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From Rocks to Nanos

March 1, 2008
John Allen
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The agitation, by either discs or pegs, imparts shear and attrition forces to the bead mass, which in turn transfers some of this energy into the grinding action. However, most of this energy is lost in frictional heat build-up and it is necessary to incorporate an efficient cooling system. Controlling and managing this otherwise random bead action becomes paramount in order to use the energy being consumed more efficiently.

Whilst most mills will produce, in time, a dispersion where the majority of particles fall into the sub-micron territory, there is usually a ‘big end’ of micron-sized material still in evidence. Further size reduction of these particles is difficult to achieve under the above conditions.

· The ability to effectively separate product from media.

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