A small Ontario town is preparing to take on an outsized role in the global race for critical minerals, as work advances on what would be North America's first battery-grade cobalt refinery. Once the plant is up and running, it is expected to produce roughly 4% of the world's cobalt supply, a foothold in a market long dominated by other countries. The project has become a focal point in the broader push to build a homegrown supply chain for the minerals that power modern technology.
At the heart of the operation is a chemical process that transforms mined cobalt rock into a refined final product known as crystallized cobalt sulfate. Inside the facility, a primary leach vessel is where sulfuric acid is introduced to pull the metals out of their solid form and into solution. Operators adjust the pH levels and temperatures at each stage of the process, with the goal of delivering a final product that carries a high concentration of cobalt and a low concentration of impurities.
Much of what the refinery produces already has a destination. About 60% of the output is earmarked for the South Korean company LG Energy Solutions, a major battery manufacturer. Even so, the material will have to undergo testing to guarantee its quality before the customer accepts it, with strict specifications governing exactly how much cobalt and how few impurities the end product must contain.
The refinery is also tied to a larger strategic effort. Both Canada and the United States have made moves to guarantee a domestic supply of critical minerals, including through this project and through agreements with other countries. The involvement of Ontario governments and the U.S. Department of Defense underscores how cobalt, once a niche industrial material, has become a question of economic and national security.
Rather than trying to invent a new approach, the company behind the plant is deliberately following a proven path. The effort has been described as a Western company copying what is already happening in China, the dominant player in cobalt refining. There have been cases of others attempting to reinvent the wheel in this field, the project's backers note, and several of those attempts ended in spectacular failure, which is why this venture is playing it safe.
For industry advocates, the significance lies in the refining stage itself. The executive director of the Canadian Critical Minerals and Materials Alliance argues that this midstream piece could be Canada's key contribution to the supply chain, at least at first. If there is cobalt available in Canada, the country could eventually stop importing it as the operation scales up, though doing so is difficult and demands considerable talent and a tolerance for risk.
The timeline is ambitious, with construction expected to finish early next year and production ramping up by the end of 2027. While some in the industry are pushing to reduce reliance on cobalt for lithium-ion batteries, the owner of the company retooling the Ontario plant says there is still strong demand for the metal, including from militaries, suggesting the refinery's output will find buyers well beyond the consumer battery market.