Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning 2017-03-23T09:55:18+00:00
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Recovery of gold from fine carbon ash (5 replies)

Sachin Prakash
1 year ago
Sachin Prakash 1 year ago

I am looking at a quick and cost effective method to recover the gold in the fine carbon ashes we have. Currently we are trying to use smelting but we want to try some other means of getting the gold. Can I try Mercury in amalgamation and also gravity separation, which is feasible?

Standartenfurer
1 year ago
Standartenfurer 1 year ago

Amalgamation (mercury) should not even be considered due to the health and environmental risks. Gravity separation might work, but probably with low recovery because the gold is probably pretty fine sized (if you can see the gold it would probably work).

Smelting and leaching are your two best choices.

Sachin Prakash
1 year ago
Sachin Prakash 1 year ago

Okay. But can it be used to get the gold out of the ash?

Standartenfurer
1 year ago
Standartenfurer 1 year ago

Smelting and leaching have been the recognized methods for recovering gold from ashed carbon. The choice being how much ash! A little smelt, a lot leach.

Sachin Prakash
1 year ago
Sachin Prakash 1 year ago

So we can do both. But I also want to avoid smelting the bulk material because of cost of the reagents, borax.

Ben
8 months ago
Ben 8 months ago
1 like by David

Smelt with  sodium carbonate with a little silica this very much cheaper.  How much bulk material do you have?

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