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  • Thiosulfate leaching of gold—A review - ScienceDirect

    This is achieved by washing the heap in water to displace soluble acid and iron salts. The washed heap is further neutralised by blending in lime or soda ash. A schematic diagram of the heap leach process used by Newmont Gold Co during the thiosulfate leaching stage is shown Figure 14.

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    Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore using a series of chemical reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ...

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    * Not detected 3.7 Flow sheet of process Based on the above mentioned results, solvent extraction by TBP is a suitable method for the recovery of gold from the leaching solutions of copper refining anodic slime. Accordingly, the flowchart of Fig. 8 is recommended for gold recovery from the leach liquor.

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  • Heap leaching a stack of gold | MiningFeeds

    Apr 25, 2018· Heap leaching can take anything from a couple of months to several years. In the case of gold recovery, heap leaching generally requires 60 to 90 days to leach the ore, compared to the 24 hours required by a conventional agitated leach process. Gold recovery is also usually only 70% compared with 90% recovery in an agitated leach plant.

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