The process
Lime is burnt in rotary kilns at steel plants, paper mills and chemical works. The kiln ID fan draws hot, dusty gas through a cooler or dilution and a bag filter, the combustion air blower feeds the burner, and shell cooling fans protect the refractory in the burning zone.
The gas
Kiln gas with lime dust, hot and abrasive, and hygroscopic where moisture is present. Wear protection and a design that resists caking on the blades.
Selection for this process
| Type | Guillotine for isolation, multi louver or butterfly for control, diverter where the gas is switched between two paths |
| Material | Mild steel |
| Sealing | Seal air arrangement where tight shut-off is needed on hot or dusty gas |
Types, construction and performance of the dampers.
Industries
Fans in rotary lime kilns
Dampers in other processes
Waste Heat Recovery BoilersCement Preheater KilnsVertical Roller Raw MillsClinker Grate CoolersSponge Iron Rotary KilnsBlast Furnace Hot Blast StovesSinter PlantsElectric Arc Furnace SteelmakingLadle Furnaces and Secondary MetallurgySteel Reheating FurnacesFerro Alloy Submerged Arc FurnacesCopper and Zinc SmeltingGlass Melting FurnacesCeramic Tunnel and Roller KilnsWaste IncineratorsRefinery Fired HeatersNuclear Facility VentilationBOF Steel ConvertersIron Ore Pellet Plants
Information needed to select or quote
- Gas volume and temperature. Actual flow at the inlet, normal and upset temperature, moisture.
- Dust or pollutant. Inlet loading, particle size distribution, whether it is abrasive, sticky, hygroscopic or combustible; for gases, the species and concentration.
- Required outlet. The emission limit or clean gas concentration the unit must meet.
- Site. Available space and height, material of construction preferences, and how the collected material is to be discharged.