Copper is a wide-spread metal used in architecture. Buildings have been clad in copper for hundreds of years
Most copper ores contain only a small percentage of copper metal bound up within valuable ore minerals, with the remainder of the ore being unwanted rock or gangue minerals, typically silicate minerals or oxide minerals for which there is often no value. In some cases, tailings have been retreated to recover lost value as the technology for recovering copper
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Old World Copper. Most European copper was smelted out of copper ores starting about 4460 BC. These ores often had only a concentration of 15% copper in them, and had many trace element contaminants, such as lead (Ref.19).
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The process of extracting copper from copper ore varies according to the type of ore and the desired purity of the final product. Each process consists of several steps in which unwanted materials are physically or chemically removed, and the concentration of copper is progressively increased.
Native copper: This is man's first copper ore. Native copper is often alloyed with gold, silver, lead and mercury.Copper is widely distributed in nature. The metal is easily oxidizable and also easily reduced.
WEB QUICK LINKS: Primary = sulphide bearing (unoxidised) 3PRIMARY GOLD ORE OXIDE GOLD ORE PRIMARY COPPER GOLD ORE OXIDE COPPER GOLD ORE
Copper is a chemical element with symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.A freshly exposed surface of pure copper has a reddish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a
4b. Purification of Copper by Electrolysis (extraction from ore above). The impure copper from a smelter is cast into a block to form the positive anode.The cathode is made of previously purified copper.These are dipped into an electrolyte of copper(II) sulphate solution.; When the d.c electrical current is passed through the solution electrolysis
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