As described in the previous sections, there are a number of choices for a suitable adsorption circuit to recover gold from in-pulp streams.https://www.wyactivatedcarbon.com/products/granular-activated-carbon/]granular activated carbon[/url]
The choice of circuit should be defined as what is most suitable for the process stream. As an example of a typical gold plant, the following two tables demonstrate the impact of choice of circuit. The material is suitable to be treated using CIL, CIP and Carousel Pumpcell circuits. The choice of circuit defines the gold loading on loaded carbon due to upgrade ratio expectations. This is on the basis that gold loss in solution residues is not compromised. The higher the gold loading, the lower the elution requirements.https://www.wyactivatedcarbon.com/products/granular-activated-carbon/activated-carbon-gold-extraction.html]coconut activated carbon gold extraction[/url] Considering that rate of elution is not gold loading limiting, the size of the elution plant is not defined by gold loading on carbon. The cost of elution is defined per ton of carbon, energy being the most significant cost contribution. As can be seen in the second table, significant cost can be saved by choosing the circuit that utilizes the lowest elution requirements. Not all process streams can be evaluated on the basis described: - Process streams containing preg-robbing components (components that adsorb gold in competition to activated carbon) would use CIL. - High grade concentrate circuits downstream from pre-treatment steps such as BIOX, roasting, POX and fine re-milling would have circuits defined to maximizing gold recovery rather that most to favorable operating costs.