Methods of metal powders production
Method of a centrifugal granulation (CG)
of melt
The CG method consists in melt breaking
up by a centrifugal force. This method
has different fulfillment:
- Granulation by rotated perforated
cup (with holes),
- Atomisation from an edge of the rotated
disk or bowl,
- Atomisation of flowed layer of rotating
billet.
 Our
firm develops the first two variant with
the purpose of manufacture of granule
or shot from 100 microns up to 3 mm. A
granulation through a perforated cup at
known advantages (high efficiency, the
uniformity of the sizes particles) has
also essential lack - impossibility of
reception of small-sized particles (less
than 200-300 microns) or low runout (less
than 10 %). The technique of melt granulation
(Patent №1827325) designed by UralNETRAMM
allows to increase a runout of small-sized
particles considerably (up to 95 %) at
preservation of advantages of a known
method. The granulation can be carried
in water, kerosene (or other inert liquid)
and thus demanded floor spaces decrease
considerably, however it needs an operation
of drying of pellets. A granulation in
air or in inert gas (argon, nitrogen)
results in increasing of jet chamber.
However reception of granule with the
spherical form is possible here . By CG
method it is possible to receive powders
and shot of aluminum, magnesium, lead,
zinc, tin and other metals and alloys
with a melting temperature up to 700 0С.
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