Continuous casting device with rollers and casting method...

B - Operations – Transporting – 22 – D

Patent

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B22D 11/06 (2006.01)

Patent

CA 2303155

Continuous casting device with rollers for the production of steel strip, particularly but not only for steels with low to medium carbon content, comprising a pair of counter-rotating rollers (11a, 11b) with an at least partly cooled surface, the strip (16) being formed by the coupling and the joining of the skin (14a, 14b) of metal forming on the cooled surface of the rollers (11a, 11b) and being extracted by an extraction and possibly straightening assembly (17), the arc of the rollers outside the sector of contact with the liquid metal (13) being at least partly associated with a heating system (18, 20), the device comprising rollers (11a, 11b) partly immersed in a recipient (12) containing liquid metal arranged below the rollers (11a, 11b) and an extraction and possibly straightening assembly (17) arranged above the rollers (11a, 11b) and suitable to extract the strip (16) from above. Continuous casting method for steel strip (16) adopting the device as above, wherein the bath of liquid metal (13) is located below the rollers (11a, 11b) which are partly immersed and the strip (16) is extracted from above.

L'invention se rapporte à un dispositif de coulée en continu, pourvu de cylindres et conçu pour la fabrication de bandes d'acier, et notamment mais pas exclusivement de bandes d'acier à teneur faible à moyenne en carbone. Ce dispositif comporte une paire de cylindres contrarotatifs (11a, 11b) possédant une surface refroidie au moins en partie, une bande (16) étant formée par couplage et assemblage de la peau (14a, 14b) de métal qui se forme sur la surface refroidie des cylindres (11a, 11b) et qui est extraite par un ensemble (17) extracteur et éventuellement raidisseur, l'arc des cylindres qui se trouve en dehors du secteur de contact avec le métal liquide (13) étant au moins partiellement associé à un système de chauffage (18, 20). Le dispositif pourvu de cylindres (11a, 11b) est partiellement immergé dans un récipient (12) contenant du métal liquide situé sous les cylindres (11a, 11b) et un ensemble extracteur et éventuellement raidisseur (17), qui est disposé au dessus des cylindres (11a, 11b), permet d'extraire la bande (16) en partie supérieure. L'invention se rapporte également à un procédé de coulée en continu permettant de mouler des bandes d'acier (16) et mettant en oeuvre le dispositif décrit ci-dessus, dans lequel le bain de métal liquide (13) est situé sous les cylindres (11a, 11b) qui sont partiellement immergés et la bande (16) est extraite en partie supérieure.

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