SATAKE i High-precision Wet Classifier

Classifier can arbitrarily adjust the particle size distribution of submicron (several hundred nanometers) to single micron (several micrometers) fine particles present in slurry.Adjustment is performed by removing fine particles (small particles) or by removing coarse particles (large particles).Particle diameter to be removed can be freely controlled by the rotational speed of the rotor.
Classifier features removing with higher precision than conventional machines.

• Flow path
When raw slurry is pumped into the classifier, some fluid passes between the blades of the rotor and goes inside the rotor.
Fine slurry passes through the hollow shaft and is discharged outside the machine.
Meanwhile, coarse slurry is discharged from the classifying rotor by centrifugal force and re-supplied as raw slurry.

• Classifying rotor
Classifier's classifying rotor is designed with an optimal shape based on many classification tests and CFD flow analysis optimization so that the classification particle diameter is constant in the classification chamber. We succeeded in straightening the flow inside the classification chamber and the rotor, dramatically improving classification accuracy.

• Principle of classification
The particles at the outer end of the rotor are acted upon by the centrifugal force generated by the rotational motion of the fluid and the drag (buoyancy) caused by the radial movement of the particles.
There is a particle size "= classification particle diameter" where these external forces are exactly balanced.
Particles larger than the classification particle diameter (coarse particles) receive a large centrifugal force and cannot enter the rotor because they move outward. Particles smaller than the classification particle diameter (fine particles) can enter the rotor by riding on the liquid flow, and only these fine particles are recovered outside the machine as slurry.