C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
C21C 5/48 (2006.01) B22D 1/00 (2006.01) C21C 7/072 (2006.01)
Patent
CA 2440404
The invention concerns a plug or brick (1) for injecting gas into molten metal through a molten metal-contacting surface (11) comprising (i) a porous refractory body (2) substantially surrounded by a substantially non-porous body (9) except at the molten metal-contacting surface (11); and (ii) gas conducting means (3, 5) for conveying the gas from a gas source to the porous body (2). The plug or brick is characterized in that the non-porous body (11) is made of refractory material and in that the porous and non-porous bodies (2, 11) have been co-pressed. This plug or brick can be used to inject efficiently and reliably small bubbles into a molten metal bath.
La présente invention concerne un bouchon ou une brique (1) pour l'injection de gaz dans du métal en fusion au travers d'une surface de contact avec le métal en fusion (11), comprenant (i) un corps réfractaire poreux (2) sensiblement entouré d'un corps sensiblement non poreux (9) à l'exception de la surface de contact avec le métal en fusion (11); et (ii) des organes conduisant les gaz (3, 5) servant à amener le gaz d'une source de gaz au corps poreux (2). Le bouchon ou la brique sont caractérisés en ce que le corps non poreux (11) est fait d'un matériau réfractaire, et que les corps poreux et non poreux (2, 11) ont été comprimés ensemble. Ce bouchon ou cette brique conviennent particulièrement pour l'injection puissante et fiable de petites bulles dans le bain de métal en fusion.
Millward Cavan
Willoughby Craig
Robic
Vesuvius Crucible Company
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