The process
Cement grinding in ball mills or vertical mills needs a vent fan to carry heat and fines out of the mill, a separator fan where the circuit has one, and air slide blowers to move the product to the silos. Cement dust is fine and abrasive, and the fans sit after bag filters.
The gas
Hot gas that has dried the raw meal and now carries the fine product toward the separator and collector. Very heavy fine dust loading; the impeller is built for wear and balanced to tolerate build-up.
Fans in this process
| Duty | What it does here | Type usually selected |
|---|---|---|
| Bag Filter Fan | Pulls the process gas through the filter bags and discharges the cleaned gas to the stack. | Backward curved and radial tipped |
| Dust Collector Fan | The fan behind a bag filter, cyclone or multiclone on a dust extraction system. | Backward inclined and radial tipped |
| Air Slide Blower | Supplies low pressure aeration air to the fabric of an air slide, fluidising cement, raw meal or gypsum so it flows down the slide.. | Backward curved and radial tipped |
| Hot Air Fan | Circulates or supplies air at elevated temperature to a dryer, oven or kiln. | Backward curved and backward inclined |
| High Pressure Blower | Delivers combustion, aeration and conveying air where the system resistance runs to several thousand millimetres of water column in a single stage.. | Backward curved and radial tipped |
Industries
Related processes
Waste Heat Recovery BoilersCement Preheater KilnsVertical Roller Raw MillsBall Mill Raw GrindingClinker Grate CoolersCement Plant Coal MillsCement Packing and DispatchRotary Lime KilnsVertical Shaft Lime KilnsGypsum Calcining PlantsRotary DryersMineral Crushing and ScreeningCaptive Power PlantsPneumatic Conveying SystemsSilo Aeration and FluidisationAlternative Fuel Handling in Cement Plants