Picojet laboratory jet mill
Efficiently and gently grinding hard and extremely hard materials to fine particle sizes: the Picojet laboratory fluidised-bed opposed jet mill combines high product quality with low-contamination grinding, creating ideal conditions for precise development results. Integration into the Picoline platform is quick and straightforward.
Your benefits at a glance
- Fluidised bed counter jet mill with integrated classifier for contamination-free dry ultrafine grinding of medium-hard to extremely hard materials
- Steep grain distribution and sharp upper grain boundary
- Cool and gentle grinding
- Horizontal nozzle arrangement, nozzles integrated in housing extension
- Compressed air or inert gas operation
- Classifying wheel gap and motor bearing gas flushed
- Designs: Stainless steel and wear-protected (ceramic) version, batch mode or continuous mode operation, different nozzle arrangement
- The design and mode of operation largely correspond to the fluidised bed opposed jet mill AFG series from Hosokawa Alpine
Technical specifications
|
Separation range |
2-120 µm |
|---|---|
|
Grinding to Mohs hardness |
10 |
|
Classifying wheel diameter |
20 mm |
|
Grinding chamber diameter |
40 mm |
|
Classifier speed |
max. 60,000 rpm |
|
Total air volume |
max. 20 Nm³/h |
- The grinding energy is introduced by highly accelerated air jets via several grinding nozzles.
- The ground material is dosed into the grinding container and fluidised by the air jets. The particles are accelerated by the air jets that meet at the focal point. Size reduction is achieved by particle impact at the focal point and by shear flows at the edges of the air jets.
- The grinding air then flows through a classifying wheel located in the head of the mill, where classification takes place. Due to the classifying wheel with air, fine particles can escape from the grinder with the air and are separated in a filter. Coarser particles fall back into the fluidised bed and are crushed further until they have reached the desired fineness.
- The fineness is set via the air volume, the grinding air pressure and the classifier wheel speed.
1 Classifier wheel 2 Classifier drive 3 Grinding chamber 4 Process air
