Pulacayo Project Feasibility Study - Apogee Silver

Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report
090644-3-0000-20-IFI-100
rougher cell (Imhoflot G cell 1.4, 0400-CL-001/6) and the tailings are directed to the zinc
rougher/scavenger cell (Imhoflot G cell 1.4, 0400-CL-002/7). Similarly, the zinc
rougher/scavenger cell tailings are sent to the zinc scavenger cell (Imhoflot G cell 1.4, 0400-
CL-003/8).
The zinc scavenger tailings are pumped to the paste thickener (backfill area). The zinc
rougher, rougher/scavenger and scavenger concentrates are directed to the zinc cleaner
circuit. Hydrated lime and Aero 3418A collector are added into the cleaner feed pump boxes
(0400-PB-006/8 and 0400-PB-014/16). The zinc cleaner circuit has two flotation cells in
series (two Imhoflot G cell 0.8, 0400-CL-004/9, 0400-CL-005/10).
The final zinc concentrate flows to zinc concentrate surge tank (0400-TK-002) and it is
pumped to the zinc recessed plate pressure filter for dewatering.
17.1.5 Carbon Columns Area
The lead concentrate filter filtrate, zinc concentrate filter filtrate, paste thickener overflow and
run-off water report to three carbon in column (CIC) tanks in series where the copper ions
and organic flotation reagents is adsorbed onto 6 x 12 mesh granular coconut carbon. The
train of CIC tanks is made up of three 2 m diameter x 1 m high columns. The CIC treated
solution water is pumped to the process water tank (1200-TK-006).
17.1.6 Concentrate Filtration Area
Lead concentrate slurry is pumped to the lead concentrate pressure filter, the filter size is
1.4 m x 7.59 m (W x L). The dewatered concentrate (< 10% moisture) is discharged through
a chute onto a belt conveyor and conveyed to the lead concentrate stockpile.
The filtrate solution drains to a pump box and is pumped to the CIC system to adsorb
dissolved metal ions that might be present in solution. The lead concentrate filter section
floor spillage is pumped with the sump pump to the mill discharge pump box.
Zinc concentrate slurry is pumped to the zinc concentrate pressure filter, the filter size is
1.4 m x 8.58 m (W x L). The dewatered concentrate (< 10% moisture) is discharged through
a chute onto a belt conveyor and conveyed to the zinc concentrate stockpile. The filtered
solution is recovered in the pump box, and sent to the CIC system to adsorb the dissolved
metal ions that might be present in solution.
The zinc concentrate filter section floor spillage is pumped with a pump sump to the zinc
section conditioning tank. A vehicle weighbridge will be used to determine the mass of
concentrates dispatched.
17.1.7 Backfill Area
The final zinc flotation tailings slurry is pumped through a series of pumps to an 8.4 m
diameter paste thickener. The thickener overflow reports to flushing water tank (1500-TK-
001), this tank will provide water for piping flushing, to the high shear mixing tank (1500-TK-
004) and to the plant process water tanks. The excess water is pumped to a series of the
carbon columns to adsorb dissolved metal ions and organic flotation reagents before
reporting to the plant process water tanks. The paste thickener underflow is either pumped
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