Followingtable is self explanatory for the Selection of Dense or Lean Phase System.
| COMPARISON CHART FOR LEAN PHASE AND DENSE PHASE SYSTEM |
| |
| NO | PARAMETER | LEAN PHASE | DENSE PHASE |
| 1 | Capacity (Q) | Q<50 TPH | 1<Q<500 TPH |
| 2 | Loading Ratio ‘u’
Kg of Solids /Kg of Air | 0<u<10 | 2<u<100 |
| 3 | Conveying Distance L | L<400 MTR Pressure
L<100 MTR Vacuum | 5<L<500 |
| 4 | Particle shape | Any except needle & squeezed | Sharpe edge & interlocking not at all acceptable |
| 5 | Particle characteristics | Not recommended for highly abrasive material like sand, alumina | Any |
| 6 | Air retention | No matter | Good |
| 7 | Air velocity | Start 18-22m/s
End 22-30m/s | Start 3-9m/s
End 9-15m/s |
| 8 | Prime mover & pressure | Blower, less than 1 bar. | Compressor more than 1 bar. |
| 9 | Loading Equipment | Rotary valve and Ventury | Pressure vessel and
high pr. valve |
| 10 | Power required | 2 to 2.5 kw per Ton | 1 to 1.5 kw per Ton |
| 11 | Economics | Economical for low tonnage & short distance i,e less than 100 mtr | Economical for high tonnage & longer distance. |
| 12 | Operation | Simple in operation w/o many interlock | Instruments & interlocking required |