Rotary dryers or calciners as they also known can handle a vast range of materials, however they are most likely to be operated in the mining, minerals, fertiliser and chemical industries.
Industrial rotary dryers consist of a cylindrical shell rotated upon bearings and usually slightly inclined to the horizontal. P...
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Rotary dryers or calciners as they also known can handle a vast range of materials, however they are most likely to be operated in the mining, minerals, fertiliser and chemical industries.
Industrial rotary dryers consist of a cylindrical shell rotated upon bearings and usually slightly inclined to the horizontal. Product is fed into the upper end of the dryer and dried product withdrawn at the lower end. Transportation of the product through the dryer is assisted by slowly rotating the shell.
There are many types of industrial rotary dryer including: Direct rotary dryer – It consists of a bare metal cylinder with or without flights and is suitable for low or medium temperature operations. Direct rotary kiln – It consists of a metal cylinder lined in the interior with insulating block or refractory brick, in order to suitable for operation at high temperatures. Indirect steam-tube dryer – It consists of a bare metal cylinderical shell with one or more rows of metal tubes installed longitudinally in its interior. It is suitable for operation up to the available steam temperature or in processes requiring water-cooling of the tubes. Indirect rotary calciner – It consists of a bare metal cylinder surrounded by a fired or electrically heated furnace and it is suitable for operation at high temperatures. Direct Rotary Louvre dryer – It is perhaps, the most important of the special types, as the solids progress in a crosscurrent motion to the gas, and it is suitable for low and medium temperature operations.
Manufacturers include Mitchel dryers, Feeco, JND Technologies and Simon Dryers.
