ABSTRACT
The precursor to any successful application of a mechanical conveying system is the proper analysis and characterization of the material to be conveyed. This is due to the fact that most conveying system designs are tailored specific to the material to be handled. Certain properties of a bulk solid are relevant to all forms of conveyors. Bulk density and particle size are examples of such properties. Other properties are only relevant in certain types of conveyors. The angle of surcharge, for example, is only useful in belt conveying. Often, certain properties will exclude certain types of conveyors. Conveyor Equipment Manufacturers Association (CEMA) also provides in their publications suggested testing procedures for the various properties to be determined. CEMA classifies four major types of shapes: Rounded; Subrounded; Subangular; and Sharp Angular. CEMA recommends the use of US Standard screens.
