Air cooled refractory lance

Details Air cooled refractory lance Air cooled refractory lance

F - Mech Eng,Light,Heat,Weapons

27

D

39/105

F27D 3/16 (2006.01) C21C 5/32 (2006.01) F27D 7/02 (2006.01)

Patent

CA 1258371

ABSTRACT OF THE DISCLOSURE A fluid cooled lance has an elongated tubular refractory body with a pair of tubular members arranged coaxially therein, one of said tubular members having longitudinally extending configurations which engage the inner surface of said refractory body, the other tubular member being disposed within the first mentioned tubular member engaging the inner surfaces of said longitudinally extending configurations thereof so as to form a plurality of separate longitudinally extending passageways, said tubular members forming means for introducing a coolant fluid into the lance and directing said coolant fluid therefrom, a secondary tubular member in said elongated tubular refractory body communicating with the opposite ends thereof and means for introducing stirring and refining gas into said secondary tubular member for delivery by said lance to said molten metal bath. -2-

490034

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