The smelter at Superior, completed in 1924, and the surrounding roaster, furnaces and converter operated for nearly half a century before the Magma Copper Co. closed them in 1971.

The district court judge in Phoenix called for a 60-day delay to allow advocates for Oak Flat to review an upcoming U.S. Forest Service environmental impact statement.

The release of the Final Environmental Impact Statement marks one of the final steps toward transferring Oak Flat to Resolution Copper.

It was hot. It was dirty. It was dangerous. But it was a job for thousands. Anaconda's smelter was a lifeline to immigrants and the lifeblood of a town that depended on the jobs it provided ...

Local business owners in Superior, Arizona say a major copper mining project could revitalize the area's economy.

The industry will need to overcome high energy and labor costs, environmental regulations and a glut of cheap Chinese ...

One of the only two copper smelters in the country is set to close in outback Queensland in 2030, and experts worry the commodity's production could be taken out of Australia's hands.

China's Sinomine Resource Group said on Friday it has temporarily paused copper smelting operations at its Tsumeb plant in Namibia, citing a shortage of concentrate following a rapid expansion in ...

The Tsumeb smelter is one of the few facilities in the world that can treat arsenic and lead-bearing copper concentrates. Copper $ 4.8335 / lb -0.36% Brent Crude Oil $ 77.01 / bbl 1.17% ...

Launched in 2024, the Aeris project feasibility study aimed to evaluate the copper smelter’s path to achieving a yearly arsenic concentration of 15 nanograms per cubic meter (ng/m3) in ambient air.

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Asarco upgraded the Hayden smelter to meet U.S. air-pollution rules as part of a 2015 settlement with the ... Eight of Arizona’s top 10 ranked releases in 2018 came from copper mines and smelters.