Media Concentrators, DMS

Systems with a narrow range of particle size but with a range in densities. Bird number (mass of solids with a 0.1 density variation from the cut density) 15 Bi 25 relative density ratio 1.25 to 1.5 usual particle diameter 10 mm. 

Choose media with density between desired cuts. For media with density 1.2 to 2.2 use magnetite for 2.9 to 3.4 use ferrosilicon. Use mixtures for intermediate densities 2.5 to 15 kg/s m of pool area. 

Prescreen feed to eliminate fines and day. Consider DMS before liberation grinding. 

Rod deck screen particle diameter 0.75 to 8 cm. Use scalp, dewater and separate. Sieve bend particle diameter 45 to 2000 pm Use dewater, separate intermediate and fines 45 to 4750 pm. 

Revolving screen Trommel particle diameter 3 mm to 50 cm feed solids concentration 5 to 25%. Use separation. 

---