Process for surface treatment of pulverulent material

Details Process for surface treatment of pulverulent material Process for surface treatment of pulverulent material

1990-05-23

1993-01-05

Beck, Shrive

Coating processes

Spray coating utilizing flame or plasma heat

Organic containing coating

427212, 427215, 427216, 427220, 427222, 75 1019, 204165, 204168, B05D 108

Patent

active

051769387

ABSTRACT:
A process for the surface treatment of individual particles of a pulverulent material to improve the surface properties thereof. The process includes a plasma-generating apparatus for generating a plasma in a plasmagenerator while supplying an inert gas at a high drift velocity into the generator to form a low temperature plasma flame which is directed into a low pressure zone. Subsequently, the pulverulent material is injected into the high velocity inert gas or into the base of the plasma flame to disintegrate any particle aggregate present in the material. The low temperature plasma acts on the surface of each individual particle to improve the properties thereof. The treated particles can then be recovered from the zone.

REFERENCES:
patent: 3010009 (1961-11-01), Ducati
patent: 4328257 (1982-05-01), Muehlberger et al.
patent: 4596718 (1986-06-01), Gruner
patent: 4670290 (1987-06-01), Itoh et al.
patent: 4801435 (1989-01-01), Tylko
patent: 4877640 (1989-10-01), Muehlberger et al.
patent: 4901921 (1990-02-01), Dallaire et al.

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