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1. GB2242636 - Method and apparatus for controlling flow of molten metals

Office Royaume-Uni
Numéro de la demande 9027661
Date de la demande 20.12.1990
Numéro de publication 2242636
Date de publication 13.02.1991
Type de publication A
CIB
B22D 39/06
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
22FONDERIE; MÉTALLURGIE DES POUDRES MÉTALLIQUES
DCOULÉE DES MÉTAUX; COULÉE D'AUTRES MATIÈRES PAR LES MÊMES PROCÉDÉS OU AVEC LES MÊMES DISPOSITIFS
39Équipement pour l'alimentation en métal liquide en quantités bien définies
06comportant un réglage de la pression sur le bain de métal liquide
B22D 41/14
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
22FONDERIE; MÉTALLURGIE DES POUDRES MÉTALLIQUES
DCOULÉE DES MÉTAUX; COULÉE D'AUTRES MATIÈRES PAR LES MÊMES PROCÉDÉS OU AVEC LES MÊMES DISPOSITIFS
41Récipients de maintien d'un bain de fusion, p.ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues
14Fermetures
CPC
B22D 39/06
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
39Equipment for supplying molten metal in rations
06having means for controlling the amount of molten metal by controlling the pressure above the molten metal
B22D 41/14
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
41Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
14Closures
Déposants MONKS JAMES HERBERT
Inventeurs MONKS JAMES HERBERT
Données relatives à la priorité 9007618 04.04.1990 GB
Titre
(EN) Method and apparatus for controlling flow of molten metals
Abrégé
(EN)
The invention provides for controlling the flow of molten metal from a holding vessel such as a tundish through a discharge orifice (2) into a receptacle such as a mould. Within the holding vessel is provided a flow control chamber (1) comprising a down-flow chamber (6) having an outlet at its lower end leading to or forming part of the discharge orifice (2), and an opening at its upper end. Also provided is an up-flow chamber (4) having a lower inlet (5) for melt from the holding vessel, and an opening at its upper end. The upper end openings coincide and are provided by a weir-forming partition member (3). An upper chamber (7) can receive gas at a pressure to allow molten metal from the holding vessel to pass through the inlet (5) to establish in the lower end of the down-flow chamber (6) a column of molten metal with a volume of gas occupying the upper end of the flow control chamber and serving to separate the column of molten metal from the up-flow chamber (4), whereby an equilibrium is established between molten metal passing through the inlet (5) and molten metal passing out through the discharge orifice (2) such that the height of the column of molten metal in the down-flow chamber (6) remains substantially constant. By increasing the gas pressure, and hence reducing the said volume of gas, the height of the column of molten metal increases and thus also the flow rate through the discharge orifice; or by reducing the gas pressure, and hence increasing the said volume of gas, the height of the said column decreases and thus also the said flow rate. In an alternative embodiment (Figure 2, not shown) the gas system operates by creating a variable low pressure (suction) in the upper chamber.