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

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Test No.: F15 <strong>Project</strong> No.: 50149-001 Operator: YW Date: 08-Nov-11<br />

Purpose: Cleaner flotation test, Repeat F13 adjust CMC and Guar gum dosages<br />

Procedure: As outlined below.<br />

Feed: 2 kg of minus 10 mesh of Master Composite<br />

Grind: 57 minutes / 2 kg @ 65% solids in laboratory Ball Mill<br />

Regrind:<br />

Target K 80 :90 µm<br />

Conditions:<br />

Reagents added, g/t Time, minutes<br />

Stage Lime SIPX MIBC* CMC DF250 PAX Guar Gum Grind Cond. Froth pH Eh<br />

Grind 5 57<br />

Condition 1<br />

Rougher 1 10 1 2 8.3 33.8<br />

Rougher 2 5 5 1 2 8.5 7.9<br />

Rougher 3 10 5 1 4 8.5 -2.1<br />

Rougher 4 20 5 1 6 8.6 -18.5<br />

Regrind (PM) 0<br />

1st Cleaner 5 50 75 1 8 8.7 4.0<br />

1st Cleaner Scav 10 5 1 4 8.8 0.3<br />

2nd Cleaner 10 20 30 1 6 8.9 -22.4<br />

3rd Cleaner 10 5 7.5 1 4 8.7 49.3<br />

Total 0 55 50 75 113 57 9<br />

* As required<br />

36 . .<br />

Stage<br />

Roughers 1stClnr and Scav. 2nd, 3rd Cleaner<br />

Flotation Cell 1000g-D12 500-g D12<br />

250-g D12<br />

Speed: rpm 1800<br />

1600<br />

1100<br />

Assay for: Cu, Ni,S, Pt, Pd, Au<br />

MgO assay for 3rd Clnr Conc.<br />

Metallurgical Balance<br />

Product<br />

Weight<br />

g % Cu<br />

Assays, (Pt, Pd, Au g/t), (Cu, Ni %)<br />

Ni S Pt Pd Au Cu Ni<br />

% Distribution<br />

S Pt Pd Au<br />

3rd Clnr Conc 31.6 1.6 15.4 3.68 23.3 3.29 11.4 0.89 76.9 13.6 16.2 12.9 37.9 31.7<br />

3rd Clnr Tls 29.2 1.5 1.38 8.31 15.1 3.00 6.04 0.60 6.4 28.5 9.7 10.9 18.6 19.8<br />

2nd Clnr Tls 81.5 4.1 0.28 2.64 8.89 1.86 2.05 0.07 3.6 25.3 16.0 18.8 17.6 6.4<br />

1st Clnr Scv Conc 60.1 3.0 0.13 0.54 6.73 0.94 0.51 0.03 1.2 3.8 8.9 7.0 3.2 2.0<br />

1st Clnr Scv Tls 143 7.2 0.07 0.23 2.70 0.56 0.25 0.02 1.6 3.9 8.5 9.9 3.8 3.2<br />

Rougher Tails 1635 82.5 0.04 0.13 1.13 0.20 0.11 < 0.02 10.3 24.9 40.7 40.5 18.9 36.9<br />

Head (calc.) 1980 100 0.32 0.43 2.29 0.41 0.48 0.04 100 100 100 100 100 100<br />

(direct) 0.33 0.42 2.53 0.41 0.45 0.04<br />

Combined Products<br />

Product<br />

Weight<br />

g % Cu<br />

Assays, (Pt, Pd, Au g/t), (Cu, Ni %)<br />

Ni S Pt Pd Au Cu Ni<br />

% Distribution<br />

S Pt Pd Au<br />

3rd Clnr Conc 31.6 1.60 15.4 3.68 23.3 3.29 11.4 0.89 76.9 13.6 16.2 12.9 37.9 31.7<br />

2nd Clnr Conc 60.8 3.07 8.67 5.90 19.4 3.15 8.83 0.75 83.2 42.1 25.9 23.7 56.5 51.5<br />

1st Clnr Conc 142.3 7.19 3.86 4.03 13.4 2.41 4.95 0.36 86.8 67.4 41.9 42.5 74.1 57.9<br />

1st Cl & ClScv Conc 202.4 10.2 2.75 3.00 11.4 1.97 3.63 0.26 88.1 71.2 50.8 49.5 77.3 59.9<br />

Rghr Conc 345.7 17.5 1.64 1.85 7.79 1.39 2.23 0.16 89.7 75.1 59.3 59.5 81.1 63.1<br />

Cleaner Circuit Mass rec Upgrade Unit Recovery<br />

Unit Performance 9% 9.38 1.99 2.99 2.37 5.12 5.49 88% 23% 42% 38% 51% 55%<br />

Product Weight<br />

Assays, % % Distribution<br />

g % Cp Pn Po Gangue Cp Pn Po Gangue<br />

3rd Cleaner Conc 44.7 2.3 44.6 10.4 11.2 33.8 79.5 15.6 6.1 0.8<br />

3rd Cleaner Tail 56.8 2.9 4.00 23.6 15.6 56.8 9.1 45.0 10.8 1.7<br />

2nd Cleaner Tail 64.2 3.2 0.81 7.36 16.3 75.6 2.1 15.9 12.7 2.6<br />

1st Cleaner Scav Conc 30.6 1.5 0.38 1.36 16.2 82.1 0.5 1.4 6.0 1.4<br />

1st Cleaner Scav Tail 179.1 9.0 0.21 0.58 6.4 92.8 1.5 3.5 14.0 9.0<br />

Rougher Tail 1610 81.1 0.12 0.34 2.57 97.0 7.4 18.5 50.4 84.5<br />

Head (calc.) 1985.0 100 1.26 1.50 4.1 93.1 100 100 100 100<br />

Combined Products Cu+Ni PGE<br />

3rd Cleaner Conc 2.3 44.6 10.4 11.2 33.8 79.5 15.6 6.1 0.8 19.1 15.6<br />

2nd Cleaner Conc 5.1 21.9 17.8 13.6 46.7 88.6 60.7 16.9 2.6 14.6 12.7<br />

1st Cleaner Conc 8.3 13.7 13.7 14.7 57.9 90.6 76.6 29.6 5.2 7.9 7.7<br />

1st Cl + Sc Conc 9.9 11.6 11.8 14.9 61.7 91.1 78.0 35.6 6.5 5.8 5.9<br />

Rougher Conc 18.9 6.19 6.45 10.8 76.5 92.6 81.5 49.6 15.5 3.5 3.8<br />

Rougher Tail' 81.1 0.12 0.34 2.57 97.0 7.4 18.5 50.4 84.5

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