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
Table 13.4 Specific Gravity Testwork Summary
Sample ID ED&ED Lab SG Tests (*) UTO Lab BBWi Tests
Grind Cut True Specific (**)
Size P100, mm Mesh, µm Gravity
Min - - 2.71
Max - - 3.02
Average - - 2.85
Standard Deviation (SD) - - 0.11
Design (Average + 1.8xSD) - - 3.05
(**) Method of pycnometer, (*) results taken from ED&ED metallurgical program which will be
addressed after.
13.2.4 Flotation Test work
The focus of the flotation test work was on lead (and therefore silver) recovery and both
batch open circuit and closed circuit flotation tests were conducted to derive the metallurgical
performance predictions. Investigations into copper-lead separation were not carried out.
Determination of likely recoveries in an actual industrial scale flotation plant with recycling of
intermediate streams requires closed circuit flotation testing. These tests were carried out in
accordance to the flowcharts shown in Figure 13.1 and Figure 13.2.
Sample
Classification
149 µm (100#)
(+)
(-)
Pb-Ag Conditioning
(Collector/Frother/Depresor
/pH Regulator)
Milling
Pb-Ag Rougher
Flotation
Tails
Conc
Pb-Ag
Cln N 2
Tails
Pb-Ag Cleaner N 1
Flotation
Zn-Ag Conditioning
(Collector/Frother/Activator/
pH Regulator
Pb-Ag Cln N 1
Tails
Particle Size Analyses
(PSD)
Conc
Pb-Ag Cleaner N 2
Flotation
Conc
Zn-Ag Rougher
Flotation
Zn-Ag Ro.
Tails
To
Quarter
Sedimentation
Test
Zn-Ag
Cln N 2
Conc
Zn-Ag Cleaner N 1
Flotation
Zn-Ag Cln N 1
Tails Tails
To
Cycloning
Conc
Zn-Ag Cleaner N 2
Flotation
Zn-Ag Conc.
Pb-Ag Conc.
Figure 13.1 Locked Cycle Test (LCT) Flowchart – No Desliming
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