Ingot mould for the continuous vertical casting of metals

Details Ingot mould for the continuous vertical casting of metals Ingot mould for the continuous vertical casting of metals

B - Operations, Transporting

22

D

B22D 11/04 (2006.01) B22D 11/041 (2006.01)

Patent

CA 2251020

An ingot mould has a cooled copper or copper alloy body (1) on top of which is mounted a refractory feeder bush (2) and at the interface of which is provided a sweeping slot (8) through which an inert waste gas stream is injected at the inner periphery of said ingot mould. The slot is fed by a distribution chamber (13) provided inside the ingot mould, which chamber is in turn fed with gas by manifolds (12) connecting it to a pressurised gas source (20). The injection slot (8) is divided, along the periphery of the ingot mould, by separation means (21) which also divide the distribution chamber into adjacent compartments (13'-13'') extending along the periphery of the ingot mould so that an inlet manifold (12) opens into each compartment thus formed. A plurality of elementary systems (12'-13'-8') are thus obtained, which are mounted parallel to each other on a single pressure chamber (20) so that, generally, the injection of gas at the periphery of the ingot mould is substantially insensitive to local interferences, such as localised variations of slot thickness.

Cette lingotière est constituée par un corps de lingotière refroidi (I) en cuivre ou alliage de cuivre, surmonté par une rehausse réfractaire (2) et à l' interface desquels est ménagée une fente de balayage (8) par laquelle un courant de gaz inerte perdu est injecté selon le pourtour intérieur de la lingotière. La fente est alimentée par une chambre de distribution (13) ménagée au sein de la lingotière, et elle-même alimentée en gaz par des tubulures (12) qui la relient à une source de gaz sous pression (20). La fente d'injection (8) est segmentée selon le pourtour de lingotière à l'aide de moyens de séparation (21) qui segmentent également la chambre de distribution en compartiments (13', 13"...) juxtaposés selon le pourtour de la lingotière et de manière qu'une tubulure d'admission (12) débouche dans chaque compartiment ainsi formé. On réalise ainsi une pluralité de circuits élémentaires (12', 13', 8'), montés "en parallèle" sur une chambre de pression unique (20) de sotte que, globalement, l'injection de gaz selon le pourtour de la lingotière devient peu sensible aux perturbations locales, comme les variations ponctuelles de l'épaisseur de la fente.

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