Process for heating liquid metal in a continuous casting...

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 11/10 (2006.01) B22D 11/11 (2006.01) B22D 41/015 (2006.01)

Patent

CA 2243523

The invention relates to a process for heating liquid metal (4) in a continuous casting (1) distributor using a plasma torch (18) in the said distributor (1), distinctive in that the said liquid metal (4) is caused to flow on the internal walls of a heating compartment (13) inside the said distributor (1), the end of the said torch (18) being positioned above the level of the liquid metal (4) in the said heating compartment (13) so that the electric arc generated by the said plasma torch (18) radiates onto the liquid metal (4) flowing on the walls of the said compartment (13). The invention also relates to a continuous metal casting distributor (1) of the type including a plasma torch (18) for heating liquid metal (4), a cover (24) with the said torch (18) extending through it and casting nozzles (6, 6') in the bottom of the distributor (1), distinctive in that it has at least one heating compartment made of refractory material (13) positioned below the said plasma torch (18), means for feeding liquid metal (4) into the said heating compartment (13) by causing the said metal (4) to flow on the internal walls of the said distributor (13), and means for causing the heated liquid metal (4) to flow toward the casting nozzles (6, 6')

L'invention a pour objet un procédé de réchauffage d'un métal liquide (4) dans un répartiteur de coulée continue (1) au moyen d'une torche a plasma (18) implantée dans ledit répartiteur (1), caractérisé en ce qu'on fait s'écouler ledit métal liquide (4) le long des parois internes d'un compartiment de réchauffage (13) ménagé à l'intérieur dudit répartiteur (1), l'extrémité de ladite torche (18) étant positionnée au dessus du niveau du métal liquide (4) contenu dans ledit compartiment de réchauffage (13) de manière à ce que l'arc électrique généré par ladite torche à plasma (18) rayonne sur le métal liquide (4) s'écoulant le long des parois dudit compartiment (13). L'invention a également pour objet un répartiteur de coulée continue des métaux (1) du type comportant une torche à plasma (18) pour le réchauffage du métal liquide (4), un couvercle (24) traversé par ladite torche (18) et des busettes (6, 6') de coulée ménagées dans le fond du répartiteur (1), caractérisé en ce qu'il comporte au moins un compartiment de réchauffage en matériau réfractaire (13) positionné en dessous de ladite torche à plasma (18), des moyens pour alimenter ledit compartiment de réchauffage (13) en métal liquide (4) par écoulement dudit métal (4) le long des parois internes dudit répartiteur (13), et des moyens pour amener le métal liquide (4) réchauffé vers les busettes de coulée (6, 6').

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