The process
The arc furnace fume system takes hot primary fume from the fourth hole through a drop-out box and cooler, and secondary fume from the canopy hood, into a large bag filter. The main fume fan is a large volume duty at moderate temperature after the filter, with dampers balancing primary and secondary flow.
The gas
Fume from arc, induction or reverberatory furnaces, hot and carrying fine metallic oxide dust. Temperature is handled by dilution air or a cooler ahead of the filter, and the fan sits on the clean side where possible.
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 electric arc furnace steelmaking
Dampers in other processes
Waste Heat Recovery BoilersCement Preheater KilnsVertical Roller Raw MillsClinker Grate CoolersRotary Lime KilnsSponge Iron Rotary KilnsBlast Furnace Hot Blast StovesSinter PlantsLadle 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.