Hayden Smelter is a copper smelter at Hayden, Arizona, owned and operated by ASARCO. It has a 305 meters (1,001 feet) tall chimney, which is the tallest free-standing structure of Arizona. It processes copper from the Ray mine.

Hayden Smelter
Close up of Hayden Smelter, 2009
General information
Status	Operating
Type	Smelter
Location	Ray Complex Hayden Smelter P.O. Box 8 640 Asarco Avenue Hayden AZ USA 85235
Coordinates	33°0′32″N 110°46′59″W / 33.00889°N 110.78306°W / 33.00889; -110.78306
Completed	1984
Owner	ASARCO
Height	303 meters[1]
Website
https://www.asarco.com/

In 2011, the Environmental Protection Agency took action against the smelter for releasing "illegal amounts of lead, arsenic and eight other dangerous compounds."^[2]