Following up on the update sent to the CLC on Saturday, October 1, describing the 15-second blast furnace “bleeder pop” that occurred at approximately 12:30 a.m., we received a community inquiry and photographs yesterday about black smoke possibly emanating from an industrial stack in Hamilton.

We wanted to advise you how we responded to that inquiry:

“Yesterday, the blast furnace teams were still working to recover from the earlier bleeder pop conditions. During the recovery time, it is normal practice to use steam in the process which is then periodically vented from the top of the furnace.  The venting can happen from time to time over the next few days until the furnace recovers back to normal production. The photos you shared display a period (around 18:36 on Oct. 3rd) when this venting was happening. As is typical with steam, it can also appear much darker (depending on the observer’s position) with certain angles of sunlight such as in the morning and evening.”

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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