Wellgreen Project Preliminary Economic Assessment ... - OTCIQ.com

Test: F36 Project: 11603-005 50149-001 Date: Feb 23 2012 Operator: YW
Purpose: Split flowsheet, CMC and Guar 50:50 mix similar to F-35, but more aggressive for recovery
Procedure: As below.
Feed: 2x2 kg of -10 mesh Master Composite
Grind:
Regrind
57 minutes/2 kg at 65% solids in a lab mill
Regrind 8 minutes in the pebble mill (Ni clnr 1 concentrate) Feed K80 : 90 µm
Ni regrind K80: µm
Conditions:
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX CuSO4 CMC Guar MIBC* Grind Cond. Froth pH Eh
Grind 57
Bulk Rougher 1 15 30 30 12 1 3 8.3 110.7
Bulk Rougher 2 20 20 20 1 3 8.4 55.2
Ni Scav 1 30 200 6 8.2 137.2
Ni Scav 2 30 6
Ni Scav 3 30 6 8.2 16.4
Combine Ro Conc 1-2
Bulk 1st Cleaner A 10 10 2 8.4 70.9
B 10 2
Bulk 2nd Cleaner A 0 5 5 2 8.2 101.1
B 5 2
Combine Scav Conc 1-3
Ni 1st Cleaner 20 15 15 3 8.3 81.3
10 3
Regrind (PM) 8
Ni 2nd Cleaner 20 50 5 5 4 8.4 67.5
Ni 3rd Cleaner 10 2.5 2.5 3 7.8 44.2
Total 0 200 250 87.5 87.5 12 65 2
*As needed
45
Stage Rougher 2nd clnr
3rd clnr
Flotation Cell 2000 g D-12 500 g D-12 250 g D-12
Speed: r.p.m. 1500 1600
1200
Metallurgical Balance
Product
Weight Assays, (Pt, Pd, Au g/t), (Cu, Ni, S, Fe, MgO %) % Distribution
g % Cu Ni Pt Pd Au S Fe MgO Cu Ni Pt Pd Au S Fe MgO
Bulk 2nd Clnr Conc. 126.5 3.22 8.85 8.94 2.22 6.79 0.72 26.6 32.1 4.77 80.1 59.3 20.9 55.3 29.6 28.7 8.4 0.7
Bulk 2nd Clnr Tail 46.1 1.17 0.38 1.67 1.50 1.52 0.18 6.55 14.0 21.4 1.3 4.0 5.2 4.5 2.74 2.6 1.3 1.2
Bulk 1st Clnr Tail 126 3.21 0.18 0.59 0.87 0.67 0.06 3.81 11.6 22.8 1.6 3.9 8.2 5.5 2.46 4.1 3.0 3.4
Ni 3rd Clnr Conc 111.1 2.83 0.41 1.32 1.30 0.78 0.17 30.8 47.3 5.23 3.3 7.7 10.8 5.6 6.06 29.2 10.8 0.7
Ni 3rd Clnr Tail 52.7 1.34 0.32 0.75 1.42 0.75 0.14 16.0 29.9 14.9 1.2 2.1 5.6 2.6 2.40 7.2 3.2 0.9
Ni 2nd Clnr Tail 85.1 2.17 0.28 0.50 0.94 0.39 0.08 12.3 26.4 16.3 1.7 2.2 6.0 2.1 2.21 8.9 4.6 1.6
Ni 1st Clnr Tail 150 3.82 0.15 0.27 0.65 0.43 0.09 2.48 11.9 22.7 1.6 2.1 7.3 4.1 4.14 3.2 3.7 4.0
Ni Scav Tail 3232 82.2 0.04 0.11 0.15 0.10 0.05 0.59 9.75 23.2 9.2 18.6 36.1 20.4 50.4 16.2 64.9 87.6
Head (calc.) 3929 100.0 0.36 0.49 0.34 0.40 0.08 2.99 12.4 21.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 0.41 0.45 0.04 2.53 11.9 22.8
Bulk 2nd Clnr Conc 126.5 3.22 8.85 8.94 2.2 6.79 0.72 26.6 32.1 4.8 80.1 59.3 20.9 55.3 29.6 28.7 8.4 0.7
Bulk 1st Clnr Conc 172.6 4.39 6.59 7.00 2.0 5.38 0.58 21.2 27.3 9.2 81.3 63.3 26.1 59.8 32.3 31.2 9.7 1.9
Bulk Rougher Conc 298.6 7.60 3.88 4.29 1.54 3.40 0.36 13.9 20.7 14.9 83.0 67.2 34.3 65.2 34.8 35.3 12.7 5.2
Ni 3rd Clnr Conc 111.1 2.83 0.41 1.32 1.3 0.78 0.17 30.8 47.3 5.2 3.3 7.7 10.8 5.58 6.06 29.2 10.8 0.7
Ni 2nd Clnr Conc 163.8 4.17 0.38 1.14 1.3 0.77 0.16 26.0 41.7 8.3 4.5 9.8 16.3 8.13 8.46 36.3 14.1 1.6
Ni 1st Clnr Conc 248.9 6.33 0.35 0.92 1.2 0.64 0.13 21.3 36.5 11.1 6.2 12.0 22.3 10.3 10.7 45.3 18.7 3.2
Ni Scav Conc 398.9 10.2 0.27 0.67 0.99 0.56 0.11 14.2 27.2 15.4 7.8 14.1 29.6 14.4 14.8 48.4 22.4 7.2
Bulk Rghr+Scav Conc 697.5 17.8 1.82 2.22 1.23 1.77 0.22 14.1 24.4 15.2 90.8 81.4 63.9 79.6 49.6 83.8 35.1 12.4
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S other Cp Pn Po Ga Cu Ni S Cp Pn Po Ga
Bulk 2nd Clnr Conc. 126.5 3.22 8.85 8.94 26.6 55.6 25.6 25.8 23.6 25.0 80.1 59.3 28.7 80.1 69.9 13.1 0.87
Bulk 2nd Clnr Tail 46.1 1.17 0.38 1.67 6.55 91.4 1.10 4.58 12.1 82.3 1.3 4.0 2.6 1.3 4.5 2.4 1.05
Bulk 1st Clnr Tail 126 3.21 0.18 0.59 3.81 95.4 0.52 1.46 8.15 89.9 1.6 3.9 4.1 1.6 3.9 4.5 3.1
Ni 3rd Clnr Conc 111.1 2.83 0.41 1.32 30.8 67.5 1.18 2.50 76.6 19.7 3.3 7.7 29.2 3.3 5.9 37.4 0.6
Ni 3rd Clnr Tail 52.7 1.34 0.32 0.75 16.0 82.9 0.92 1.43 39.4 58.3 1.2 2.1 7.2 1.2 1.6 9.1 0.8
Ni 2nd Clnr Tail 85.1 2.17 0.28 0.50 12.3 86.9 0.81 0.83 30.4 67.9 1.7 2.2 8.9 1.7 1.5 11.4 1.6
Ni 1st Clnr Tail 150 3.82 0.15 0.27 2.48 97.1 0.43 0.56 5.55 93.5 1.6 2.1 3.2 1.6 1.8 3.7 3.9
Ni Scav Tail 3232 82.2 0.04 0.11 0.59 99.3 0.12 0.16 1.29 98.4 9.2 18.6 16.2 9.2 10.8 18.3 88.0
Head (calc.) 3929 100.0 0.36 0.49 2.99 96.2 1.03 1.19 5.79 92.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 2nd Clnr Conc 127 3.22 8.85 8.94 26.6 55.6 25.6 25.8 23.6 25.0 80.1 59.3 28.7 80.1 69.9 13.1 0.9
Bulk 1st Clnr Conc 173 4.39 6.59 7.00 21.2 65.2 19.0 20.2 20.5 40.3 81.3 63.3 31.2 81.3 74.4 15.6 1.9
Bulk Rougher Conc 299 7.60 3.88 4.29 13.9 77.9 11.2 12.3 15.3 61.2 83.0 67.2 35.3 83.0 78.4 20.1 5.1
Ni 3rd Clnr Conc 111 2.83 0.41 1.32 30.8 67.5 1.18 2.50 76.6 19.7 3.3 7.7 29.2 3.3 5.9 37.4 0.6
Ni 2nd Clnr Conc 164 4.17 0.38 1.14 26.0 72.4 1.10 2.16 64.6 32.1 4.5 9.8 36.3 4.5 7.6 46.5 1.5
Ni 1st Clnr Conc 249 6.33 0.35 0.92 21.3 77.4 1.00 1.70 52.9 44.4 6.2 12.0 45.3 6.2 9.1 57.9 3.1
Ni Scav Conc 399 10.2 0.27 0.67 14.2 84.8 0.79 1.27 35.1 62.8 7.8 14.1 48.4 7.8 10.9 61.6 6.9
Bulk Rghr+Scav Conc 698 17.8 1.82 2.22 14.1 81.9 5.26 5.98 26.6 62.1 90.8 81.4 83.8 90.8 89.2 81.7 12.0