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

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

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Heap Leaching - outflows (2 replies)

antz001
6 years ago
antz001 6 years ago

I would like to determine and/or calculate accurate the outflows for a gold heap leach?

J
Jorge
6 years ago
Jorge 6 years ago
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1 like by David

You need the information listed below,

  • pad area
  • ore tonnage
  • natural ore moisture (e.g. 3% w/w)
  • moisture retained by the ore (e.g. 15% w/w)
  • NaCN irrigation rate (e.g. 10-12 l/h/m2)
  • leaching period (e.g. 60 days)

The idea is to determine the solution cyanide solution added over the heap and the total moisture retained by the ore. 

T
Todd H
6 years ago
Todd H 6 years ago
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Question: are you trying to determine how much liquid is flowing out of a heap leach in an actual ditch or are you trying to model the flows of a heap leach with a solution balance?

For a solution balance Jorge is correct - if you want more accuracy than you need to include more items like irrigation evaporation, pond evaporation, precipitation.  I have modeled heaps many times and I have developed an excel spreadsheet for both a dynamic model to predict solution grades and a static model to determine  makeup water or discharge conditions for the heap.

Google heap water balance and you can find a lot of information.

Regards

Todd Harvey - Global Resource Engineering http://www.global-resource-eng.com


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