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SPECIALIST EQUIPMENT


Too coarse to fl oat


79% of the fl uorite in this fl uorspar fl otation plant is lost as liberated particles larger than 300 microns. T e main reason for fl uorspar losses in this plant is thus “too coarse to fl oat”. T e client was advised to measure and


report the plus 300 micron fl oat feed fraction continually. T e solution is to improve the milling process and thus fl otation.


Locked in non-fl oating gangue


Fluorite (yellow) particles in rougher tails


Rougher Tails Calculated Assay (wt. %) Mass Elemental distribution


F 0.97 Fluorite Total


Wt% 1.98


F


% 93


Too


Summary (wt. %) Well sized


small < 10


micron 0%


10 to 300 micron Liberated


16%


Locked 5%


PGM (red particles) locked in pyroxene (blue)


Too Big >300 micron


79%


T e platinum group metals (PGMs) in this platinum plant’s tailing are mainly present as locked PGMs in the “well sized” (10 to 150 micron) gangue minerals. In this example the locking occurs in pyroxene, which makes up


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