Smith emphasizes that her legislation would not ban or restrict existing or potential mining projects outside the Rainy River watershed.

WASHINGTON - A bill that would permanently protect the Boundary Waters Canoe Area Wilderness from sulfide mining was ...

The future of copper mining lies in urban mining. AI-driven scrap sorting leads the way. Cities become key material sources. Efficient recycling networks emerge. Waste shrinks. Recovery rates climb.

4. What are the types of copper ore? There are two distinct types of copper deposits: sulfide ore and oxide ore. Currently, the most common source of copper ore is the sulfide ore mineral ...

The court sided with the MPCA, which rejected U.S. Steel's request to allow sulfate levels nearly eight times higher than the ...

The permits could have allowed Antofagasta’s Twin Metals Minnesota to significantly expand its proposed sulfide-ore copper mine at the edge of the Boundary Waters Canoe Area Wilderness in northeastern ...

But as the researchers explain in their new Nature Food study, iron ore reacts naturally with hydrogen sulfide gas to form ...

As ore compositions change due to depletion of ... The Cu POX process is a proven hydrometallurgical method for the treatment of copper sulfide concentrates at lower capacities.

Beverly Chomiak is interested in high-grade metamorphic rocks and metamorphosed ore deposits, particularly stratabound and volcanogenic massive sulfide deposits. Her specialty is studying fluid ...