Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction

Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction

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inconsistence in carbon sample Results (1 reply)

6 months ago
simon@p 6 months ago


There is a batch agitation tank that we are operating as a pilot for our ore.

The  problem is that we have been getting a problem of inconsistence in carbon results as they may reach example 380 Au ppm then later on with a good recovery from the solid still the carbon concentration returns back to 260 Au ppm 

Any Comment if there might be a cause for such deviation. 

6 months ago
Jorge 6 months ago

It is important to know the gold extraction from bottle roll tests. Sometimes, tests are not performed correctly and some factors such as the presence of small contents of pre-robbers is not evaluated correctly.  This kind of material has the capacity to adsorb gold. The gold dissolved by the cyanide solution is adsorbed by this material slowly or fast. In the first case, initially, activated carbon adsorbs the gold, and later the pre-robber material. 

Other thing to evaluate is the activated carbon activity. If the carbon is not new, some problem can be expected during the adsorption process. The particle size of carbon is other point to consider. The presence of fine particles of carbon is a problem.

The sampling procedure must be evaluated to make sure the samples are representative. 

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