Abrasion in solid materials occurs because of the rubbing of solid pieces against each other (or any mechanical component). The rubbing typically takes place during transportation, in vessels or pneumatic, while loading and during any handling of the material. Abrasion leads to the formation of finer dust and to the consequent loss of precious material or valuable features.
Therefore, abrasion resistance is a property of the utmost importance for industrial catalysts. It also provides meaningful information for other industrial products (pharmaceutical tablets, fertilizers, sugar and ceramics).
ROTAB-AS/S, a rotating cylinder abrasimeter, is an instrument for determining the abrasion resistance of solid materials, either in a granular or a pellet shape or as a coarse powder. The rotation rate of the vessel can be varied in the range 30-90 rpm. The constant-rotation version of the instrument (ROTAB-AS) features a fixed rotation rate of 65 rpm. Both instruments were designed according to the ASTM standard method D4058, covering the particle size range 0.85-20 mm. Measurements can also be performed on larger size materials.