Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction

Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction 2017-03-23T09:50:58+00:00
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Gold Heap Leaching Metallurgy (2 replies)

Nyasha Jawanda
10 months ago
Nyasha Jawanda 10 months ago


What are the metallurgical issues considered when planning the construction of a heap leach for gold in oxide ores.

Jorge Ganoza
10 months ago
Jorge Ganoza 10 months ago


There are several points to keep in mind, some of them are listed below,

  • Clay content. Make sure the clay content in the ore was determined properly in the testing program, otherwise there will be percolation problems. As a consequence, the gold extraction will be lower than expected.
  • Cyanicides. They can be dissolved and consume more cyanide. The gold extraction will be lower. The presence of copper oxides could be a problem.
  • The testing program should evaluate the optimum particle size. Gold extraction has an economic and metallurgical optimum point.
  • Pregnant solution should be as clean as possible, otherwise there will be some problems in the recovery system (activated carbon, Merrill-Crowe)
  • Cyanide strength, make sure to use the right one


10 months ago
David 10 months ago

Hi Nyasha and Welcome,

to complement to Jorge's comment, please see:

http://technology.infomine.com/reviews/heapleachpads/welcome.asp?view=full and https://www.911metallurgist.com/blog/heap-leaching

Hope this helps.

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