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    Heap leachingWikipediaHeap leaching is an industrial mining process to extract precious metals, copper, uranium, and other compounds from ore via a series of chemical reactions that absorb HEAP Copyright: © 2017 Yantai Xinhai Mining Machinery Co., Ltd.

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    Heap Leaching. Heap leaching facilitates the profitable extraction of gold from very low grade ore. Prior to heap leaching, either run of mine (ROM) or crushed ore is heaped into structures 10 to 20m high that are stacked on an impermeable layer. A dilute cyanide solution is sprayed on the heap, percolates through the pile and dissolves the available

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    Bio heap leaching is cost effective (U.S. $ 0.34-$0.60 per pound of cathode copper, depending on ore grade) and used to recover other metals such as zinc, nickel, uranium, gold and silver ores. This article by Pradhan gives us a review of the current bio-leaching techniques that are currently being employed in the copper industry.

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