Refractory gas permeable structural unit
AssigneeArbed S.A.
InventorsBruno Hirschberg, Francois Schleimer
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Abstract
A refractory gas permeable structural unit for blowing a gas into a metal treatment container and through its casing, has a refractory gas permeable stone, a first metal housing sealingly surrounding the stone, a second metal housing arranged at a distance from the first metal housing, a refractory substantially gas impermeable filler material provided between the first and second metal housings, and at least one connection and a distribution chamber provided at the end face of the stone.
Claims15
A refractory gas permeable structural unit for blowing gas into a metal treatment vessel and through its casing and insertable in the vessel, the structural unit comprising a gas permeable refractory stone having a gas inlet end face;
- a first metal housing sealingly surrounding said stone;
- means forming at least one gas supply connection for supplying gas toward said end face of said gas permeable refractory stone;
- means forming a gas distributing chamber between said gas supply connection and said end face of said gas permeable refractory stone, so that gas is supplied by said gas supply connection into said distributing chamber and travels from the latter through said gas permeable refractory stone surrounded by said first metal housing;
- a second metal housing arranged at a distance from said first metal housing;
- and a refractory substantially gas impermeable filler material provided between said first and second metal housings so as to prevent swelling of said first metal housing and absorption by said first metal housing of carbon or nitrogen from the surrounding vessel.
Dependencies are inferred from the claim text.