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

Test: F39-MF2 Project: 50149-001 11603-005
Date: 15-Mar-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: 18 minutes/2 kg at 65% solids in a lab mill Target ~ 300 micron
Sec Grind: 36 minutes/2 kg at ~65% solids in a lab mill Target 90 micron
Regrind 8 min in Pebble Mill Prim Clnrs K80 : 102 µm
Sec Clnrs K 80 : 100 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 18
Prim Rougher 10 10 1 2 8.5
Prim Rougher 20 5 2 8.4
Prim 1st Cleaner 10 10 5 1 1 8.1
Prim 1st Cleaner 5 2 1
Prim 1st Cleaner Scavenger 1 4037: 15 g/t 1
Prim 1st Cleaner Scavenger 2 20 1
Prim 2nd Cleaner 5 5 5 1 1 7.6 320.8
Prim 2nd Cleaner 5 3 1
Prim Ro Tail to Sec Grind
Sec Grind 36
Sec Scav 1 30 10 4 8.7 21.9
Sec Scav 2 30 5 4 8.7 -24.9
Sec Scav 3 30 5 4 8.7 27.2
Combine Scav Conc 1-3
Sec 1st Cleaner 15 15 5 1 2 8.7 20.7
5 2
5 2
Sec 2nd Cleaner 5 10 1 2 8.3 64.9
10 2
Sec 1st Cl Tail to Regrind
Regrind 8
Regrind Scav 20 2.5 2.5 2
Total 0 170 0 30 35 65 54 5
*As needed
32 430.6
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
Assay only Cu, Ni, S PSA on Regrind
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S Cu Ni S
Prim Clnr 2 Conc 18.9 0.96 15.5 7.28 29.7 40.9 14.9 8.6
Prim Clnr 2 Tail 7.6 0.39 1.96 9.61 24.0 2.1 7.9 2.8
Prim Clnr 1 Scav Tail 12.0 0.61 1.98 8.66 23.6 3.3 11.2 4.3
Prim 1st Clnr Scav 1Conc 9.2 0.47 0.97 6.36 20.9 1.2 6.3 2.9
Prim 1st Clnr Scav 2 Conc 46.3 2.35 0.25 1.20 6.35 1.6 6.0 4.5
Sec Clnr 2 Conc 50.8 2.58 5.31 4.20 20.7 37.6 23.1 16.1
Sec Clnr 2 Tail 38.8 1.97 0.41 1.01 10.8 2.2 4.2 6.4
Regrind Scav Conc 4.2 0.21 0.65 0.98 7.80 0.4 0.4 0.5
Regrind Scav Tail 101.2 5.14 0.09 0.37 6.50 1.3 4.1 10.0
Sec Scav Tail 1682 85.3 0.04 0.12 1.71 9.4 21.8 43.9
Head (calc.) 1971 100.0 0.36 0.47 3.32 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Prim Clnr 2 Conc 18.9 1.0 15.5 7.28 29.7 40.9 14.9 8.6
Prim Clnr 1 Conc 26.5 1.3 11.6 7.95 28.1 42.9 22.8 11.4
Prim Rougher Conc 94.0 4.8 3.75 4.56 16.1 49.1 46.4 23.1
Sec Clnr 2 Conc 50.8 2.6 5.31 4.20 20.7 37.6 23.1 16.1
Sec Clnr 1 Conc 89.6 4.5 3.19 2.82 16.4 39.8 27.3 22.5
Sec Scav Conc 195.0 9.9 1.53 1.51 11.1 41.5 31.8 33.0
Regrind Scav Conc 4.2 0.2 0.65 0.98 7.80 0.4 0.4 0.5
Regrind Scav Feed 105.4 5.3 0.11 0.39 6.55 1.7 4.5 10.5
Comb Clnr Conc 69.7 3.5 8.07 5.04 23.1 78.5 38.0 24.6
Comb Ro & Scav Conc 289.0 14.7 2.25 2.50 12.7 90.6 78.2 56.1
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S other Cp Pn Po Ga Cu Ni S Cp Pn Po Ga
Prim Clnr 2 Conc 18.9 0.96 15.5 7.28 29.7 47.5 44.8 21.1 18.3 15.8 40.9 14.9 8.6 35.2 9.96 1.0 0.2
Prim Clnr 2 Tail 7.60 0.39 1.96 9.61 24.0 64.4 5.66 27.6 33.4 33.3 2.1 7.9 2.8 1.8 5.3 0.8 0.2
Prim Clnr 1 Scav Tail 12.0 0.61 1.98 8.66 23.6 65.8 5.72 24.8 34.7 34.7 3.3 11.2 4.3 2.9 7.5 1.2 0.3
Prim 1st Clnr Scav 1Conc 9.20 0.47 0.97 6.36 20.9 71.8 5.72 24.8 34.7 34.7 1.2 6.3 2.9 2.2 5.7 1.0 0.2
Prim 1st Clnr Scav 2 Conc 46.3 2.35 0.25 1.20 6.35 92.2 2.80 18.0 36.2 43.0 1.6 6.0 4.5 5.4 20.9 5.0 1.3
Sec Clnr 2 Conc 50.8 2.58 5.31 4.20 20.7 69.8 0.72 3.18 13.1 83.0 37.6 23.1 16.1 1.5 4.0 2.0 2.7
Sec Clnr 2 Tail 38.8 1.97 0.41 1.01 10.8 87.8 15.3 11.8 29.7 43.2 2.2 4.2 6.4 24.8 11.4 3.4 1.1
Regrind Scav Conc 4.20 0.21 0.65 0.98 7.80 90.6 1.18 2.43 24.8 71.6 0.4 0.4 0.5 0.2 0.3 0.3 0.2
Regrind Scav Tail 101 5.14 0.09 0.37 6.50 93.0 1.88 2.48 16.4 79.3 1.3 4.1 10.0 7.9 6.3 4.9 5.1
Sec Scav Tail 1682 85.3 0.04 0.12 1.71 98.1 0.26 0.68 16.0 83.0 9.4 21.8 43.9 18.2 28.8 80.3 88.9
Head (calc.) 1971 100.0 0.36 0.47 3.32 95.8 1.22 2.03 17.0 79.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Prim Clnr 2 Conc 18.9 0.96 15.5 7.28 29.7 47.5 44.8 21.1 18.3 15.8 40.9 14.9 8.6 35.2 10.0 1.0 0.2
Prim Clnr 1 Conc 26.5 1.34 11.6 7.95 28.1 52.4 33.6 22.9 22.6 20.8 42.9 22.8 11.4 37.0 15.2 1.8 0.4
Prim Rougher Conc 94.0 4.77 3.75 4.56 16.1 75.6 12.1 20.9 32.1 34.9 47.5 40.4 18.6 42.0 28.4 4.0 0.8
Sec Clnr 2 Conc 50.8 2.58 5.31 4.20 20.7 69.8 0.7 3.2 13.1 83.0 1.6 6.0 4.5 5.4 20.9 5.0 1.3
Sec Clnr 1 Conc 89.6 4.55 3.19 2.82 16.4 77.6 7.06 6.9 20.3 65.8 39.2 29.1 20.5 6.9 24.9 7.0 4.0
Sec Scav Conc 195 9.90 1.53 1.51 11.1 85.9 4.24 4.5 18.3 72.9 41.5 33.3 26.9 31.7 36.3 10.4 5.0
Regrind Scav Conc 4.20 0.21 0.65 0.98 7.80 90.6 1.18 2.43 24.8 71.6 43.1 37.8 37.5 39.8 42.9 15.7 10.3
Regrind Scav Feed 105 5.35 0.11 0.39 6.55 92.9 1.85 2.47 16.7 79.0 0.4 0.4 0.5 0.2 0.3 0.3 0.2
Comb Clnr Conc 69.7 3.54 8.07 5.04 23.14 63.8 12.7 8.03 14.50 64.8 1.7 4.5 10.5 8.1 6.5 5.3 5.3
Comb Ro & Scav Conc 289 14.7 2.25 2.50 12.71 82.5 6.81 9.85 22.81 60.5 11.0 26.3 54.4 26.3 35.3 85.6 94.2