Activated Carbon - Austro CarbonPAC is manufactured by crushing or grinding carbon particles, 95– of which will pass through a 80-mesh sieve (0.177mm or smaller) as per ASTM standard. It is not advisable . PAC is generally added directly to pocess units, such as raw water intakes, rapid mix basins, clarifiers, and gravity filters. Granular activated.charcoal gravity grinder,Planetary Ball Mill PM 100 - RETSCH - highest finenessalloys, bentonite, bones, carbon fibres, catalysts, cellulose, cement clinker, ceramics, charcoal, chemical products, clay minerals, coal, coke, compost, concrete, . In this way the different heights of the centers of gravity of differently-sized grinding jars can be compensated in order to avoid disturbing oscillations of the.