Pulacayo Project Feasibility Study - Apogee Silver

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Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 Parameter Unit Value Mean % 2.78 Specific Gravity Design - 2.65 Range - 2.65 3.02 Mean - 2.85 Crushed Ore Bulk Density - 1.67 Moisture Content % 810 Abrasion Index (Ai) Design - 0.4 Clays Content - - Yes Bond Rod Mill Work Index Design kW-h/t - Bond Ball Mill Work Index Design kW-h/t 14.8 Range kW-h/t 13 14.6 Mean kW-h/t 14 Bond Crusher Work Index Design kW-h/t 16.3 Angle of Repose Coarse Ore º 35 Angle of Repose Fine Ore º 42 Angle of Drawdown º 70 OPERATING PHILOSOPHY General Plant Throughput (Maximum Throughput) t/y 360,000 t/d 1,000 Life Of Mine (LOM) y 12.5 Operating Days Per Year Nominal d/y 360 Operating Hours Per Day Nominal h/d 24 Operating Hours Per Year Nominal h/y 7,446 Crushing Operating Schedule Crushing Operating Hours Per Year Design h/y 7,446 Crushing Overall Availability % 86.2 Shifts - 2 Design h/shift 12 Concentrator Operating Schedule Milling Operating Hours Per Year Design h/y 7,446 Milling Availability % 86.2 Shifts - 3 Design h/shift 8 TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 169
Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 The Pulacayo concentrator plant is designed to operate based on three 8 hour shifts per day. The overall availability design for is 86.2%, this will allow sufficient downtime for planned and unplanned maintenance process plant equipment. The processing plant is designed to process 1,000 t/d and recover the base metals through the process described in Figure 17.1 TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 170
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NI 43 — 101 TECHNICAL REPORT PULA
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Pulacayo 1 000 t/d Phase I Feasibil
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