Fans and Air Pollution Control for Ferro Alloy Submerged Arc Furnaces

The process

Submerged arc furnaces for ferro manganese, ferro chrome and ferro silicon produce a hot fume dense with very fine oxide dust. Semi-closed furnaces take it through a cooling system to a large bag filter, and the main ID fan on the clean side is a large volume, continuous duty. Waste heat boilers on the furnace off-gas add an ID fan of their own.

The gas

Ferro alloy furnace fume carries very fine silica and metallic dust at high temperature. Fine dust packs into blade roots, so the wheel is chosen to shed it and the fan is placed after the bag filter.

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
Dilution Air Blower	Injects ambient air into a hot flue gas stream to bring it down to a temperature the downstream bag filter or fan can accept..	Backward curved
Combustion Air Blower	Feeds a burner with air at the pressure the burner register needs.	Backward curved and radial tipped

Air pollution control

Industries

Related processes