Emissions from blast furnaces occur at charging doors, the slag tap, the lead well, and the
furnace stack. The emissions are combustion gases (including carbon monoxide, hydrocarbons, and
oxides of sulfur and nitrogen) and particulate. Emissions from the charging doors and the slag tap are
hooded and routed to the devices treating the furnace stack emissions. Blast furnace particulate is
smaller than that emitted from reverberatory furnaces and is suitable for control by scrubbers or fabric
filters downstream of coolers