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

Test No.: F16 Project No.: 50149-001 Operator: YW Date: Nov 15 2011
Purpose: Cleaner flotation test, Repeat F15 adjust CMC and Guar gum dosages
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 Guar Gum Grind Cond. Froth pH Eh
Grind 5 57
Condition 1
Rougher 1 10 1 2 8.9 41.4
Rougher 2 5 5 1 2 8.4 41.3
Rougher 3 10 5 1 4 8.4 33.4
Rougher 4 20 5 1 6 8.2 27.1
Regrind (PM) 0
1st Cleaner 5 50 75 1 8 8.9 40.3
1st Cleaner Scav 10 5 1 4 8.8 -24.3
2nd Cleaner 10 10 7.5 1 6 9.2 57.5
3rd Cleaner 10 5 2.5 1 4 8.8 56.1
Total 0 55 50 65 85 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
target mass pull including paper 73 gr Actual 81 gr MgO assay for 3rd Clnr Conc.
Metallurgical Balance
Product
Weight
g % Cu
Assays, (Pt, Pd, Au g/t), (Cu, Ni %)
Ni S Pt Pd Au Cu Ni
% Distribution
S Pt Pd Au
3rd Clnr Conc 48.1 2.4 11.9 6.58 24.0 2.69 8.55 0.85 79.7 33.0 18.3 15.0 45.1 43.4
3rd Clnr Tls 36.9 1.9 1.22 6.17 14.4 2.31 3.45 0.19 6.3 23.7 8.4 9.9 14.0 7.4
2nd Clnr Tls 74.1 3.7 0.33 1.81 9.23 1.76 1.60 0.10 3.4 14.0 10.9 15.2 13.0 7.9
1st Clnr Scv Conc 61.9 3.1 0.15 0.72 12.2 1.31 0.72 0.06 1.3 4.6 12.0 9.4 4.9 3.9
1st Clnr Scv Tls 189 9.5 0.06 0.26 3.58 0.47 0.20 0.02 1.7 5.1 10.7 10.3 4.1 4.0
Rougher Tails 1570 79.3 0.04 0.12 1.59 0.22 0.11 0.02 7.7 19.6 39.6 40.2 18.9 33.3
Head (calc.) 1980 100 0.36 0.49 3.18 0.43 0.46 0.05 100 100 100 100 100 100
(direct) 0.33 0.42 2.53 0.41 0.45 0.04
Combined Products
Product
Weight
g % Cu
Assays, (Pt, Pd, Au g/t), (Cu, Ni %)
Ni S Pt Pd Au Cu Ni
% Distribution
S Pt Pd Au
3rd Clnr Conc 48.1 2.4 11.9 6.58 24.0 2.69 8.55 0.85 79.7 33.0 18.3 15.0 45.1 43.4
2nd Clnr Conc 85.0 4.3 7.26 6.40 19.8 2.53 6.34 0.56 86.0 56.7 26.8 24.9 59.0 50.8
1st Clnr Conc 159 8.0 4.03 4.26 14.9 2.17 4.13 0.35 89.4 70.6 37.6 40.1 72.0 58.7
1st Cl & ClScv Conc 221 11.2 2.95 3.27 14.1 1.93 3.18 0.27 90.7 75.3 49.6 49.5 76.9 62.7
Rghr Conc 410 20.7 1.62 1.88 9.28 1.26 1.80 0.15 92.3 80.4 60.4 59.8 81.1 66.7
Cleaner Circuit Mass rec Upgrade Unit Recovery
Unit Performance 12% 7.35 3.49 2.59 2.14 4.74 5.55 88% 47% 48% 42% 61% 71%
Product Weight
Assays, % % Distribution
g % Cp Pn Po Gangue Cp Pn Po Gangue
3rd Cleaner Conc 48.1 2.4 34.5 18.6 15.2 31.7 79.7 34.4 5.9 0.8
3rd Cleaner Tail 36.9 1.9 3.54 17.4 19.5 59.5 6.3 24.7 5.8 1.2
2nd Cleaner Tail 74.1 3.7 0.96 4.95 19.1 75.0 3.4 14.1 11.4 3.1
1st Cleaner Scav Conc 61.9 3.1 0.43 1.71 30.2 67.6 1.3 4.1 15.1 2.3
1st Cleaner Scav Tail 188.7 9.5 0.18 0.64 8.7 90.5 1.7 4.7 13.2 9.4
Rougher Tail 1570 79.3 0.10 0.30 3.83 95.8 7.7 18.0 48.5 83.1
Head (calc.) 1979.9 100 1.05 1.31 6.3 91.4 100 100 100 100
Combined Products Cu+Ni PGE
3rd Cleaner Conc 2.4 34.5 18.6 15.2 31.7 79.7 34.4 5.9 0.8 18.5 12.1
2nd Cleaner Conc 4.3 21.1 18.1 17.1 43.8 86.0 59.1 11.7 2.1 13.7 9.4
1st Cleaner Conc 8.0 11.69 12.0 18.0 58.3 89.4 73.2 23.1 5.1 8.3 6.6
1st Cl + Sc Conc 11.2 8.54 9.10 21.4 60.9 90.7 77.3 38.2 7.4 6.2 5.4
Rougher Conc 20.7 4.69 5.21 15.6 74.5 92.3 82.0 51.5 16.9 3.5 3.2
Rougher Tail' 79.3 0.10 0.30 3.83 95.8 7.7 18.0 48.5 83.1