Process of continuously casting metals

B - Operations – Transporting – 22 – D

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B22D 11/16 (2006.01) B22D 11/07 (2006.01)

Patent

CA 2088882

A process for continuous casting of metals, particularly aluminium, in a multiple mould casting system supplies the gas for each mould through at least one pipeline. Each pipeline is equipped with a control valve for regulating the gas flow, a pressure sensor, and a device for recording the volume of gas flowing to the mould. In a first casting phase from the commencement of mould filling to the entry of the billet into the water-cooled region of the mould, the flow of gas in each pipeline is maintained constant at a predetermined level. In a second casting phase, the flow of gas in each pipeline is controlled so that the gas pressure is kept constant at a predetermined level.

Procédé de coulée en continue de métaux, en particulier de l'aluminium, dans un système de coulage à moules multiples, selon lequel le gaz requis pour chaque moule est alimenté par au moins une canalisation. Chaque canalisation est munie d'un régulateur de débit de gaz, d'un capteur de pression et d'un dispositif utilisé pour enregistrer le volume de gaz circulant vers le moule. Dans une première étape de coulage, depuis le début du remplissage du moule jusqu'à l'introduction de la billette dans la zone du moule refroidie à l'eau, le débit du gaz dans chacune des canalisations est maintenu à niveau constant prédéterminé. Dans une deuxième étape de coulage, le débit du gaz dans chacune des canalisations est contrôlé de manière à ce que la pression du gaz soit maintenue à un niveau constant prédéterminé.

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