Leaching and smelting are your best choices.

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.

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?

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

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.

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!

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.

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.

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.

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

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.

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

If it is coarse, then gravity would work.

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

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.