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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Recovery of gold from carbon fines (3 replies and 1 comment)

M
martie
5 years ago
martie 5 years ago

Hello has anyone done any work on the stripping of gold from carbon fines with virgin carbon (or regenerated carbon) in a cyanide solution? Or any literature?

T
Todd H
5 years ago
Todd H 5 years ago
Like

The same striping method that work for loaded carbon work for carbon fines, the issue is the retaining the carbon in the strip vessel. Zadra and AARL methods work and there are other methods such as alcohol that can be done at atmospheric pressure.  You cant just strip the carbon with cyanide in a tank, at least not very effectively.  Most people smelt their carbon fines to recovery the gold by first ashing the carbon and then refining it in in a furnace. Alternatively you can sell the carbon fines.

Regards

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

E
Ernie
5 years ago

Hello Todd, on a related issue, we're sitting on about 4 tons of old carbon. We don't want to sell it as such. Can we recover all the gold from it? How does one 'ash' carbon? Can it be done on a SSM effectively? We have lots of old carbon in Zimbabwe that the chinese are trying to get their hands on.
Kind regards
Ernie

E
Ernie
5 years ago
Ernie 5 years ago
Like

Hello Todd, on a related issue, we're sitting on about 4 tons of old carbon. We don't want to sell it as such. Can we recover all the gold from it? How does one 'ash' carbon? Can it be done on a SSM effectively? We have lots of old carbon in Zimbabwe that the chinese are trying to get their hands on.
Kind regards
Ernie

D
DwoodFLS
5 years ago
DwoodFLS 5 years ago
Like

If you fill your elution vessel with course carbon to create a "filter bed" you should be able to put your carbon fines on top of that bed and then strip it normally.  This would all be dependent on how fine your carbon fines are.   

 


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