In the thermodynamic criterion of flotation DGflot ¼ cLV
ðcos h 1Þ, but for correlation purposes, the parameter was needed
that increases with increasing flotation recovery, and that is why in
Fig. 6 the results were plotted in terms of the quantity ð1 cos hÞ.
Fig. 6 shows a very good correlation between oil flotation of
molybdenite and the wettability of molybdenite surface by oil.