spraying descaling product on the strip. The nozzle assembly includes a spray chamber; nozzles mounted directly to the spray chamber; and a heater for heating the chamber, the descaling product in the chamber, and the nozzles by conduction through the chamber. The nozzles are oriented to direct the descaling product in a spray against the upper and lower surfaces of the metal strip for an amount and a time sufficient to descale the metal strip. The nozzle assembly is attached to the spray box and can be easily removed therefrom for inspection.
Claims10
A method for descaling a metal strip having upper and lower surfaces traveling at a predetermined speed in an annealing line, comprising the steps of:
- providing a spray box for enclosing a portion of the metal strip in the annealing line,
- mounting a chamber at least partially within an aperture formed in a side of said spray box, said chamber having a nozzle device mounted in heat exchange relationship with said chamber, said chamber being mounted in said spray box such that said chamber can be easily removed through said aperture in said spray box when said chamber or nozzle device becomes damaged or unusable,
- providing a descaling product within said chamber in molten form with a consistency sufficient to be sprayed through said nozzle device,
- passing the metal strip to be descaled through the spray box,
- directing the molten descaling product through said nozzle device against one of said upper or lower surfaces of the metal strip in the spray box of an amount and time sufficient to descale such surface of the metal strip,
- heating said chamber before and while the molten descaling product is directed through the nozzle device to a temperature above the melting point of the descaling product, said chamber conductively heating said nozzle device to a temperature above the melting point of the descaling product, and
- removing excess descaling product from the surface of the metal strip.
Dependencies are inferred from the claim text.