ASARCO » MillingThe two types used in the Mission South Mill are called SAG (semi-autogenous grinding) mills and ball mills. SAG mills . It represents less than one percent of the material removed from the mine. Concentrate is just a fine powder of the mineral chalcopyrite which is a naturally occurring compound of copper, iron, and sulfur.ASARCO » MiningAsarco currently operates three copper mine properties in Arizona: The Ray Complex mine and mill, between Hayden and Superior, Arizona; The Silver Bell mine and SX/EW plant, northwest of Tucson, Arizona; The Mission Complex mine and mill, south of Tucson. The Mineral Discovery Center is located at the Mission.
Mill (grinding) - WikipediaSAG mills are characterized by their large diameter and short length as compared to ball mills. The inside of the mill is lined with lifting plates to lift the material inside the mill, where it then falls off the plates onto the rest of the ore charge. SAG mills are primarily used at gold, copper and platinum mines with applications also.Copper extraction - WikipediaCopper extraction refers to the methods used to obtaining copper from its ores. The conversion of copper consists of a series of chemical, physical, and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. As in all mining.
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