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Rio Tinto Group is a British-Australian multinational company that is the world's second largest metals and mining corporation (behind BHP). It was founded in 1873 when a group of investors purchased
a mine complex on the Rio Tinto, in Huelva, Spain, from the Spanish government. It has grown through a long series of mergers and acquisitions. Although primarily focused on extraction of minerals, it also has significant operations in refining, particularly the refining of bauxite and iron ore. It has joint head offices in London, England and Melbourne, Australia.