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

Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction 2017-04-04T06:57:36+00:00
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Carbon harvest time (2 replies)

8 months ago
Louise 8 months ago

I just want to ask on how to calculate the harvest time of carbon in cyanide leaching. Its the time that the carbon will reach 1500 grams/tonne? The carbon loading is linear.

Thank you for answering 🙂

8 months ago
Wayne 8 months ago
1 like by David

Hello Louise,

I am not sure how you are set up, however in our Demonstration plant we had 7 carbon columns arranged in successive order where one would take the overflow from the previous and so on.  We check the last column in line for silver breakthrough at which point we would harvest the last column and when refilled it would become the first column and the rest would get renumbered IE the second last is now last and we would start checking it for Silver breakthrough and so on.  Silver is usually in more plentiful supply and breaks through sooner than gold with gold not far behind so we would change it out when a few ppm silver shows up.

Hope this helps some



4 months ago
Goldman 4 months ago

Hi Louise, did you end up finding an answer to your question, because I'm looking for the same thing. Our set up is 2 Leach tanks and 6 adsorption tanks, will contain approx 3T of carbon in each ads tank. Initial grade going into the circuit will be about 0.7g/t.

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