8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

Hot blast superheating using a hot mixer equipped with plasma torches promises to reduce the blast furnace coke consumption and carbon footprint while increasing blast furnace productivity. Countermeasures to keep the hot blast refractory below its service temperature limit were developed using computational fluid dynamic (CFD) modeling and evaluated at the pilot plant scale. The operation of the hot blast stoves with a plasma torch equipped hot mixer will be explained. The payback period for hot blast superheating ranges from satisfactory to good based on blast furnace cost savings and the value of the additional steel production.