Ultrafine Dry Grinding with Media Mills

摘要

Used since the Stone Age,grinding is the oldest engineering process.Mills have been operated by human muscles and the energy input was created by rubbing,rolling and knocking with pestles and grinding stones.This basic grinding mechanism is still used in modern media and roller mills;today,however,operated with electric engines up to 20.000 Kilowatts.At first,particles sizes in the range of some Millimetres were sufficient;nowadays even particles with a diameter of few Nanometers can be obtained by use of media mills.