Crystallizing apparatus

Details Crystallizing apparatus Crystallizing apparatus

B - Operations, Transporting

01

D

161/33

B01D 9/00 (2006.01)

Patent

CA 1192833

ABSTRACT OF THE DISCLOSURE A crystallizing apparatus particularly for use with undercooled melts. Crystallizing is effected on the cooling conveyor belt in a thick layer. A precrystallizer comprises at least two rolls arranged above the cooling conveyor and rotating in the same direction. A shear gap is formed between the rolls. A melt is applied to an upper- most one of the rolls in a thin layer. In the course of the path followed by the melt over the rolls, shearing forces are generated within the area of the shear gap, which enhance the nucleation. A further enhancement of nucleation is obtained by cooling the rolls, so that relatively large volumes of the melt may be crystallized per unit time in the crystallizing apparatus without the need for the addition of supplemental seed crystals to the melt. The amount of melt in the precrystallizer is very small.

401399

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