Method for determining and controlling material flux of...

C - Chemistry – Metallurgy – 21 – D

Patent

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C21D 9/00 (2006.01) C21D 11/00 (2006.01) G05B 17/00 (2006.01) B21B 1/46 (2006.01) B21B 37/00 (2006.01)

Patent

CA 2305401

The invention relates to a method for determining and controlling the material flux of continuous cast slabs, in particular steel slabs, by tracking and optimizing the temperature on their transport path between the continuous casting machine and the rolling mill. The known temperature of the liquid phase at the casting die exit of the continuous casting plant and the physical parameters of the slab are used as starting points in order to determine the heat amount and the temperature profile of the slab. The convective intermixture of the heat quantity contained in the slab and the time-dependent heat loss of the slab, which is inhomogeneously cooling to the surrounding medium, are then calculated by means of a mathematical/physical model. The result of the calculation is used, optionally together with the measured surface temperature of the slab, in order to control the flux of material in an existing slab tracking system.

L'invention concerne un procédé pour déterminer et réguler le flux de matière pour des brames coulées en continu, notamment des brames d'acier, par suivi et optimisation de la température sur leur trajectoire de transport entre la machine de coulée continue et le laminoir. La température connue de la phase liquide en sortie de lingotière de la machine de coulée continue et les paramètres physiques de la brame sont utilisés comme points de départ pour déterminer la quantité de chaleur et le profil de température de cette brame. Le mélange intime par convection de la quantité de chaleur contenue dans la brame et la déperdition de chaleur, variable en fonction du temps, de la brame, laquelle se refroidit de manière non homogène, en faveur du milieu ambiant respectif, sont calculés à l'aide d'un modèle physico-mathématique. Le résultat de ce calcul est utilisé, éventuellement conjointement avec la température superficielle de la brame, en vue de réguler le flux de matière dans un système de suivi existant de la brame.

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