Granulating process

Details Granulating process Granulating process

1976-05-19

1978-02-14

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264117, B01J 216

Patent

active

040738388

ABSTRACT:
A batch process for forming a granulate of predetermined granule size distribution from a powdered solid substance or, a mixture of powdered solid substances, which comprises the steps of (a) blowing hot air upwardly through a batch of said mixture of powdered substances to form a fluidized bed having a lower portion and an upper portion, (b) spraying into the upper portion of said fluidized bed a hot bonding liquid at a rate sufficient to cause the particles of the powdered substances to coalesce and initiate a buildup of granules, (c) simultaneously breaking down the built-up granules in the lower portion of the fluidized bed by impact with rigid blades moving at high speed to establish an equilibrium between build-up and break-down of granules, the granule build-up rate slightly exceeding the break-down rate, and (d) recovering the granulate when the desired granule size distribution has been achieved.

REFERENCES:
patent: 2938233 (1960-05-01), Nack et al.
patent: 3880968 (1975-04-01), Kaspar et al.

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