FRITSCH PULVERISETTE 0 - Manual (Page 29)

Maximum load:
‐ Sieving stock < 1 kg
‐ Sieves and sieving stock < 6 kg
7.2.2 Dry sieving
For dry sieving, use the dry sieve pan (without outlet) and the dry
clamping lid (plexiglas clamping lid without nozzles).
7.2.2.1 Sieving parameters
Parameters Coarse sample Fine sample
Sieving time 3...20 min 15....30 min
Amplitude 2.5....3 mm 1.5....2.5 mm
In order to achieve an amplitude set point of 3 mm (full deflection), at
least 3 sieves, collecting vessels and clamping lids must be clamped on
the sieve shaker. If fewer sieves are clamped, it may not be possible to
achieve an amplitude set point of 3 mm.
In this case, the sieve shaker controller can no longer set the optimal
working point; the sieve shaker vibrates with a lower amplitude and fre-
quency. The amplitude set point must be reduced accordingly in this
case. When the machine has warmed up, the set point can be increased
accordingly.
7.2.2.2 Sieving aids
To shorten the sieving time, sieving aids can be attached in each of the
sieves that have mesh widths larger than 32 µm. During sieving, the balls
jump on the sieves and accelerate the output of the sieving stock.
The following sieving aids:
n Agate balls
5 mm Ø: 15 pieces per sieve or
n Agate balls
10 mm Ø: 10 pieces per sieve or
n Rubber balls
20 mm Ø: 5 pieces per sieve or
can be used.
Accessories
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