Zinc and Lead. Back to Metals Minerals. Our zinc and lead assets in Canada consist of CEZinc, General Smelting of Canada, Kidd Operations and Matagami Mine. The CEZinc Refinery in SalaberrydeValleyfield, Quebec is the second largest zinc refinery in North America. CEZinc has been an important part of the community since 1963 and employs 574 ...