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

Test: F33-MF2 Project: 50149-001 11603-005
Date: 10-Feb-12 Operator: YW
Purpose: Test MF2 flowsheet as recommended by Wardrop in Draft PEA
Procedure: As below, adapted by Mike Ounpuu
Feed: 2 kg of -10 mesh Master Composite
Prim Grind: 19 minutes/2 kg at 65% solids in a lab mill Target ~ 300 micron
Sec Grind: 38 minutes/2 kg at ~65% solids in a lab mill Target 90 micron
Regrind 8 min in Pebble Mill Prim Clnrs K80 : 52 µm
Sec Clnrs K 80 : 71 µm
Conditions: Scav. Reg. K 80 : 30 µm
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX 4037 CMC Guar MIBC* Grind Cond. Froth pH Eh
Prim Grind 19
Prim Rougher 10 40 10 1 2 8.6 165.0
Prim 1st Cleaner 10 5 1 1.5 8.4 91.4
Prim 2nd Cleaner 5 6 1 1 7.8 143.3
Prim Ro Tail to Sec Grind
Sec Grind 38
Sec Scav 1 30 40 6 6 8.8 109.2
Sec Scav 2 30 40 6 8.8 40.7
Combine Scav Conc 1-2
Sec 1st Cleaner 0+2 30 5 2 2+2 8.8 62.9
Sec 2nd Cleaner 10 15 2 4 8.5 114.3
Sec 3rd Cleaner 5 2 3 8.1 130.7
Sec 1st Cl Tail to Regrind
Regrind 4
Regrind Scav 10 10 2 8.6 84.0
Total 0 70 0 160 20 47 57 9
*As needed
23.5
Stage Rougher 1st cleaners 2nd & 3rd clnr & sep PSA on Sec Scav tail
Flotation Cell 1000 g D-12 500 g D-12 250 g D-12 PSA on Pri Clnr
Speed: r.p.m. 1800 1600 1200 PSA on Sec Clnr
PSA on 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
Prim Cl 2 Conc 7.9 0.40 22.4 2.64 2.47 10.1 1.60 29.2 31.8 2.89 29.4 2.4 2.3 8.0 13.7 4.8 1.0 0.0
Prim Cl 2 Tail 11.9 0.61 3.54 13.2 2.63 11.2 0.44 23.9 30.3 5.58 7.0 18.2 3.6 13.4 5.7 5.9 1.4 0.1
Prim Cl 1 Tail 33.9 1.73 0.38 2.10 0.75 1.20 0.06 4.60 12.6 18.0 2.1 8.2 3.0 4.1 2.2 3.2 1.7 1.3
Sec Cl 3 Conc 29.7 1.51 7.53 6.61 3.82 9.44 0.72 23.7 29.9 4.75 37.2 22.7 13.2 28.1 23.2 14.5 3.6 0.3
Sec Cl 3 Tail 52.3 2.66 0.88 2.40 3.43 3.24 0.19 8.95 19.1 19.5 7.7 14.5 20.9 17.0 10.8 9.7 4.0 2.2
Sec Cl 3 Tail 11.2 0.57 0.40 1.51 2.03 1.47 0.09 8.37 18.8 20.7 0.7 2.0 2.6 1.6 1.1 1.9 0.8 0.5
Regrind Scav Conc 4.6 0.23 0.70 1.23 2.92 2.03 0.37 6.88 15.9 20.5 0.5 0.7 1.6 0.9 1.8 0.7 0.3 0.2
Regrind Scav Tail 91.9 4.68 0.08 0.32 0.63 0.30 0.04 3.44 13.1 21.8 1.2 3.4 6.7 2.8 4.0 6.5 4.8 4.3
Sec Scav Tail 1722 87.6 0.05 0.14 0.23 0.14 0.02 1.49 11.9 24.8 14.0 27.9 46.1 24.2 37.4 52.9 82.3 91.1
Head (calc.) 1965 100.0 0.31 0.44 0.44 0.51 0.05 2.47 12.7 23.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 0.41 0.45 0.04 2.53 11.9 22.8
Prim 2nd Clnr Conc 7.9 0.4 22.4 2.64 2.47 10.1 1.60 29.2 31.8 2.9 29.4 2.4 2.3 8.0 13.7 4.8 1.0 0.0
Prim 1st Clnr Conc 19.8 1.0 11.1 8.99 2.57 10.8 0.90 26.0 30.9 4.5 36.5 20.6 5.9 21.4 19.4 10.6 2.5 0.2
Prim Rougher Conc 53.7 2.7 4.32 4.64 1.42 4.73 0.37 12.5 19.3 13.0 38.6 28.8 8.9 25.4 21.6 13.8 4.2 1.5
Sec 3rd Clnr Conc 29.7 1.5 7.53 6.61 3.82 9.44 0.72 23.7 29.9 4.75 37.2 22.7 13.2 28.1 23.2 14.5 3.6 0.3
Sec 2nd Clnr Conc 82.0 4.2 3.29 3.92 3.57 5.49 0.38 14.3 23.0 14.2 44.9 37.3 34.1 45.1 34.0 24.2 7.6 2.5
Sec 1st Clnr Conc 93.2 4.7 2.94 3.63 3.39 5.00 0.35 13.6 22.5 14.9 45.6 39.2 36.7 46.7 35.1 26.1 8.4 3.0
Sec Scav Conc 190 9.7 1.50 1.97 2.04 2.65 0.20 8.51 17.8 18.4 47.4 43.3 45.0 50.4 41.0 33.3 13.6 7.4
Regrind Scav Conc 4.6 0.2 0.70 1.23 2.92 2.03 0.37 6.88 15.9 20.5 0.5 0.7 1.6 0.9 1.8 0.7 0.3 0.2
Regrind Scav Feed 96.5 4.9 0.11 0.36 0.74 0.38 0.06 3.60 13.2 21.7 1.7 4.1 8.3 3.7 5.8 7.2 5.1 4.5
Comb Clnr Conc 37.6 1.9 10.7 5.78 3.54 9.58 0.90 24.9 30.3 4.36 66.7 25.1 15.5 36.1 37.0 19.3 4.6 0.3
Comb Ro & Scav Conc 243 12.4 2.12 2.56 1.90 3.11 0.24 9.39 18.1 17.2 86.0 72.1 54 76 63 47.1 17.7 9
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S other Cp Pn Po Ga Cu Ni S Cp Pn Po Ga
Prim Cl 2 Conc 7.90 0.40 22.4 2.64 29.2 45.8 64.7 7.55 10.5 17.2 29.4 2.4 4.8 29.4 2.83 0.9 0.1
Prim Cl 2 Tail 11.9 0.61 3.54 13.2 23.9 59.4 10.2 38.4 19.8 31.6 7.0 18.2 5.9 7.0 21.7 2.6 0.2
Prim Cl 1 Tail 33.9 1.73 0.38 2.10 4.60 92.9 1.10 5.95 5.84 87.1 2.1 8.2 3.2 2.1 9.6 2.2 1.6
Sec Cl 3 Conc 29.7 1.51 7.53 6.61 23.7 62.2 21.8 18.9 25.5 33.8 37.2 22.7 14.5 37.2 26.7 8.2 0.5
Sec Cl 3 Tail 52.3 2.66 0.88 2.40 8.95 87.8 2.54 6.68 15.2 75.6 7.7 14.5 9.7 7.7 16.6 8.6 2.2
Sec Cl 3 Tail 11.2 0.57 0.40 1.51 8.37 89.7 1.16 4.02 17.2 77.6 0.7 2.0 1.9 0.7 2.1 2.1 0.5
Regrind Scav Conc 4.60 0.23 0.70 1.23 6.88 91.2 2.02 3.26 13.2 81.5 0.5 0.7 0.7 0.5 0.7 0.7 0.2
Regrind Scav Tail 91.9 4.68 0.08 0.32 3.44 96.2 0.23 0.66 8.14 91.0 1.2 3.4 6.5 1.2 2.9 8.1 4.6
Sec Scav Tail 1722 87.6 0.05 0.14 1.49 98.3 0.14 0.21 3.55 96.1 14.0 27.9 52.9 14.0 17.0 66.6 90.2
Head (calc.) 1965 100.0 0.31 0.44 2.47 96.8 0.88 1.07 4.67 93.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Prim 2nd Clnr Conc 7.90 0.4 22.4 2.64 29.2 45.8 64.7 7.55 10.5 17.2 29.4 2.4 4.8 29.4 2.8 0.9 0.1
Prim 1st Clnr Conc 19.8 1.0 11.1 8.99 26.0 53.9 32.0 26.1 16.1 25.8 36.5 20.6 10.6 36.5 24.5 3.5 0.3
Prim Rougher Conc 53.7 2.7 4.32 4.64 12.5 78.5 12.5 13.4 9.6 64.5 38.6 28.8 13.8 38.6 34.1 5.6 1.9
Sec 3rd Clnr Conc 29.7 1.5 7.53 6.61 23.7 62.2 21.8 18.9 25.5 33.8 37.2 22.7 14.5 37.2 26.7 8.2 0.5
Sec 2nd Clnr Conc 82.0 4.2 3.29 3.92 14.3 78.5 9.50 11.1 18.9 60.5 44.9 37.3 24.2 44.9 43.2 16.9 2.7
Sec 1st Clnr Conc 93.2 4.7 2.94 3.63 13.6 79.8 8.50 10.3 18.7 62.5 45.6 39.2 26.1 45.6 45.4 19.0 3.2
Sec Scav Conc 190 9.7 1.50 1.97 8.51 88.0 4.34 5.45 13.4 76.8 47.4 43.3 33.3 47.4 49.0 27.8 7.9
Regrind Scav Conc 4.60 0.2 0.70 1.23 6.88 91.2 2.02 3.26 13.2 81.5 0.5 0.7 0.7 0.5 0.7 0.7 0.2
Regrind Scav Feed 96.5 4.9 0.11 0.36 3.60 95.9 0.31 0.79 8.38 90.5 1.7 4.1 7.2 1.7 3.6 8.8 4.8
Comb Conc 37.6 1.9 10.7 5.78 24.9 58.7 30.8 16.5 22.3 30.3 66.7 25.1 19.3 66.7 29.5 9.1 0.6