Method and apparatus for spraying agglomerating powders

Details Method and apparatus for spraying agglomerating powders Method and apparatus for spraying agglomerating powders

B - Operations, Transporting

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B05D 7/14 (2006.01) B05B 7/14 (2006.01) B05B 15/02 (2006.01) B21C 51/00 (2006.01)

Patent

CA 1053897

SPECIFICATION MICHAEL L MESTER and FRANK L. WHITEMAN METHOD AND APPARATUS FOR SPRAYING AGGLOMERATING POWDERS ABSTRACT OF THE DISCLOSURE An apparatus for pneumatically spraying dry powders through a delivery tube from a fluidized powder reservoir having a bed powder chamber housing within said reservoir to provide an elongated chamber communicating with the delivery tube. The housing has an opening through a wall thereof, a sliding gate valve to selectively close said opening, and a wiping means on said valve to wipe the edges of the opening whenever the valve is activated. Means are provided for blowing a low-velocity purging gas through the powder chamber and delivery tube when the opening through the wall of the powder chamber is closed, and a high-velocity spraying gas when the opening is open to admit fluidized powders.

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