The effects of AuCarb™ series activated carbon products in different gold processing techniques

Heap Leaching

Low grade surface deposits and waste rock are candidates for Heap Leaching.Recoveries of up to 85% can be achieved using Aucarb^TMAC series.

Carbon In Column (CIC)

Appropriate for cases where gold is already in solution (such as with runoff, soluble gold in a water source, overflow, return water from a tailings dam, etc.), Activated carbon columns in series or parallel flow mode are used to collect gold using packed beds or a fluidized bed (if there is excessive Total Suspended Solids). Packed beds can achieve gold recovery efficiencies greater than 95%; efficiencies of 50-70% per stage are noted with fluidized beds.

Carbon In Pulp (CIP)

Activated Carbon is added directly to the pulp (cyanated ore slurry). Crushed, ground and leached pulp is mixed with Activated Carbon which flows countercurrent to the pulp in a series of semi-batch adsorbers。Because of the product’s superior hardness, Aucarb^TMACexhibits low attrition during movement, agitation, and activation.The high adsorption rate and capacity of Aucarb^TMAC series permit gold recoveries as high as 98%.

Carbon In Leach (CIL)

Activated carbon is added directly to the vessels in which the cyanidation process is taking place. Adsorption with Aucarb^TMAC series can result in recoveries of 97-98% of the gold compared to a 50% recovery rate with conventional cyanidation techniques. Naturally present carbon competes with the activated carbon for the gold. Therefore, after oxygenation, the cyanidation process is carried out simultaneously as activated carbon is brought into contact with ore in the mixers. The superior initial adsorption rate of the Aucarb^TMAC series minimizes interference with gold recovery associated with “preg robbers” in the ore and thereby results in improved leaching efficiency.