STRAIGHT GRATE
VT CORP PVT. LTD. |
ROTARY GRATE KILN
Chinese Solutions |
| Ø |
Suited for hematite and magnetite ores |
Ø |
Preferably suited for magnetite ores |
| Ø |
Drying, Preheating, Induration, Cooling Cycle are carried out in a single unit |
Ø |
Drying, preheating, Induration, Cooling cycles are carried out in different units. |
| Ø |
Generation of fines is a bare minimum, as double deck roller screen is installed for screening |
Ø |
Sufficient transfer points for generation of fines. |
| Ø |
No ring formation/ accretion |
Ø |
Fines create accretion problems and affect the productivity. |
| Ø |
Power and fuel consumption lower |
Ø |
Power and fuel consumption higher because of seal leakage. |
| Ø |
Efficient thermal process |
Ø |
Less efficient thermal process |
| Ø |
Waste heat recovery system, a feature of process. |
Ø |
Difficult waste heat recovery system |
| Ø |
Less maintenance oriented |
Ø |
More maintenance oriented |
| Ø |
Larger no. of installations over the world. |
Ø |
Higher wear of refractories because kiln refractories are subjected to thermal cycling each revolution & abrasion from pellets. |
| Ø |
Refractory life is longer because refractory lined hood is stationary and at constant temperature. |
Ø |
All repairs of the grate component occurs “off line”. The complex chain grate in the grate kiln process must be shut down & cooled for maintenance. |
| Ø |
Modular design of traveling grate allows removal and replacement of single pellet in about 5 minutes while process temperatures are maintained. |
Ø |
Higher dust loading in the gas handling system. |
| Ø |
Lower dust loading in the gas handling system. |
|
|
