An example of a copper metallurgy study where the effect of primary grind on rougher flotation each of the GeoMetallurgical samples was investigated.
A simple economic study was conducted on these copper flotation results, using typical power costs and a net smelter revenue value for copper of 90 cents. This indicated that the optimum grind was about 140 µm to 150 µm. This should be reviewed if copper prices continue to improve. The results for gold metallurgy were less conclusive, as the grade/recovery relationship was marginally better for the coarsest grind in three cases.