Plug for molten metal refining vessel

Details Plug for molten metal refining vessel Plug for molten metal refining vessel

F - Mech Eng,Light,Heat,Weapons

27

D

F27D 3/16 (2006.01) B22D 1/00 (2006.01) C04B 38/06 (2006.01)

Patent

CA 2073811

A plug for a molten metal refining vessel, which comprises: a plug body to be releasably attached to an opening provided in a wall of a molten metal refining vessel, the plug body comprising a non-porous refractory with a porosity of up to 20%; and a plurality of gas blowing apertures formed in the plug body and running through the plug body in the axial direction thereof. Each of the above-mentioned plurality of gas blowing apertures comprises a slit, and the slit has substantially a rectangular shape having a length of the shorter side thereof within a range of from 0.08 to 0.25 mm. Each gas blowing aperture should preferably have a cross-sectional area of at least 2 mm and the total amount of the cross-sectional areas of the plurality of gas blowing apertures should preferably be limited to up to 20% relative to the area of the upper end face of the plug body.

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