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

Test: F34 Project: 11603-005 50149-001 Date: 10-Feb-12 Operator: YW
Purpose: Split flowsheet
Procedure: As below.
Feed: 2x2 kg of -10 mesh Master Composite
Grind: 57 minutes/2 kg at 65% solids in a lab mill
Regrind 4 minutes in the pebble mill (bulk clnr 1 concentrate)
Regrind 6 minutes in the pebble mill (Ni clnr 1 concentrate) Feed K80 :90 µm
Cu regrind K80: 38 µm
Conditions: Ni regrind K80: 36 µm
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX 4037 CMC Guar gum MIBC* Grind Cond. Froth pH Eh
Grind 57
Bulk Rougher 1 20 40 12 1 2 8.9 98.2
Bulk Rougher 2 5 40 2 8.9 39.4
Ni Scav 1 30 40 4 8.8 39.7
Ni Scav 2 30 4 8.8 -42.1
Ni Scav 3 30 4
Combine Ro Conc 1-2
Bulk 1st Cleaner 0+0+2.5 10+5 5 2+1 8.8 72.9
Regrind (PM) 4
Bulk 2nd Cleaner 2 10 2 2.5 8.4 87.2
Bulk 3rd Cleaner 0+2 5 2.5 3 8.1 114.5
Combine Scav Conc 1-2
Ni 1st Cleaner 20+5 30 10 5 3 8.8 72.7
Regrind (PM) 6
Ni 2nd Cleaner 10+10 10 5 2+2 8.7 86.4
Ni 2nd Cleaner Scav 5100: 5 g/t 3477: 5 g/t 2
Total 0 117 0 150 35 31.5 67 1 26.5
*As needed
Stage Rougher 2nd clnr 3rd clnr
Flotation Cell 2000 g D-12 500 g D-12 250 g D-12 PSA On Bulk Regrind
Speed: r.p.m. 1500 1600 1200 PSA On Ni Regrind
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 3rd Clnr conc 32.1 0.82 23.2 3.65 2.51 12.0 1.41 29.2 30.2 2.34 60.4 6.8 4.7 20.3 25.2 8.9 1.9 0.1
Bulk 3rd Clnr Tail 16.2 0.41 4.80 11.0 3.21 13.4 0.49 19.6 24.9 9.92 6.3 10.4 3.0 11.4 4.4 3.0 0.8 0.2
Bulk 2nd Clnr Tail 96.0 2.44 1.59 6.48 2.41 5.14 0.21 12.8 21.6 15.8 12.4 36.3 13.6 26.0 11.2 11.6 4.2 1.7
Bulk 1st Clnr Tail 69.0 1.75 0.10 0.43 0.79 0.34 0.04 2.65 11.1 24.3 0.6 1.7 3.2 1.2 1.5 1.7 1.5 1.9
Ni 2nd Clnr Conc 16.0 0.41 3.11 7.05 9.33 7.69 1.12 29.6 42.3 3.69 4.0 6.6 8.8 6.5 10.0 4.5 1.4 0.1
Ni 2nd Clnr Scav.Conc 13.8 0.35 0.44 2.19 3.81 1.86 0.20 23.8 37.3 8.30 0.5 1.8 3.1 1.4 1.5 3.1 1.0 0.1
Ni 2nd Clnr Scav. Tail 35.8 0.91 0.29 1.44 2.14 1.09 0.13 16.7 31.2 12.4 0.8 3.0 4.5 2.1 2.6 5.7 2.2 0.5
Ni 1st Clnr Tail 164.3 4.18 0.19 0.52 1.04 0.63 0.05 5.27 15.3 22.0 2.5 5.0 10.0 5.5 4.6 8.2 5.0 4.1
Ni Scav Tail 3489 88.7 0.04 0.14 0.24 0.14 0.02 1.61 11.7 23.2 12.5 28.5 49.1 25.7 38.9 53.2 81.9 91.4
Head (calc.) 3932 100.0 0.31 0.44 0.43 0.48 0.05 2.68 12.7 22.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 0.41 0.45 0.04 2.53 11.9 22.8
Bulk 3rd Clnr Conc 32.1 0.82 23.2 3.65 2.51 12.0 1.41 29.2 30.2 2.3 60.4 6.83 4.73 20.3 25.2 8.9 1.9 0.08
Bulk 2nd Clnr Conc 48.3 1.23 17.0 6.12 2.74 12.47 1.10 26.0 28.4 4.9 66.7 17.2 7.77 31.7 29.6 11.9 2.8 0.27
Bulk 1st Clnr Conc 144 3.67 6.76 6.36 2.52 7.59 0.51 17.2 23.9 12.1 79.1 53.5 21.3 57.7 40.9 23.5 6.9 1.98
Bulk Rougher Conc 213 5.42 4.60 4.44 1.96 5.25 0.36 12.5 19.7 16.1 79.6 55.2 24.5 58.9 42.4 25.3 8.4 3.87
Ni 2nd Clnr Conc 16.0 0.41 3.11 7.05 9.33 7.69 1.12 29.6 42.3 3.7 4.0 6.6 8.75 6.48 9.99 4.49 1.36 0.07
Ni 2nd Clnr + Scav. Conc 29.8 0.76 1.87 4.80 6.77 4.99 0.69 26.9 40.0 5.8 4.5 8.3 11.8 7.83 11.5 7.60 2.39 0.20
Ni 1st Clnr Conc 65.6 1.67 1.01 2.97 4.24 2.86 0.39 21.3 35.2 9.4 5.4 11.3 16.3 9.89 14.1 13.3 4.63 0.70
Ni Scav Conc 230 5.85 0.42 1.22 1.95 1.27 0.15 9.86 21.0 18.4 7.9 16.3 26.4 15.3 18.7 21.5 9.7 4.78
Bulk Rghr+Scav Conc 443 11.3 2.44 2.77 1.96 3.18 0.25 11.1 20.4 17.3 87.5 71.5 50.9 74.3 61.1 46.8 18.1 8.65
Metallurgical Balance
Product
Weight Assays, %
% Distribution
g % Cu Ni S other Cp Pn Po Ga Cu Ni S Cp Pn Po Ga
Bulk 3rd Clnr Conc 32.1 0.82 23.2 3.65 29.2 44.0 67.1 10.6 5.78 16.6 60.4 6.8 8.9 40.1 3.7 0.3 0.2
Bulk 3rd Clnr Tail 16.2 0.41 4.80 11.0 19.6 64.6 13.9 32.1 10.8 43.3 6.3 10.4 3.0 4.2 5.7 0.3 0.2
Bulk 2nd Clnr Tail 96.0 2.44 1.59 6.5 12.8 79.1 4.60 18.7 13.0 63.7 12.4 36.3 11.6 8.2 19.7 2.3 1.9
Bulk 1st Clnr Tail 69.0 1.75 0.10 0.43 2.65 96.8 4.60 18.7 13.0 63.7 0.6 1.7 1.7 5.9 14.1 1.7 1.4
Ni 2nd Clnr Conc 16.0 0.41 3.11 7.05 29.6 60.2 0.29 1.03 5.73 93.0 4.0 6.6 4.5 0.1 0.2 0.2 0.5
Ni 2nd Clnr Scav.Conc 13.8 0.35 0.44 2.19 23.8 73.6 8.99 19.8 51.6 19.6 0.5 1.8 3.1 2.3 3.0 1.3 0.1
Ni 2nd Clnr Scav. Tail 35.8 0.91 0.29 1.44 16.7 81.6 1.27 5.40 55.9 37.4 0.8 3.0 5.7 0.8 2.1 3.7 0.4
Ni 1st Clnr Tail 164.3 4.18 0.19 0.52 5.27 94.0 0.84 3.45 39.6 56.2 2.5 5.0 8.2 2.6 6.2 12.0 2.8
Ni Scav Tail 3489 88.7 0.04 0.14 1.61 98.2 0.55 1.19 12.1 86.1 12.5 28.5 53.2 35.7 45.3 78.2 92.6
Head (calc.) 3932 100.0 0.31 0.44 2.68 96.6 1.36 2.33 13.8 82.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 3rd Clnr Conc 32.1 0.82 23.2 3.65 29.2 44.0 67.1 10.6 5.78 16.6 60.4 6.8 8.9 40.1 3.7 0.3 0.2
Bulk 2nd Clnr Conc 48.3 1.23 17.0 6.12 26.0 50.9 49.2 17.8 7.45 25.5 66.7 17.2 11.9 44.3 9.4 0.7 0.4
Bulk 1st Clnr Conc 144.3 3.67 6.76 6.36 17.2 69.7 19.5 18.4 11.1 50.9 79.1 53.5 23.5 52.5 29.1 3.0 2.3
Bulk Rougher Conc 213 5.42 4.60 4.44 12.5 78.5 14.7 18.5 11.7 55.0 79.6 55.2 25.3 58.5 43.2 4.6 3.6
Ni 2nd Clnr Conc 16.0 0.41 3.11 7.05 29.6 60.2 0.29 1.03 5.73 93.0 4.0 6.6 4.5 0.1 0.2 0.2 0.5
Ni 2nd Clnr + Scav. Conc 29.8 0.76 1.87 4.80 26.9 66.4 4.32 9.72 27.0 59.0 4.5 8.3 7.6 2.4 3.2 1.5 0.5
Ni 1st Clnr Conc 65.6 1.67 1.01 2.97 21.3 74.7 2.66 7.36 42.8 47.2 5.4 11.3 13.3 3.2 5.3 5.2 1.0
Ni Scav Conc 230 5.85 0.42 1.22 9.86 88.5 1.36 4.57 40.5 53.6 7.9 16.3 21.5 5.8 11.5 17.2 3.8
Bulk Rghr+Scav Conc 443 11.27 2.44 2.77 11.1 83.7 7.78 11.3 26.6 54.3 87.5 71.5 46.8 64.3 54.7 21.8 7.4