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tailings also called mine dumps culm dumps slimes tails refuse leach residue or slickens terra-cone terrikon are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore

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home » gold » history of gold gold a brief history of gold uses prospecting mining and production republished from a usgs general interest publication by harold egyptian gold artisans of ancient civilizations used gold lavishly

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gold cyanidation also known as the cyanide process or the macarthur-forrest process is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex it is the

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two dominant methods account for the vast majority of underground coal mining room and pillar and longwall mining in room and pillar mining seams of coal are partially mined leaving large pillars of coal intact to support the

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mining this page primarily focuses on metallurgical mining though many of the terms processes and concepts are the same within the non-metallurgical extraction industry these other industry sectors include gas and oil

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