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

Test No.: F17 Project No.: 50149-001 Operator: YW Date: Nov 22 2011
Purpose: Cleaner flotation test, Repeat F12 with lower CMC in the second and third clnrs
Procedure: As outlined below.
Feed: 2 kg of minus 10 mesh of Master Composite
Grind: 57 minutes / 2 kg @ 65% solids in laboratory Ball Mill
Regrind:
Target K 80 :90 µm
Conditions:
Reagents added, g/t
Time, minutes
Stage Lime SIPX MIBC* CMC DF250 PAX 3501 Grind Cond. Froth pH Eh
Grind 5 57
Condition 1
Rougher 1 10 1 2 8.9 11.0
Rougher 2 5 5 1 2 8.8 20.0
Rougher 3 10 5 1 4 8.8 -0.7
Rougher 4 20 5 1 6 8.9 -2.0
Regrind (PM) 0
1st Cleaner 5 75 1 8 8.9 25.5
1st Cleaner Scav 10 1 4 8.6 57.6
2nd Cleaner 5 35 1 6 8.8 54.3
3rd Cleaner 5 10 1 4 8.6 63.2
Total 0 55 35 120 0 57 9
* As required
36 . .
Stage
Roughers 1stClnr and Scav. 2nd, 3rd Cleaner
Flotation Cell 1000g-D12 500-g D12 250-g D12
Speed: rpm 1800
1600
1100
Assay for: Cu, Ni,S, Pt, Pd, Au
MgO assay for 3rd Clnr Conc.
Metallurgical Balance
Product
Weight
g % Cu
Assays, (Pt, Pd, Au g/t), (Cu, Ni, Fe, MgO %)
Ni S Pt Pd Au Fe MgO Cu Ni
% Distribution
S Pt Pd Au Fe MgO
3rd Clnr Conc 48.3 2.4 11.2 7.85 26.3 3.21 8.70 0.59 30.0 3.70 74.1 40.7 20.0 18.2 46.0 31.5 5.8 0.4
3rd Clnr Tls 47.5 2.4 1.46 4.24 15.8 2.70 3.32 0.27 24.6 12.1 9.5 21.6 11.8 15.1 17.3 14.2 4.7 1.4
2nd Clnr Tls 121 6.1 0.34 0.90 6.60 1.20 0.89 0.09 15.8 20.6 5.7 11.7 12.6 17.1 11.8 12.1 7.6 5.9
1st Clnr Scv Conc 38.3 1.9 0.17 0.54 11.4 1.13 0.63 0.06 23.4 17.2 0.9 2.2 6.9 5.1 2.6 2.5 3.6 1.6
1st Clnr Scv Tls 149 7.5 0.05 0.21 3.94 0.43 0.20 0.03 13.7 21.2 1.0 3.4 9.2 7.5 3.3 4.9 8.1 7.4
Rougher Tails 1575 79.6 0.04 0.12 1.60 0.20 0.11 < 0.02 11.2 22.5 8.8 20.3 39.6 37.0 19.0 34.8 70.3 83.4
Head (calc.) 1979 100 0.37 0.47 3.22 0.43 0.46 0.05 12.7 21.5 100 100 100 100 100 100 100 100
(direct) 0.33 0.42 2.53 0.41 0.45 0.04 11.9 22.8
Combined Products
Product
Weight
g % Cu
Assays, (Pt, Pd, Au g/t), (Cu, Ni, Fe, MgO %)
Ni S Pt Pd Au Fe MgO Cu Ni
% Distribution
S Pt Pd Au Fe MgO
3rd Clnr Conc 48.3 2.44 11.2 7.85 26.3 3.21 8.70 0.59 30.0 3.70 74.1 40.7 20.0 18.2 46.0 31.5 5.8 0.4
2nd Clnr Conc 95.8 4.84 6.37 6.06 21.1 2.96 6.03 0.43 27.3 7.86 83.6 62.4 31.8 33.3 63.3 45.7 10.4 1.8
1st Clnr Conc 217 11.0 3.00 3.18 13.0 1.98 3.16 0.24 20.9 15.0 89.2 74.1 44.3 50.4 75.1 57.7 18.1 7.7
1st Cl & ClScv Conc 256 12.9 2.58 2.78 12.8 1.85 2.78 0.21 21.3 15.3 90.1 76.3 51.2 55.5 77.8 60.3 21.6 9.2
Rghr Conc 404 20.4 1.65 1.84 9.51 1.33 1.83 0.15 18.5 17.5 91.2 79.7 60.4 63.0 81.0 65.2 29.7 16.6
Cleaner Circuit Mass rec Upgrade Unit Recovery
Unit Performance 12% 6.80 4.28 2.76 2.42 4.75 4.04 1.62 0.21 82% 55% 48% 41% 61% 56% 47% 47%
Product Weight
Assays, % % Distribution
g % Cp Pn Po Gangue Cp Pn Po Gangue
3rd Cleaner Conc 48.3 2.4 32.5 22.2 20.0 25.3 74.1 42.6 7.7 0.7
3rd Cleaner Tail 47.5 2.4 4.23 11.8 27.4 56.5 9.5 22.3 10.3 1.5
2nd Cleaner Tail 121.4 6.1 0.99 2.41 14.4 82.2 5.7 11.6 13.8 5.5
1st Cleaner Scav Conc 38.3 1.9 0.49 1.22 28.5 69.8 0.9 1.9 8.7 1.5
1st Cleaner Scav Tail 148.6 7.5 0.15 0.49 9.81 89.6 1.0 2.9 11.6 7.4
Rougher Tail 1575 79.6 0.12 0.30 3.84 95.7 8.8 18.7 48.0 83.5
Head (calc.) 1978.7 100 1.07 1.27 6.37 91.3 100 100 100 100
Combined Products Cu+Ni PGE
3rd Cleaner Conc 2.4 32.5 22.2 20.0 25.3 74.1 42.6 7.7 0.7 19.1 12.5
2nd Cleaner Conc 4.8 18.5 17.0 23.7 40.8 83.6 64.9 18.0 2.2 12.4 9.4
1st Cleaner Conc 11.0 8.70 8.86 18.5 64.0 89.2 76.5 31.8 7.7 6.2 5.4
1st Cl + Sc Conc 12.9 7.47 7.72 20.0 64.8 90.1 78.4 40.5 9.2 5.4 4.8
Rougher Conc 20.4 4.77 5.06 16.2 73.9 91.2 81.3 52.0 16.5 3.5 3.3
Rougher Tail' 79.6 0.12 0.30 3.84 95.7 8.8 18.7 48.0 83.5