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

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Test No.: F12 <strong>Project</strong> No.: 50149-001 Operator: YW Date: 01-Nov-11<br />

Purpose: Cleaner flotation test, Repeat F10 with higher CMC in the clnrs<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<br />

Time, minutes<br />

Stage Lime SIPX MIBC* CMC DF250 PAX 3477 Grind Cond. Froth pH Eh<br />

Grind<br />

Condition<br />

5 57<br />

Rougher 1 10 1 2 8.9 25.3<br />

Rougher 2 5 5 1 2 8.8 -9.1<br />

Rougher 3 10 5 1 4 8.8 -9.5<br />

Rougher 4 20 5 1 6 8.8 -27.8<br />

Regrind (PM) 0<br />

1st Cleaner 5 75 1 8 8.8 19.3<br />

1st Cleaner Scav 10 1 4 8.5 -9.2<br />

2nd Cleaner 5 75 1 6 8.7 29.0<br />

3rd Cleaner 5 50 1 4 8.6 39.2<br />

Total 0 55 35 200 0 57 8<br />

* As required<br />

36 . .<br />

Stage<br />

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

Flotation Cell<br />

1000g-D12 500-g D12 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 %<br />

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

Cu Ni S Pt Pd Au Cu<br />

% Distribution<br />

Ni S Pt Pd Au<br />

3rd Clnr Conc 61.5 3.1 10.2 8.02 26.2 3.62 9.14 0.99 79.2 48.5 23.0 22.1 52.8 52.7<br />

3rd Clnr Tls 102.2 5.1 0.76 2.46 14.3 2.36 2.13 0.14 9.8 24.7 20.8 23.9 20.4 12.4<br />

2nd Clnr Tls 143.1 7.2 0.19 0.50 5.92 0.93 0.57 0.04 3.4 7.0 12.1 13 7.7 5.0<br />

1st Clnr Scv Conc 33.9 1.7 0.12 0.39 7.57 0.93 0.44 0.04 0.5 1.3 3.7 3.1 1.4 1.2<br />

1st Clnr Scv Tls 112.4 5.6 0.04 0.16 2.54 0.34 0.16 0.02 0.6 1.8 4.1 3.8 1.7 1.9<br />

Rougher Tails 1548 77.4 0.03 0.11 1.65 0.22 0.11 0.02 6.4 16.7 36.4 33.8 16.0 26.8<br />

Ni(S)= 0.07<br />

Head (calc.) 2001 100 0.40 0.51 3.51 0.50 0.53 0.06 100 100 100 100 100 100<br />

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

1st Clnr Scv Tls Ni(S)=0.12<br />

Combined Products<br />

Product<br />

Weight<br />

g %<br />

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

Cu Ni S Pt Pd Au Cu<br />

% Distribution<br />

Ni S Pt Pd Au<br />

3rd Clnr Conc 61.5 3.07 10.2 8.02 26.2 3.62 9.1 0.99 79.2 48.5 23.0 22.1 52.8 52.7<br />

2nd Clnr Conc 164 8.18 4.31 4.55 18.8 2.83 4.76 0.46 89.0 73.2 43.8 46.1 73.3 65.1<br />

1st Clnr Conc 307 15.3 2.39 2.66 12.8 1.95 2.81 0.26 92.4 80.2 55.9 59.3 80.9 70.1<br />

1st Cl & ClScv Conc 341 17.0 2.16 2.43 12.3 1.84 2.57 0.24 92.9 81.5 59.5 62.4 82.3 71.2<br />

Rghr Conc 453 22.6 1.64 1.87 9.85 1.47 1.97 0.19 93.6 83.3 63.6 66.2 84.0 73.2<br />

Cleaner Circuit Mass rec<br />

Upgrade<br />

Unit Recovery<br />

Unit Performance 14% 6.24 4.29 2.66 2.46 4.63 5.31 85% 60% 43% 39% 65% 75%<br />

Product Weight<br />

Assays, % % Distribution<br />

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

3rd Cleaner Conc 61.5 3.1 29.6 22.7 22.0 25.7 79.2 50.7 9.7 0.9<br />

3rd Cleaner Tail 102.2 5.1 2.20 6.69 29.8 61.3 9.8 24.9 21.8 3.5<br />

2nd Cleaner Tail 143.1 7.2 0.55 1.27 14.0 84.2 3.4 6.6 14.3 6.7<br />

1st Cleaner Scav Conc 33.9 1.7 0.35 0.90 18.8 79.9 0.5 1.1 4.6 1.5<br />

1st Cleaner Scav Tail 112.4 5.6 0.13 0.39 6.2 93.3 0.6 1.6 5.0 5.8<br />

Rougher Tail 1548 77.4 0.10 0.27 4.0 95.6 6.4 15.1 44.6 81.7<br />

Head (calc.) 2001 100 1.15 1.37 7.0 90.5 100 100 100 100<br />

Combined Products Cu+Ni PGE<br />

3rd Cleaner Conc 3.1 29.6 22.7 22.0 25.7 79.2 50.7 9.7 0.9 18.2 13.8<br />

2nd Cleaner Conc 8.2 12.5 12.7 26.9 47.9 89.0 75.6 31.5 4.3 8.9 8.1<br />

1st Cleaner Conc 15.3 6.92 7.36 20.9 64.9 92.4 82.2 45.8 11.0 5.0 5.0<br />

1st Cl + Sc Conc 17.0 6.26 6.72 20.7 66.4 92.9 83.3 50.4 12.5 4.6 4.7<br />

Rougher Conc 22.6 4.74 5.15 17.1 73.0 93.6 84.9 55.4 18.3 3.5 3.6<br />

Rougher Tail' 77.4 0.10 0.27 4.02 95.6 6.4 15.1 44.6 81.7

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