Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning 2017-04-21T02:33:06+00:00
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Disposing of post regeneration or spent activated carbon (7 replies)

John Koenig
2 years ago
John Koenig 2 years ago

Disposal of Spent Activated Carbon: How can I safely dispose spent carbon which has long been used in the elution process and how can I verify if the carbon contains any residual gold?

Bill Fraser
2 years ago
Bill Fraser 2 years ago
1 like by James Nkali

All elution processes are not ideal i.e. 100% efficient, which means there will residual gold on the fine spent carbon, so there is no need to verify that. However, you can assay the spent carbon for the amount of residual gold left on the spent carbon. As for the disposal method, the fire destruction method is the best way to use since you will be able to recover the residual gold on the spent carbon. There are the experts too http://www.tigg.com/carbon-disposal.html

Victor Bergman
2 years ago
Victor Bergman 2 years ago

Beware that Сarbon may contain up to 150 g / t gold. Be sure to read http://www.911metallurgist.com/cyanidation/assaying-carbon/

Bob Mathias
2 years ago
Bob Mathias 2 years ago

A small added note: Some tolling smelters which have a significant PGM content in their feed will accept spent carbon and pay for a portion of the gold to obtain the reductant value of the carbon. A conversation with the tolling agent may be advantageous to both parties.

JohnnyD
2 years ago
JohnnyD 2 years ago

In Canada, there are companies who will take the carbon for some percentage of the gold .
This service may be available in your area. All too often, operators think that there is a lot of residual gold left in their carbon, when in fact, there is very little if the elution has been done properly.
A thorough Sampling of the carbon and assay of the sample will tell you how much gold remains.
However, if you really think that there is considerable gold still in the carbon, you can BURN it yourself in a controlled furnace and collect the gold from the residue. This means you must have the process to recover the gold from the ash left after igniting the carbon.
Best to seek out a third party as suggested.

David Kano
2 years ago
David Kano 2 years ago

I think the best method is to burn the carbon and the ash from it can be smelted to get gold.

John Koenig
2 years ago
John Koenig 2 years ago

Thank you for your contributions. I guess i will have to assay the samples thorough. the previous metallurgist tried smelting the ash but did not get the gold.  I'm planning of leaching the ash using cyanide after assaying it.

James Nkali
7 months ago
James Nkali 7 months ago

hi,need help please, i have more than 30 tonnes of eluted activated carbon with 50ppm of Gold and 90 ppm of copper,    i dont want to use Elution machine because its more expensive, am looking forward using Burning Method to extract gold,help me on how to prepare the burning stove and chemicals used during the process.

PM me https://www.911metallurgist.com/messages/

facebook: Jay Nkali
hope to hear from you soon, thanks.

 

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