Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By means introducing treating material
Patent
1994-04-12
1995-07-25
Andrews, Melvyn
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By means introducing treating material
75680, 266265, C22B 905
Patent
active
054355281
ABSTRACT:
A porous plug assembly for use in a vessel containing molten metal, such as a melting furnace or a holding furnace, for introducing fluxing or other gases into the molten metal. The porous plug assembly includes a frustoconical porous refractory core member that is enclosed around its side and bottom by a non-porous refractory lining. Positioned about the outer surface of the non-porous refractory lining is a metallic outer liner, preferably made from inconel, which includes a ceramic anti-corrosion coating. A gas distribution pipe, which also can be made from inconel, extends upwardly through the bottom of the metallic outer liner, through the non-porous refractory lining, and into the interior of the core member for introducing a fluxing gas therein. Surrounding the intermediate, non-porous refractory lining and the metallic outer liner is a refractory nest block. The fluxing gas passes through the porous core member and exits at the top thereof to enter the molten metal melt. A plurality of such porous plugs are distributed over the bottom wall of a melting or a holding furnace for improved distribution of the fluxing gas throughout the melt.
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A Two-Year User's Experience with Porous Plug Fluxing in a Modern Casting Facility, J. R. Guttery, Light Metals 1993, The Minerals, Metals & Materials Society, .COPYRGT. 1992, pp. 899-905.
Guttery James R.
Parker Gary B.
Stewart Douglas V.
Andrews Melvyn
Biddison Alan M.
Reynolds Metals Company
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