C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
39/104
C21C 1/00 (2006.01) B22D 1/00 (2006.01) C21C 5/48 (2006.01) C21C 7/072 (2006.01)
Patent
CA 1247861
ABSTRACT A gas-permeable element of a refractory material for flowing gases into a metal treatment vessel through its lining comprises a refractory body having longitudinal sides, a free inner end surface at which a refractory material of the refractory body is exposed, and an opposite outer end surface. At least one local opening provided with a metal insert extends through the refractory body to form a gas passage between the inner and outer end surfaces, the metal insert being formed as at least one laterally closed thin metal channel arranged in the local opening of the refractory body. A gas-distributing chamber is separated from the re- fractory material of the refractory body by a metal sheet plate. The channel is tightly mounted in the metal sheet plate so that the refractory material of the refractory body is maintained free from loading with a gas pressure, the metal channel having an outer side. A coating coats the outer side of the metal channel so as to be located between the metal channel and the refractory body, the coating being composed of a refractory material having elastic properties so that it absorbs expansions which take place in the gas permeable element and therefore mechanically protects the metal channel.
469956
Handler Rudolf
Kassegger Friedrich
Liesch Jean-Francois
Arbed S.a.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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