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

Test: F37 Project: 11603-005 50149-001 Date: Feb 23 2012 Operator: YW
Purpose: Split flowsheet, CMC and Guar 50:50 mix similar to F-36, no CMC or Guar in the roughers
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
Conditions:
Ni regrind K80: µm
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 12 1 3 8.8 76.3
Bulk Rougher 2 20 6 1 3 8.8 8.9
Ni Scav 1 30 200 6 6 8.7 32.5
Ni Scav 2 30 6 8.5 38.9
Ni Scav 3 30 6 8.3 11.2
Combine Ro Conc 1-2
Bulk 1st Cleaner A 10 10 2
B 10 2 8.4 74.0
Bulk 2nd Cleaner A 0 5 5 2 8.3 71.5
B 5 2
Combine Scav Conc 1-3
Ni 1st Cleaner 20 15 15 3 8.5 74.1
10 3 8.4 21.4
Regrind (PM) 8
Ni 2nd Cleaner 20 50 5 5 4
Ni 3rd Cleaner 10 2.5 2.5 3 7.9 87.6
Total 0 200 250 37.5 37.5 24 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. 119.7 3.01 10.8 8.56 1.88 6.27 0.94 29.2 30.9 4.30 81.5 53.3 13.9 51.7 39.4 24.2 7.3 0.6
Bulk 2nd Clnr Tail 52.1 1.31 0.37 1.97 1.58 2.00 0.21 7.34 13.9 21.4 1.2 5.3 5.1 7.2 3.7 2.6 1.4 1.3
Bulk 1st Clnr Tail 145 3.64 0.16 0.63 0.84 0.62 0.14 4.45 11.7 22.2 1.5 4.7 7.5 6.2 7.1 4.5 3.3 3.9
Ni 3rd Clnr Conc 137.5 3.46 0.44 1.69 3.02 0.31 0.37 32.1 46.7 5.36 3.8 12.1 25.7 2.9 17.7 30.5 12.6 0.9
Ni 3rd Clnr Tail 43.4 1.09 0.41 0.83 1.71 0.91 0.15 18.1 30.4 14.3 1.1 1.9 4.6 2.7 2.3 5.4 2.6 0.7
Ni 2nd Clnr Tail 79.8 2.01 0.28 0.54 0.39 0.26 0.17 17.4 30.3 13.5 1.4 2.2 1.9 1.4 4.7 9.6 4.7 1.3
Ni 1st Clnr Tail 111 2.79 0.17 0.29 0.70 0.41 0.14 2.27 10.9 22.4 1.2 1.7 4.8 3.2 5.6 1.7 2.4 3.0
Ni Scav Tail 3286 82.7 0.04 0.11 0.18 0.11 0.02 0.94 10.2 22.4 8.3 18.8 36.5 24.7 19.5 21.4 65.7 88.3
Head (calc.) 3974 100.0 0.40 0.48 0.41 0.37 0.07 3.64 12.8 21.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 0.41 0.45 0.04 2.53 11.9 22.8
Bulk 2nd Clnr Conc 119.7 3.01 10.8 8.56 1.9 6.27 0.94 29.2 30.9 4.3 81.5 53.3 13.9 51.7 39.4 24.2 7.3 0.6
Bulk 1st Clnr Conc 171.8 4.32 7.64 6.56 1.8 4.98 0.72 22.6 25.7 9.5 82.7 58.6 19.0 58.9 43.2 26.8 8.7 2.0
Bulk Rougher Conc 316.6 7.97 4.22 3.85 1.35 2.98 0.45 14.3 19.3 15.3 84.2 63.3 26.5 65.1 50.3 31.3 12.0 5.8
Ni 3rd Clnr Conc 137.5 3.46 0.44 1.69 3.0 0.31 0.37 32.1 46.7 5.4 3.8 12.1 25.7 2.9 17.7 30.5 12.6 0.9
Ni 2nd Clnr Conc 180.9 4.55 0.43 1.48 2.7 0.45 0.32 28.7 42.8 7.5 4.9 14.0 30.2 5.7 20.0 36.0 15.2 1.6
Ni 1st Clnr Conc 260.7 6.56 0.39 1.19 2.0 0.40 0.27 25.3 39.0 9.3 6.3 16.2 32.2 7.1 24.6 45.6 19.9 2.9
Ni Scav Conc 371.6 9.35 0.32 0.92 1.61 0.40 0.23 18.4 30.6 13.2 7.5 17.9 37.0 10.3 30.2 47.3 22.3 5.9
Bulk Rghr+Scav Conc 688.2 17.3 2.11 2.27 1.49 1.59 0.34 16.5 25.4 14.2 91.7 81.2 63.5 75.3 80.5 78.6 34.3 11.7
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. 119.7 3.01 10.8 8.56 29.2 51.4 31.2 24.7 26.2 17.9 81.5 53.3 24.2 81.5 64.1 10.7 0.60
Bulk 2nd Clnr Tail 52.1 1.31 0.37 1.97 7.34 90.3 1.07 5.44 13.4 80.1 1.2 5.3 2.6 1.2 6.1 2.38 1.16
Bulk 1st Clnr Tail 145 3.64 0.16 0.63 4.45 94.8 0.46 1.55 9.8 88.2 1.5 4.7 4.5 1.5 4.9 4.8 3.6
Ni 3rd Clnr Conc 137.5 3.46 0.44 1.69 32.1 65.8 1.27 3.55 79.0 16.2 3.8 12.1 30.5 3.8 10.6 37.0 0.6
Ni 3rd Clnr Tail 43.4 1.09 0.41 0.83 18.1 80.7 1.18 1.58 44.5 52.8 1.1 1.9 5.4 1.1 1.5 6.6 0.6
Ni 2nd Clnr Tail 79.8 2.01 0.28 0.54 17.4 81.8 0.81 0.74 43.7 54.7 1.4 2.2 9.6 1.4 1.3 11.9 1.2
Ni 1st Clnr Tail 111 2.79 0.17 0.29 2.27 97.3 0.49 0.63 4.90 94.0 1.2 1.7 1.7 1.2 1.5 1.9 2.9
Ni Scav Tail 3286 82.7 0.04 0.11 0.94 98.9 0.12 0.14 2.21 97.5 8.3 18.8 21.4 8.3 10.1 24.8 89.3
Head (calc.) 3974 100.0 0.40 0.48 3.64 95.5 1.15 1.16 7.38 90.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 2nd Clnr Conc 119.7 3.01 10.8 8.56 29.2 51.4 31.2 24.7 26.2 17.9 81.5 53.3 24.2 81.5 64.1 10.7 0.6
Bulk 1st Clnr Conc 171.8 4.32 7.64 6.56 22.6 63.2 22.1 18.9 22.3 36.7 82.7 58.6 26.8 82.7 70.2 13.1 1.8
Bulk Rougher Conc 316.6 7.97 4.22 3.85 14.3 77.7 12.2 10.9 16.6 60.3 84.2 63.3 31.3 84.2 75.1 17.9 5.3
Ni 3rd Clnr Conc 137.5 3.46 0.44 1.69 32.1 65.8 1.27 3.55 79.0 16.2 3.8 12.1 30.5 3.8 10.6 37.0 0.6
Ni 2nd Clnr Conc 180.9 4.55 0.43 1.48 28.7 69.3 1.25 3.08 70.7 25.0 4.9 14.0 36.0 4.9 12.1 43.6 1.3
Ni 1st Clnr Conc 260.7 6.56 0.39 1.19 25.3 73.1 1.12 2.36 62.4 34.1 6.3 16.2 45.6 6.3 13.4 55.5 2.5
Ni Scav Conc 371.6 9.35 0.32 0.92 18.4 80.3 0.93 1.84 45.3 52.0 7.5 17.9 47.3 7.5 14.9 57.3 5.4
Bulk Rghr+Scav Conc 688.2 17.3 2.11 2.27 16.5 79.1 6.11 6.03 32.1 55.8 91.7 81.2 78.6 91.7 89.9 75.2 10.7