The process
Basic oxygen converters produce a short, intense burst of hot, carbon monoxide rich gas at each blow. The gas is cooled and cleaned in a wet scrubber or dry ESP and drawn by an ID fan that is sized for the peak of the blow and built for the gas to be flared or recovered. Secondary dedusting takes the fume at charging and tapping into a bag filter.
The gas at the fan
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 duty
| Construction | Stainless steel or lined vessel with mesh pad or vane pack sized for the droplet load |
| Density at the fan | At about 200°C the gas density is close to 0.75 kg/m³, 62% of standard air. Pressure developed and power drawn fall in the same ratio, so the selection is made at this density and the motor is checked at cold start. |
Separates entrained liquid droplets from a vapour or gas stream, ahead of a compressor, a fan or a stack. Client-stated blade types for the Mist Eliminator in general: Demister Knockdown Vessel.
Industries
Other fans in bof steel converters
Mist Eliminator in other processes
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.