Refining (metallurgy)
Process of purifying metals / From Wikipedia, the free encyclopedia
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For other uses, see Refining.
In metallurgy, refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer.[clarification needed] The processes used are of many types, including pyrometallurgical and hydrometallurgical techniques.
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