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, 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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