2470 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
liberated PGMs, 0.5 mass %PGMs associated with liber-
ated BMS, ~18 mass %PGM is locked, ~47 mass %of
the PGM is attached to gangue oxide or silicate and asso-
ciated with BMS attached to gangue oxide or silicate and
~10 vol %is locked in gangue. More than half of the PGM
grains in the PGM associated with BMS attached to gangue
oxide or silicate and PGM attached to a gangue oxide or
silicate mode of occurrence classes are smaller than 3 μm.
The PGM is associated with a wide range of gangue, which
includes predominantly pyroxene. Most PGM is locked in
pyroxene and associated with BMS attached to pyroxene.
The PGMs are mainly associated with pentlandite, chal-
copyrite and pyrrhotite attached to gangue oxide or sili-
cate. Minor association with these minerals is in the PGM
associated with a BMS, in turn, locked in gangue oxide or
silicate class, with only small amounts of PGM associated
Figure 8. (A) Total PGE minerals GSD data (B) PGE telluride minerals GSD data (C) PGE sulphide minerals GSD data
and (D) PGE arsenide minerals GSD data for the primary and secondary grinds rougher flotation for the various collectors
evaluated
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