Sure Loki, yes there would be an additional opex cost for the flot and UFG circuit if it was in addition to the the oxide circuit, certainly not onerous though.
If the crusher and primary ball mills are running at 4 mtpa for the refractory ore component of Konks, and let us say the flotation mass recovery is 4%, then, the UFG gold recovery circuit is sized for 160 000 tpa, with the balance of the ore, 3 840 000 tpa being the flotation tail (oxide component) being conventionly leached and gold recovered, then yes, the overall cash cost per oz produced will be higher than a conventional 4 mtpa oxide circuit.
Now if, there is no oxide component in the Konks refractory ore component, there would be no requirement to leach the flotation tail (3 840 000 tpa), only the UFG gold recovery circuit would be operated, ie processing 160 000 tpa, with the flot tails going directly to the tailings dam. If this is the case then the cash cost per oz will be much lower than a conventional 4 mtpa oxide circuit.
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