Process for dust reduction treatment of expanded perlite

Details Process for dust reduction treatment of expanded perlite Process for dust reduction treatment of expanded perlite

1978-02-13

1979-04-10

Silverberg, Sam

Coating processes

Particles, flakes, or granules coated or encapsulated

Applying superposed diverse coatings or coating a coated base

264117, 264 42, 427220, 427221, 252378P, 106DIG2, C04B 3126, B65B 118

Patent

active

041489411

ABSTRACT:
The dust fraction of expanded perlite is bonded to the larger sized grains by spraying finely atomized paraffin at a temperature of less than 130.degree. C. upon the perlite which has been cooled to a temperature of less than 130.degree. C. In a second embodiment of the invention, the perlite is treated with a water repellent process prior to the paraffin treatment.

REFERENCES:
patent: 2625512 (1953-01-01), Powell
patent: 3010840 (1961-11-01), Goff

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