Copper retains much of the luster that lent Arizona the unofficial nickname "Copper State," and is king in rural Greenlee ...

Only two U.S. smelters are active — Freeport-McMoRan’s east of Phoenix in Miami, Arizona, and Rio Tinto’s in Utah ... water ...

Only two U.S. smelters are active — Freeport-McMoRan’s east of Phoenix in Miami, Arizona ... for any new smelter even with current regulations,” he said. Featherstone took issue with ...

Freeport-McMoRan, the Phoenix-based company ... The resulting copper grains are either shipped to a smelter in Miami-Globe or mixed into a solution where days of electrolysis in a local plant ...