Fig. 9 demonstrates that the tested non-shear degraded flocculant
depresses strongly molybdenite flotation; depressing effect of
the flocculant was quite dramatic starting at 1–2 ppm flocculant
concentration and was total at 5 ppm. These micro-flotation tests
(in a Partridge and Smith, 1971 cell were carried out with a fine
molybdenite (65/+200 mesh, 210/+74 lm) prepared by
crushing a massive high purity natural crystal of molybdenite. A