Porous nozzle for molten metal vessel
OwnerJunichi Atoinventor
Life of this patent
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Abstract
A refractory porous nozzle which is arranged at the bottom of a molten metal vessel, characterized in that said porous nozzle is made in one body having a flange portion at its upper portion and a cylindrical portion at its lower portion, the outer peripheral surface of the main body of said porous nozzle is gas-tightly enclosed with a steel shell, a gas pool is provided between the bottom surface of said flange portion and the outer peripheral surface of said cylindrical portion, and the inner peripheral surface of said steel shell, and the gas pool is communicated with an inert gas feeding pipe.
Claims3
A refractory porous nozzle assembly which is adapted to be positioned at the bottom of a vessel for containing molten metal, comprising a porous refractory nozzle body including a generally cylindrical flanged portion having an upper surface and a lower surface, and a lower tapered cylindrical portion having an outer peripheral surface;
- a hollow metallic outer shell enclosing said porous refractory nozzle body;
- a first gas conduit between the lower surface of said flange portion and the inner peripheral surface of said metallic shell;
- a second gas conduit between the outer peripheral surface of said lowered tapered cylindrical portion and the inner surface of said metallic shell;
- and at least one gas feed line in communication with at least one of said first and second conduits.
Dependencies are inferred from the claim text.