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| Ore concentrate ： ウィキペディア英語版 |
Ore concentrate
Ore concentrate, dressed ore or simply concentrate is the product generally produced by metal ore mines. The raw ore is usually ground finely in various comminution operations and gangue (waste) is removed, thus concentrating the metal component.〔
〕 The concentrate is then transported to various physical or chemical processes called hydrometallurgy, pyrometallurgy smelters, and electrometallurgy where it is used to produce useful metals.
==References==
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抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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