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what is an ore concentrator

Vale's Voisey's Bay nickel mine and concentrator is ... Vale's operations in Canada are as varied as the country itself. Learn more about our base metal operations. Berkeley Pit History | PitWatch The Berkeley Pit in 1963, shortly after the construction of the Weed Concentrator seen below the Pit, with the city of Butte, Montana to the bottom and left in the photo. Over the active lifespan of the Berkeley, approximately 320 million tons of ore and over 700 million tons of waste rock were mined from the Pit. Arrastra An Arrastra (or Arastra) is a primitive mill for grinding and pulverizing (typically) gold or silver ore.The simplest form of the arrastra is two or more flat-bottomed drag stones placed in a circular pit paved with flat stones, and .    Read More

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