- Caused by strong agglomerates based on high surface
forces common powder classifying systems achieve only very small
fines recovery efficiencies at the required fineness. To
increase the fines recovery efficiency PMT and its experts
in the field of ultrafine powder classification have developed
a classifier with high shear forces applied to the particles.
- The self developed and patented so called Motor-Rotor-Unit
is also part of these ultrafine classifiers to define the final product
with its known accurate top cut.
- For classifying the speed of the system can reach values up to 190
m/s circumferential speed, leading to median particle
size values of the final product in the sub-micron range
(d50 < 0.5 µm analyzed by Laser Granulometer).
- Easy adjustment of the fineness by regulation of
the speed of the rotor.
- Easy adjustment of the product load by changing the speed
of the coarse outlet to optimize the fines recovery
for each particle size range.
- Because of these highly efficient advantages the design
of the rotor and the special control mechanism was filed
for patent.
- Easy handling of the rotor unit during maintenance.
- The basic size of the machines is given by a rotor with
260 mm diameter. The single classifying unit is built for approx.
4,000 - 6,000 m3/h air volume and the twin classifying unit for
approx. 8,000 - 12,000 m3/h.
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