The process
Smelting and roasting of sulphide concentrates gives hot, dusty gas with sulphur dioxide. Gas cleaning ahead of the acid plant uses cyclones, ESPs and scrubbers, and the fans between them handle acidic, abrasive gas in resistant materials.
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 |
|---|---|---|
| Fume Exhaust System | Hoods, ducting and an exhaust fan that capture fume at source and deliver it to a scrubber, bag filter or stack. | Backward inclined and radial tipped |
| 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 |
| 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 |