Method and device for unplugging a molten metal discharge port

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 41/46 (2006.01) B22D 41/42 (2006.01)

Patent

CA 2168120

Method and device for opening the outlet of a molten metal handling vessel, comprising a valve (6) having relatively moveable valve parts (7, 9 and 8, 11) and a frangible tube (13) tbrough which gas can be passed, the tube (13) extending tbrough the valve parts (7, 9 and 8, 11) into the outlet (5a) of the vessel, whereby opening the valve (6) by relative movement of the valve parts (9, 11) breaks the tube so that it does not obstruct opening, the end of the tube (13) having a cup-shaped seating portion (13a) to mate with a similarly-shaped recess in or adjacent the valve (6).

L'invention concerne un procédé et un dispositif permettant d'ouvrir l'orifice de décharge d'une cuve de traitement de métal en fusion. Ce dispositif comprend un clapet (6) comportant des parties (7, 9 et 8, 11) mobiles les unes par rapport aux autres et un tube frangible (13) à travers lequel le gaz peut circuler. Le tube (13) s'étend à travers les parties du clapet (7, 9 et 8, 11) et entre dans l'orifice de décharge de la cuve. l'ouverture du clapet par mouvement relatif des parties (9, 11) dudit clapet entraîne la rupture du tube de manière à ce qu'il ne bouche plus l'ouverture. L'extrémité du tube (13) comporte une partie d'appui cupuliforme (13a) destinée à être appariée à une cavité correspondante pratiquée dans le clapet (6) ou à côté.

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