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Stamp mills are used by miners to crush valuable ore and extract the metals within them. Gold, silver, and copper are common metals that are found within ore, and stamp mills allow these metals to be released from rock for further processing and refining.
Of the world's known mineral reserves of gold ore, 50 percent is found in South Africa, and most of the rest is divided among Russia, Canada, Australia, Brazil, and the United States. The largest single gold ore body in the world is in the Witwatersrand of South Africa.
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The Humboldt mill is a former iron ore processing plant site that has been converted and refurbished to process Eagle ore. Ore is processed using a conventional threestage crushing and single stage ball mill process flotation to produce separate nickel and copper concentrates.
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