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These three facilities have a combined annual capacity of 1.5 million metric tonnes. Codelco, not surprisingly, is the world's largest producer of copper. In 2014, the company produced nearly 400,000 tonnes more copper than the world's second largest producer, Aurubis. Flash-continuous technology is used in more than half of all refinieries (about 70 percent), while world refinery capacity utilization in 2013 was estimated to be nearly 80 percent.
(Rio Tinto: 100 per cent). Kennecott Utah Copper (KUC) operates the Bingham Canyon mine, Copperton concentrator and Garfield smelter and refinery complex, near Salt Lake City, US. KUC is a polymetallic mine, producing copper, gold, molybdenum and silver.As the second largest copper producer in the US, KUC supplies more than 13 per cent of the nation's annual refined copper requirements and it employs approximately 1,800 people.s the second largest copper producer in the US, KUC supplies more than 13 per cent of the nation's annual refined copper requirements and it employs approximately 1,800 people.