Flash Driers are used for drying of wet cakes and powders such as Inorganic Salts, Boric Acid, Starch, Dye Intermediates, Vinyl Sulphone, Pigments, Calcium Carbonate, Silica etc. The wet cake is pulverised and fed to a stream of hot air traveling at high velocity. Drying takes place immediately due to the very large surface exposed. The velocity of the hot air is used to convey the material through a drying duct where remaining moisture is removed and the dried material is transfered to a cyclone seprator. A product classifier ensures only powder leaves the drying chamber.