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, with more than 4,500 employees each year we ship 4.5 million net tons of high-quality flat carbon steel to partners in automotive, energy, packaging and construction which are used in increasingly lighter, stronger and more sustainable products – from cans to cars. Our purpose is to produce ever smarter steels that have a positive benefit for people and planet. High performance steels made using innovative processes which use less energy, emit significantly less carbon and reduce costs. Steels that are cleaner, stronger and reusable. With steel at our core, our inventive people and an entrepreneurial culture at heart, we will support the world in making that change. This is what we believe it takes to be the steel company of the future. For more information about ArcelorMittal Dofasco, please visit:

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