A rotary kiln dryer is an industrial drying system that utilizes a rotating cylindrical drum, slightly inclined to the horizontal, to dry a wide range of bulk materials. The unit has a rotating cylinder-shaped shell that is slightly tilted to make it easier for materials to move through the dryer by gravity. This process enables efficient heat transfer and moisture removal, making rotary kiln dryers suitable for drying granular, powdery, or even paste-like materials with moisture contents ranging from 3% up to 50%, and achieving final moisture levels as low as 0.5%.
As the drum rotations hot gases, which may be manufactured from a burner or another heat source, flow either with the material flow or against it. These gases spread heat through conduction, convection, and radiation. Rotary kiln dryers are widely used in industries such as cement, metallurgy, chemicals, and building materials due to their reliable operation, strong adaptability, and ability to handle large processing capacities.
