APPARATUS FOR FINE POWDER PARTICLE PROCESSING UTILIZING CENTRIFUGAL CONFINEMENT TO MITIGATE PARTICLE ELUTRIATION

Abstract: a powder treatment system with variable speed of rotation of a treatment vessel containing the powder at different stages of the treatment process. during treatment stages where gas flow may be present (e.g., pump down), the treatment vessel is spun at a centrifugal speed in order to confine the fine powder particles within the treatment vessel and prevent or substantially minimize elutriation losses. during treatment stages where gas flow may be minimal or not present (e.g., treatment dwell time), the rotational speed of the treatment vessel is a cataracting speed in order to uniformly treat the fine powder particles whilst avoiding or substantially minimizing elutriation losses. a movable comb can be moved from a first position not in contact with the particles confined against the inner surface of the treatment vessel during rotation of the treatment vessel at a centrifugal speed, to a second position that encourages separation of the particles from the inner surface of the treatment vessel and breaks up agglomerates during rotation of the treatment vessel at a cataracting speed.

Inventor(s): Samuel J. Wright, Maxim S. Shatalov, Emmananuel Lakios, Paul J. Decker, John B. Feraca

CPC Classification: C23C16/4417 (COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion ; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. , ; metallising of glass ; metallising mortars, concrete, artificial stone, ceramics or natural stone ; enamelling of, or applying a vitreous layer to, metals ; treating metal surfaces or coating of metals by electrolysis or electrophoresis ; single-crystal film growth ; by metallising textiles ; decorating textiles by locally metallising ))

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