ABSTRACT
Screening is an operation used for separation of particles according to their sizes. Sieving and screening are distinguished by the fact that sieving is a batch process used almost exclusively for test purposes, whereas screening is a continuous process and is used mainly on an industrial scale. Sieves are manufactured with definite dimension and standard aperture sizes. Screens can be manufactured with any dimension and any aperture sizes as per the requirement. In Industrial screening, the particles of various sizes are fed to the screen surface. The material passing through the screen aperture is called underflow (undersize or fines) while the material retained on the screen surface is called overflow (oversize or coarse).
