1. Screening surfaces

Paragraph written in collaboration with J. M. OUDOT (Établissement Gantois).

The product fed to a screen is called the "all-runoff": the screening process separates the all-runoff into passings (or sieves) and rejects. A screen's throughput (or screening capacity) corresponds to the hourly mass quantity that the machine can receive for a given screening efficiency.

Granularity refers to the set of characteristics defining the granular state of a product, with :

• granulometry, measurement of grain size and distribution;

• the length of a grain, its largest dimension, and its thickness, the distance between two parallel planes through which the grain can pass;

• ...