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Air classifiers/Particle Separators

Air classifiers/Particle Separators

Air classifiers/Particle Separators

We are interested in air classifiers. Units referred to as "aspirators" are usually designed to take dust and fines out of larger particles. They often rely on turbulance to stir the material and the waste material is channeled through a fan. This is not the right approach for us. We want to separate the fractions of the material by air resistance/density, want to keep all the fractions, and don't want them damaged or wet. Since we are "separating", not "cleaning", turbulance tends to upset the separation, not help it. Even some of the "elutriators" I've looked at rely far too much on impact for separation, and we don't want the damage. Primarily we are interested in particles that are 5-10 mm diameter with a general bulk density of about 45 lbs/cu ft.  Any leads for equipment, standards, approaches/concepts, methods, etc. appreciated

RE: Air classifiers/Particle Separators

I don't know if this is related to what you want, but a comany call Farr deal with air filters for a wide variety of vehicles and have a wide range of products. Might be worth contacting them just to see what is on offer.


Brian Hurley

RE: Air classifiers/Particle Separators

blow the particles up a stack, slightly rotate the plume, and seperate at different heights / diameters of a cone or cyl?

How about run 'em up a FAST conveyor belt and launch 'em?

You should get a nice ballistic distribution where they land.

one belt throws onto a faster belt, onto a faster belt step-up system would avoid sudden large accelerations.


RE: Air classifiers/Particle Separators

Pull the particles through a series of cyclones , as the air slows only the finer particles are carried through into the second cyclone etc . The design of the cyclones will determine the particulate size deposited at each stage .

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