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Open-pit mining is primarily utilized as the most efficient method of recovering this metal; the company's three largest such works are the Mission, Silver Bell, and the Ray mines in Arizona. The company had also operated in silver mining in Idaho. Its mines produce 350,000,000 to 400,000,000 pounds (160,000,000 to 180,000,000 kg) of copper a year.
The core business is the production of copper cathodes from copper concentrates, scrap, and recycled materials (copper refining). These include continuous cast wire rods, shaped rods, rolled products and strips, and specialty wire made of copper and copper alloys. Aurubis also processes precious metals.
Grupo México is the largest mine operator in Mexico and Peru, along with the third largest in the United States. The company primarily focused on the extraction of copper. It is the fourth largest copper producer worldwide and controls the largest copper reserves in the world. The company also mines molybdenum, silver, zinc and gold.
Calumet and Hecla Mining Company (1 C, 7 P, 1 F) Pages in category "Copper mining companies of the United States" The following 19 pages are in this category, out of 19 total.
Many copper mines have existed in the Copper Country of the U.S. state of Michigan. These include both large-scale commercial ventures and small operations. These include both large-scale commercial ventures and small operations.
The Ray mine has one of the largest copper reserves in the United States, with proven and probable reserves of 835.7 million tonnes (822,500,000 long tons; 921,200,000 short tons) of ore grading 1.73% copper, as of December 31, 2018. [2] [3] [4] Copper from the Ray mine goes to the Hayden Smelter.
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