At 8:17 a.m., ArcelorMittal Dofasco experienced an emission at the No. 2 Blast Furnace.

The visible emission was from the Blast Furnace’s “bleeder valve” and lasted 12 seconds. “Bleeders” are a safety mechanism: Pressure relief valves that open when high top pressure is experienced at the furnace. 

The emission would have been comprised of primarily carbon monoxide and carbon dioxide and nitrogen. Any particulate in the emission is iron, ore fines, coke fines, carbon and coal.

The Ontario Ministry of Environment, Parks and Conservation’s Spills Action Centre has been alerted and our teams are investigating.

About ArcelorMittal Dofasco

About ArcelorMittal Dofasco ArcelorMittal Dofasco is Canada’s largest producer of flat carbon steel and is part of the world’s largest steel and mining company. Headquartered in Hamilton, ON, our more than 5,000 employees are dedicated to being world class as we strive to transform tomorrow with lighter, stronger and more sustainable steel. For us, steel is the fabric of life, as it is at the heart of the modern world. ArcelorMittal has a presence in more than 60 countries and an industrial footprint in over 20 countries. Guided by a philosophy to produce safe, sustainable steel, we are the leading supplier of quality steel in the major global steel markets including automotive, construction, household appliances and packaging, with world-class research and development and outstanding distribution networks. For more information about ArcelorMittal Dofasco, please visit:

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