La Presse

A new green life for mine tailings
Hélène Baril

The residual mine tailings from Quebec's asbestos mines are increasingly coveted for the other minerals they contain. A Quebec company, ECO2 Magnesia, will produce magnesium oxide on the former Carey mine site in the Chaudière-Appalaches region.

The project, which will require an investment of 150 million dollars, has just reached an important milestone with the confirmation of its low carbon footprint. "A very big step," says Paul Boudreault, president of Sigma Devtech, the firm that is leading the project.

The ECO2 Magnesia technology, developed by the Institut national de la recherche scientifique (INRS), has been validated by an independent study by COOP Carbone, which establishes that it emits up to 30 times less greenhouse gases than conventional processes used to produce magnesium oxide.

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