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My plant uses a rather unusual pH 8 Galena-Sphalerite bulk float.
Main contaminants of concentrate in the form of Silica, Magnetite, Pyrrhotite and Fe amphibole. Very high degree of liberation with minimal lockings - Entrainment is in part responsible but not the whole story. It seems that with overdosage of acid iron minerals are floating.
Does anyone have any depressants or strategies they think would help to depress Silica, Magnetite, Pyrrhotite and/or Fe amphibole?
Thanks,
Bob