Metallurgists track flotation performance through composite concentrate assays and daily plant balance calculations, but both are lagging indicators. Reagent dosing decisions - frother, collector, pH modifier - are made by operators using visual froth observation and shift-level experience, without reference to real-time grade-recovery curve position. Circuit instability caused by feed mineralogy shifts, pyrite activation events, or froth collapses develops over hours before it appears in the assay data, and by then the cumulative recovery loss across multiple cells can be substantial.
Built For
Metallurgist managing a 48-cell rougher-scavenger-cleaner flotation circuit processing copper-molybdenum ore with variable pyrite content
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Process / Plant Engineer
Tracks grade-recovery curve position across flotation banks and correlates reagent dosing, froth depth, and air flow with concentrate grade and metal recovery.
Mine Geologist / Grade Control
Characterizes incoming feed mineralogy and provides advance notice of ore domain changes that will require reagent suite adjustments.
Mine Planner / Operations
Connects production scheduling decisions to plant recovery targets by managing ore blend composition and processing rate.
Lumina tracks grade-recovery curve position across individual flotation banks by correlating cell-level air flow, froth depth, pull rate, and reagent dosing against cleaner concentrate grade, detecting circuit instability signatures hours before they appear in composite assay results.
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Rougher cells 4 through 6 have drifted about 3.2 recovery points below the circuit grade-recovery curve over the last 48 hours, and the slide tracks a collector dosing cut from 38 to 31 g/t made two shifts ago as pyrite content in the feed rose. The froth-depth and air-flow readings on those cells are within range, so the loss is reagent-driven rather than hydrodynamic. Recommend restoring collector to 38 g/t and adding a 12 g/t lime step to depress the activated pyrite; expect roughly 2.5 points of copper recovery back within the shift.