The Microniser is a classical spiral jet micronising mill
utilising compressed gas to produce superfine materials by
autogenous comminution. Compressed air is most commonly used but
steam is favoured for some applications and inert gases may
offer advantages for particularly sensitive materials or
materials with explosion risks. The feed material is inspirated
by a small proportion of the compressed gas through a venturi
into the grinding chamber where numerous angled nozzles
accelerate the material into particle-particle impact. There are
no moving parts in the mill and no mechanical forces are applied
to the grinding process. The centrifugal movement of particles
in the chamber provides effective classification to control
product particle size. Products will typically be less than 10
microns. The mill is usually manufactured in stainless steel and
can be supplied with various abrasion resistant linings. For
pharmaceutical purposes it can be supplied within a full
isolation system. The particular advantages