FIELD: process engineering.
SUBSTANCE: proposed unit comprises crystalliser with its angle zones furnished with smooth transitions and secondary cooling zone with spraying nozzles. Billet is directed in secondary cooling zone without support or with the help of rollers with their width equal to straight sections between smooth transitions. Rounding in smooth transitions makes 20% and more of the billet cross section side length. Degree of distortion 1/R of smooth transitions, in billet travel per crystalliser length, decreases to deform the crust.
EFFECT: improved structure of billet structure in angle zones, elimination of rhombic form, cracks and undesirable weight deviations.
9 cl, 8 dwg, 1 tbl
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