Gravitational inertial air classifiers
The design of the Metso gravitational inertial air classifier uses air flow, gravity and directional changes to achieve material cut points from 63 - 300 microns (230 to 50 mesh).
Gravitational inertial classifiers are suitable for:
- Dry production of manufactured sand from crushed rock aggregate suitable for replacing natural sand (see user's experiences)
- Industrial mineral and mining applications
- Removing ultrafines giving significantly increased throughput on fine screens and increased production
Main benefits of Gravitational inertial classifiers are:
Dry solution
- No permit required for water
- No space required for ponds
- No drying required for asphalt sands means big oil savings
- Dry products are easy to handle
- Moisture control of the end product
- Suitable for arid and arctic applications
Environmentally sound solution
- Maximizes aggregate production from quarry
- Reduces dependence of quarry on natural sand suppliers
- Reduced natural sand dependence reduces hauling distances
- Engineered sand offers longer term sand production solutions
- Minimises waste disposal:
- Retains ultrafines not requiring removal
Main features of Gravitational inertial classifiers are:
- Exceptionally low operation and maintenance costs
- Ceramic lining makes extremely abrasive applications possible
- Simple Vane Rack changes every 12-24 months only taking 3-4 hours
- Classifier has no moving parts
- Very low maintenance requirements
- Quiet running equipment
- No dust leakage as operates in negative pressure
