Thermal jacket for a vessel

Details Thermal jacket for a vessel Thermal jacket for a vessel

B - Operations, Transporting

22

D

B22D 41/005 (2006.01) F27D 9/00 (2006.01) F27D 19/00 (2006.01)

Patent

CA 2410973

A thermal jacket (30) for use in the production of a semi-solid slurry billet. The thermal jacket (30) includes symmetrical halves (30a, 30b), each having a heat transfer surface (50) extending between a pair of longitudinal edges (54a, 54b). An actuator mechanism (32) engages the heat transfer surfaces (50) into intimate contact with a vessel (20) containing metallic melt to effectuate conductive heat transfer, with the longitudinal edges (54a, 54b) being disposed in a generally opposite, spaced relationship. The thermal jacket (30) includes a plurality of cooling air passageways (120, 122) for extracting heat from the metallic melt, and a plurality of electric heating elements (132) for adding heat to the metallic melt. The cooling rate of the metallic melt is controlled within a range of about 0.1 to 10 degrees Celsius/second by regulating the flow of cooling air and the activation of the heating elements (132). Fluid manifolds (104, 106) are disposed at opposite ends of the thermal jacket (30) to distribute and direct the flow of cooling air.

L'invention porte sur une coquille thermique (30) servant à la production d'un bain semi-solide de billettes comportant deux demi-coquilles symétriques (30a, 30b), présentant chacune une surface de transfert thermique (50) s'étendant entre une paire de bords longitudinaux (54a, 54b). Un mécanisme de vérins (32 ) place les surfaces de transfert thermique (50) en contact intime avec une cuve (20) contenant le métal en fusion afin d'effectuer un transfert thermique par conduction, les bords longitudinaux (54a, 54b) étant alors disposés sensiblement face à face et séparés l'un de l'autre. La coquille thermique (30) comporte plusieurs passages d'air de refroidissement (120, 122) servant à extraire des calories de la masse en fusion, et plusieurs éléments chauffants (132) servant à lui fournir des calories additionnelles. On peut ainsi régler la vitesse de refroidissement du métal en fusion entre environ 0,1 et 10 ·C/s en jouant sur le débit d'air de refroidissement et sur l'activation des éléments chauffants (132). Des tubulures (104, 106) placées de part et d'autre des coquilles (30) distribuent et dirigent le flux d'air de refroidissement.

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