The extrapolated ore fragmentation and copper sulphide liberation plots reveal that the liberation levels and hence the flotation responses of the minerals would be essentially constant across a broad range of flotation feed sizing. This observation would indicate that flotation feed sizing coarser than 200µm K80, the practical norm for copper porphyry ore processing worldwide, could be utilized as a key process design parameter, with some considerable degree of confidence.

50% Liberation is the practical norm for copper porphyry ore processing worldwide.