Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning 2017-03-23T09:55:18+00:00
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Extraction of Au from Ash Fine Carbons (15 replies and 3 comments)

Rahil Khan
1 year ago
Rahil Khan 1 year ago

I want to know if it is possible to extract the gold in ashes fine carbons. Smelting is the method I know could be used but i want to know if anyone has another recoverable method. Remember, it’s an ashed fine carbon we are trying to extract. Intensive Leach of the Ash Possible!

Carl Jenkins
1 year ago
Carl Jenkins 1 year ago

Leaching and smelting are your best choices.

Oberfuhrer
1 year ago
Oberfuhrer 1 year ago

You can read ''gold production from fine carbon to coarse carbon'' it is an article which published US patent office. It published 2003-2004.

You can get fine carbon's gold to coarse carbon. While running this process coarse carbon getting fine so it is not useful! Gold recover is max % 63 at this process. I tried different methods for gold recovery from fine carbons. Ashed method is more effective so.

mlticzon
7 months ago

OP, I think this is the link to what Oberfuhrer's referring to. https://www.google.com/patents/US6228334. Although I'm not sure if this have been applied commercially.

Rahil Khan
1 year ago
Rahil Khan 1 year ago

What methods did you used to recover the Au from the fine carbons then?
I understand that's the best choice but is there any other alternative method that is really cost effective and feasible as or than the smelting and leaching?

Carl Jenkins
1 year ago
Carl Jenkins 1 year ago

If you can see the gold, gravity might work, otherwise smelting and leaching are the simplest and easiest to use. Unless you want to be real cutting edge and experimental and then look at (and no I have never used it) http://is.gd/ZtTWxq

mishaka
7 months ago

Carl I have not understood your above comment , if I don'tmiss the point the topic was about to recover gold from ashed carbon . now how do you smelt the ashed and do smelting pls help me

Oberfuhrer
1 year ago
Oberfuhrer 1 year ago

I used solution method in met-lab. It based on adsorption and desorption differences. If you mixed coarse carbon and fine carbons and use 10k ppm cyanide with 11.5 pH you can get approximate 60 percent of gold from fine carbons. What is the gold assay fine carbon? It’s important. I just know Australian company uses same method with 90 percent gold recovery. But they did not share their methods. I estimated it and applied on met lab.

Rahil Khan
1 year ago
Rahil Khan 1 year ago

The fine carbons were loaded to about 750ppm. Also the one we are trying is already ashed and I want to know the methods best used. We haven’t really seen coarse gold. Unless that can form upon ashing of the fines. We thought it could be separated by gravity and the concentrate smelted. This is purely for the concentrating purposes. To avoid smelting the bulk ashed material!

Carmen Ibanz
1 year ago
Carmen Ibanz 1 year ago

Depend on amount of carbon fines generated in your plant. You can collecting the fines carbon and shipped to the refinery monthly basis will be more robust economically rather than treated on site.

David Kano
1 year ago
David Kano 1 year ago

We have reprocessed ashed carbon fines in the past through an existing flotation concentrate leach circuit. The circuit includes two stages fine and ultra-fine grinding. Recoveries were in excess of 95% as I recall. We hope to implement a commercial carbon incinerator that will provide a high grade ash that can be directly smelted.

mishaka
7 months ago

David can you help me on the chemicals you applied in making a concentrate from the ashed carbon

Rahil Khan
1 year ago
Rahil Khan 1 year ago

Do you mean we can subject the ash to flotation and leach the concentrate again or smelt the flotation concentrate?Currently we a gold treatment plant, so we treat gold hence the majority of the metal in the ash is obviously gold.

Jean Rasczak
1 year ago
Jean Rasczak 1 year ago

It’s a good idea for do assays with 2 or 3 flotation cells.

Rahil Khan
1 year ago
Rahil Khan 1 year ago

Want to do a lab analysis on the ash carbons and see if the gold can be concentrated in the froth phase or the tails phase.

David Kano
1 year ago
David Kano 1 year ago

We have a concentrate regrind and leach circuit. This is where we added the ash for leaching and recovery.

Carl Jenkins
1 year ago
Carl Jenkins 1 year ago

If it is coarse, then gravity would work.

mpelera
11 months ago
mpelera 11 months ago
1 like by David

smelt carbon then acid treatment for recovery gold( ashed carbon treat with sulphuric acid then nitric acid later on top with water and some flocculants for the gold to settle down(calcine) decant and then smelt the calcine after drying

mishaka
7 months ago
mishaka 7 months ago

Rahil khan , please help me what have you come learn about the cheap way to recover gold from the ashed carbon.

I would like to know in what form is good in ashed carbon?  I know during gold cyanidation is in form of Au(CN)2 and is adsorbed on the activated in the same state what happen when your ash the activated carbon? In what form will the gold be? Please help.

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