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
The Run-of-Mine (ROM) will be trucked out of the mine and tipped at the stockpile at
the process plant. The average grades of the RoM product delivered to the plant
have been estimated to be 240 g/t for silver, 1.10% for lead and 1.92% for zinc over
the life of mine.
From the stockpile, the ROM material will pass through a beneficiation plant
comprising a crushing circuit, a milling and cycloning circuit, two sequential floatation
stages (the first for lead and the second for zinc) and a filtration plant, producing a
lead concentrate and a zinc concentrate. The contents and grade of each
concentrate are tabulated below:
Table 22.2: Products of the Process Plant
Lead Concentrate Zinc Concentrate
Pb (%) 48 1.12
Zn (%) 6.53 51
Ag (g/t) 7.438 411
Fe (%) - 2.19
Si (%) - 1.93
As (%) 1.48 0.03
Sb (%) 1.25 0.04
Bi (%) 0.03 -
The two concentrates will then pass through the sales process. The quantities of
concentrate and the cost per equivalent silver ounce over the mine life are shown in
the table below:
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