3.4 FUME SUCTION SYSTEM
existing fume suction system is reused. for ECOARC, existing EAF direct suction ducts shall be modified as below
Eising EAF direct suction ducts consist of a fume collecting duct, a settling chamber, water-cooled ducts, air-cooled ducts and cyclones in order, and finally connected to the existing building suction duct. For the ECOARC, the existing fume collecting duct, settling chamber and a part of water-cooled ducts are removed, and in exchange a combustion chamber , a quenching chamber and inlet/outlet ducts for these chambers are installed. A booster fan is installed to adjust the off gas flow rate for keeping furnace inlet air minimize.