Mining Facts (pdf)
Investment in technology, training and equipment has made the U.S. mining industry . That includes 2,000lbs of copper, 6,000lbs of aluminum, 1,000lbs of lead,.
NRA ILA . End of an Era: Last U.S. Lead Smelter to Close in December
Oct 25, 2013 . The Herculaneum smelter is currently the only smelter in the United States which can produce lead bullion from raw lead ore that is mined.Get Price