Air Classifier — sharp cuts, on or off the mill.
Variable-speed rotor cage and tangential air flow split a powder stream into fine and coarse fractions with a tunable cut from 5 to 500 µm. Bolts to any THOR mill or runs as a standalone separator.
- Range
- 5 – 500 µm cut
- Throughput
- 0.5 – 20 t/h
- Power
- 5 – 75 kW
- Wear
- Hardened classifier wheel
What it is.
The Air Classifier is the precision-sorting half of every THOR fine-grinding line. A vertical rotor cage spins inside a counter-flow air stream — particles fine enough to be carried by the air pass through the cage to the fines outlet; the rest spirals back to the feed inlet (or to scrap).
How it works.
Cut size = f(rotor speed, air-flow rate, particle density). All three are operator-tunable from the touch-panel; the same controls used on every THOR mill. Pair the classifier with a Hammer or Pin mill for closed-circuit grinding, or run it alone to fractionate an existing powder.
Specs envelope.
Cut 5 – 500 µm. Throughput 0.5 – 20 t/h. Cage motor 5 – 75 kW; air-flow 1 – 30 m³/s depending on cut. Standard SS304 / SS316L; hardened cage for abrasive feeds.
Where it earns its keep.
Use the Air Classifier when a hammer or pin mill alone cannot deliver the upper limit on coarseness, when you want to recover an oversized fraction for re-sale, or when you need to remove fines from an off-spec powder.
Other platforms.
The rest of the THOR family. Compare or pair — air classifying is often integrated with a mill.