GoldCopper Ores ScienceDirectJan 01, 2016Today, flotation is commonly used in the processing of primary copper–gold ores to produce a copper concentrate contain copper ore mineral processing copper gold ore mineral processing proce.
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Garpenberg (Fig. 17) is considered the most productive zinc underground mine in the world. In 2017, the mine output was 2.63 Mta of ore, with lead, copper, gold and silver being produced in addition to zinc. The Tara Mine in Ireland is Europe‘s largest zinc mine. The ore is extracted there from a depth of about 1000 m (Fig. 18).
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The first step, mineral processing, is to liberate the copper minerals and remove waste constituents—such as alumina, limestone, pyrite, and silica—so that the copper minerals and other nonferrous minerals of value are concentrated into a product containing between 20 and 30 percent copper. The second step, involving either smelting or leaching, removes a large proportion of impurity elements—in particular iron and, in the case of sulfide ores.
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For some refractory copper oxide ores which are difficult to be processed by flotation, chemical mineral processing method plays an important role, especially the leaching extraction electrowinning process with the advantages of low unit cost, less environmental pollution and strong adaptability, which is bound to be one of the main directions of technical development of refractory copper oxide mines.
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1 Mineral Extraction . Common ores • Usually found in combination with sulphur, iron, carbon and oxygen. Oxide copper minerals malachite azurite chrysocolla. Sulfide copper minerals bornite chalcocite chalcopyrite . Occurrence • Copper is distributed in many parts of the world • Copper minerals are divided up into three groups.
The ore from the mine contains about 2 copper. To get at the copper the first stage is crushing in huge cylindrical ball mills. Ball mills crush the ore into a fine powder. (Courtesy of Rio Tinto.) Stage 2 Froth flotation The powdered ore is mixed with a special paraffin oil which makes the copper mineral.
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