HarryLee1506
Active member
Yes, thank you very much for your advices...
Gold recovery from smelter slags
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The first thing you should ask is if these leach agents are so good why are they not being used by the gold industry.
The answer is that these leach agents will certainly leach gold but will also leach many other metals which cyanide alone will not leach.
These other metals will load onto carbon thus reducing the loading capacity for gold.
When you want to strip the gold from the carbon these metals cause a further problem in that they do not dissolve in cyanide alone and will lock most of the gold into the carbon.
Recovery is only achieved by ashing the carbon and digesting the ash in aqua regia or cyanide.
You can use ion exchange resins instead of carbon, you will get the same problems on a much more expensive adsorbent.
Deano
The answer is that these leach agents will certainly leach gold but will also leach many other metals which cyanide alone will not leach.
These other metals will load onto carbon thus reducing the loading capacity for gold.
When you want to strip the gold from the carbon these metals cause a further problem in that they do not dissolve in cyanide alone and will lock most of the gold into the carbon.
Recovery is only achieved by ashing the carbon and digesting the ash in aqua regia or cyanide.
You can use ion exchange resins instead of carbon, you will get the same problems on a much more expensive adsorbent.
Deano
If you roast any refractory sulphide gold/ silver/ pgm ore types you can crush up your slag (since slag is considered refractory in nature) and roast it with your cons..
