Metallurgy is the science and technology regarding the extraction of metals from ores and their purification for the use. Ores are the minerals from which the metal can be separated economically. In the meanwhile, ores contain several types of impurities such as soil, sand and rocky substances along with the metal compounds. These impurities are known as gangue. Now, metals can be extracted from their ores using various methods of separation. The process of extraction of metal in a pure state from the ores is also a part of metallurgy.
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