The process
Straight grate and grate-kiln pellet plants move very large volumes of hot process gas between the drying, firing and cooling zones with process fans, and extract dust at the balling and screening. The process fans run hot and dusty at large size, and the gas flows are switched by dampers.
The gas
Sinter strand waste gas carries ore and flux fines with acid components from the sulphur in the fuel. Wear and corrosion both act on the wheel; material and liner selection follow the gas analysis.
Fans in this process
| Duty | What it does here | Type usually selected |
|---|---|---|
| ID Fan | Sits at the outlet of a boiler, kiln or furnace and draws the flue gas through the plant to the stack. | Backward curved, backward inclined and radial tipped |
| Hot Air Fan | Circulates or supplies air at elevated temperature to a dryer, oven or kiln. | Backward curved and backward inclined |
| Combustion Air Blower | Feeds a burner with air at the pressure the burner register needs. | 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 |
| Bag Filter Fan | Pulls the process gas through the filter bags and discharges the cleaned gas to the stack. | Backward curved and radial tipped |
Air pollution control
Industries
Related processes
Waste Heat Recovery BoilersRotary Lime KilnsVertical Shaft Lime KilnsSponge Iron Rotary KilnsBlast Furnace Hot Blast StovesSinter PlantsCoke Oven BatteriesElectric Arc Furnace SteelmakingInduction Furnace Melt ShopsLadle Furnaces and Secondary MetallurgySteel Reheating FurnacesHeat Treatment FurnacesForge ShopsFerro Alloy Submerged Arc FurnacesIron and Non-ferrous FoundriesHot Dip Galvanising Lines