Screening is the process of separating inert materials into different granulometric sizes based on the size of the networks installed.
In an aggregate crushing plant, screening takes place through the use of a screen, or a device composed of one or more superimposed perforated sheets; at the top those with larger diameter holes and at the bottom those with smaller holes; placed on a frame and vibrated to facilitate the movement of the material. The vibrations are imprinted by a shaft with eccentric masses that generally has a frequency of 500-1500 cycles/hour, which allows inert materials to be separated according to their size.
RIMAC screens are divided into:
· Roughing screens designed for primary screening. These machines are equipped with a screening table consisting of a series of bars arranged in a cascade or of perforated sheets as needed. They are ideal for treating materials with a size of 0-500 mm.
· Refiners sieves designed for secondary and tertiary screening. These machines are equipped with a screening surface consisting of perforated nets arranged on an inclined plane. They are ideal for treating materials with a size of 0-130 mm.
