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

Test: F29 Project: 11603-005 50149-001 Date: 08-Feb-12 Operator: YW
Purpose: Split flowsheet including Cu separation
Procedure: As below.
Feed: 2 kg of -10 mesh Master Composite
Grind: 57 minutes/2 kg at 65% solids in a lab mill
Regrind 2 minutes in the pebble mill (bulk clnr 1 concentrate)
Regrind 6 minutes in the pebble mill (Ni clnr 1 concentrate) Feed K80 :90 µm
Cu regrind K80: 31 µm
Conditions: Ni regrind K80: 26 µm
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX 4037 CMC MIBC* Grind Cond. Froth pH Eh
Grind 20 57
Bulk Rougher 1 10 1 2 8.7 124.6
Bulk Rougher 2 10 1 2 8.7 48.2
Ni Scav 1 30 6 8.7 85.3
Ni Scav 2 30 6 8.6 29.2
Combine Ro Conc 1-2
Bulk 1st Cleaner 0+5+2 20+20+0 5 2 3+2+1 8.7 101.2
Regrind (PM) 2
Bulk 2nd Cleaner 0+2 0+5 10 2 2+2 8.1 143.4
Bulk 3rd Cleaner 10 10 2 6 7.7 174.4
Condition 5
Cu Rougher 600 1 2 11.3 -2.9
Cu 1st Cleaner 95 1 1 11.0 16.9
Combine Scav Conc 1-2
Ni 1st Cleaner 10+5 50+20 2 3+3 8.6 98.7
Regrind (PM) 100 6
Ni 2nd Cleaner 5+2 10+10 5 2 2.5 10.0 49.9
Ni 3rd Cleaner 5 8 2 1.5 9.1 101.4
Ni 4th Cleaner 2 1 8.0 144.3
Total 795 90 0 15 0 48 65 21
*As needed
29
Stage Rougher 1st cleaners 2nd & 3rd clnr & sep
Flotation Cell 1000 g D-12 500 g D-12 250 g D-12 PSA On Bulk Regrind
Speed: r.p.m.
Metallurgical Balance
1800 1600 1200 PSA On Ni Regrind
Assay for Cu, Ni, S
Product
Weight Assays, % % Distribution
g % Cu Ni S Cu Ni S
Cu 1st Cl Conc 7.9 0.40 29.3 0.40 30.7 40.3 0.4 5.1
Cu 1st Cl Tail 4.3 0.22 15.0 2.67 23.5 11.2 1.4 2.1
Cu Ro Tail 15.4 0.78 5.22 10.9 20.4 14.0 20.8 6.7
Bulk 3rd Clnr Tail 9.1 0.46 2.06 9.53 15.9 3.3 10.8 3.1
Bulk 2nd Clnr Tail 18.9 0.96 0.90 4.37 10.1 3.0 10.3 4.0
Bulk 1st Clnr Tail 52.9 2.68 0.12 0.43 1.80 1.1 2.8 2.0
Ni 4th Clnr Conc 4.0 0.20 7.29 9.33 28.7 5.1 4.6 2.4
Ni 4th Clnr Tail 1.6 0.08 1.95 6.54 23.4 0.5 1.3 0.8
Ni 3rd Clnr Tail 7.9 0.40 0.82 4.40 17.6 1.1 4.3 2.9
Ni 2nd Clnr Tail 46.8 2.37 0.26 2.07 13.9 2.1 12.0 13.8
Ni 1st Clnr Tail 111 5.63 0.10 0.28 3.39 1.9 3.9 8.0
Ni Scav Tail 1696 85.8 0.06 0.13 1.36 16.3 27.4 48.9
Head (calc.) 1976 100.0 0.29 0.41 2.39 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Cu 1st Clnr Conc 7.9 0.40 29.3 0.40 30.7 40.3 0.39 5.15
Cu Rougher Conc 12.2 0.62 24.3 1.20 28.2 51.6 1.82 7.29
Bulk 3rd Clnr Conc 27.6 1.40 13.6 6.61 23.8 65.6 22.7 14.0
Bulk 2nd Clnr Conc 36.7 1.86 10.8 7.34 21.9 68.9 33.4 17.0
Bulk 1st Clnr Conc 55.6 2.81 7.41 6.33 17.9 71.8 43.7 21.1
Bulk Rougher Conc 109 5.49 3.86 3.45 10.0 72.9 46.5 23.1
Ni 4th Clnr Conc 4.0 0.20 7.29 9.33 28.7 5.1 4.6 2.4
Ni 3rd Clnr Conc 5.6 0.28 5.76 8.53 27.2 5.6 5.9 3.2
Ni 2nd Clnr Conc 13.5 0.68 2.87 6.11 21.6 6.8 10.2 6.2
Ni 1st Clnr Conc 60.3 3.05 0.84 2.98 15.6 8.9 22.3 20.0
Ni Scav Conc 172 8.68 0.36 1.23 7.69 10.8 26.1 28.0
Bulk Rghr+Scav Conc 280 14.2 1.72 2.09 8.60 83.7 72.6 51.1
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S other Cp Pn Po Ga Cu Ni S Cp Pn Po Ga
Cu 1st Cl Conc 7.9 0.40 29.3 0.40 30.7 39.6 84.7 1.13 1.79 12.4 40.3 0.4 5.1 40.3 0.5 0.2 0.1
Cu 1st Cl Tail 4.3 0.22 15.0 2.67 23.5 58.8 43.4 7.54 15.1 34.0 11.2 1.4 2.1 11.2 1.7 0.7 0.1
Cu Ro Tail (Ni Conc.) 15.4 0.78 5.22 10.9 20.4 63.5 15.1 31.8 12.0 41.1 14.0 20.8 6.7 14.0 25.3 2.0 0.3
Bulk 3rd Clnr Tail 9.1 0.46 2.06 9.53 15.9 72.5 5.95 27.7 12.1 54.2 3.3 10.8 3.1 3.3 13.0 1.2 0.3
Bulk 2nd Clnr Tail 18.9 0.96 0.90 4.37 10.1 84.6 2.60 12.5 13.1 71.8 3.0 10.3 4.0 3.0 12.2 2.7 0.7
Bulk 1st Clnr Tail 52.9 2.68 0.12 0.43 1.80 97.7 0.35 1.06 3.44 95.2 1.1 2.8 2.0 1.1 2.9 2.0 2.7
Ni 4th Clnr Conc 4.0 0.20 7.29 9.33 28.7 54.7 21.1 26.8 32.3 19.8 5.1 4.6 2.4 5.1 5.5 1.4 0.0
Ni 4th Clnr Tail 1.6 0.08 1.95 6.54 23.4 68.1 5.64 18.5 39.7 36.2 0.5 1.3 0.8 0.5 1.5 0.7 0.0
Ni 3rd Clnr Tail 7.9 0.40 0.82 4.40 17.6 77.2 2.37 12.3 32.9 52.4 1.1 4.3 2.9 1.1 5.0 2.9 0.2
Ni 2nd Clnr Tail 46.8 2.37 0.26 2.07 13.9 83.8 0.75 5.45 30.7 63.1 2.1 12.0 13.8 2.1 13.2 15.9 1.6
Ni 1st Clnr Tail 111 5.63 0.10 0.28 3.39 96.2 0.29 0.55 8.05 91.1 1.9 3.9 8.0 1.9 3.1 9.9 5.5
Ni Scav Tail 1696 85.8 0.06 0.13 1.36 98.5 0.16 0.18 3.22 96.4 16.3 27.4 48.9 16.3 16.1 60.4 88.4
Head (calc.) 1976 100.0 0.29 0.41 2.39 96.9 0.84 0.98 4.58 93.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Cu 1st Clnr Conc 7.9 0.40 29.3 0.40 30.7 39.6 84.7 1.13 1.79 12.4 40.3 0.4 5.1 40.3 0.5 0.2 0.1
Cu Rougher Conc 12.2 0.62 24.3 1.20 28.2 46.4 70.1 3.39 6.49 20.0 51.6 1.8 7.3 51.6 2.1 0.9 0.1
Bulk 3rd Clnr Conc 27.6 1.40 13.6 6.61 23.8 55.9 39.4 19.2 9.56 31.8 65.6 22.7 14.0 65.6 27.4 2.9 0.5
Bulk 2nd Clnr Conc 36.7 1.86 10.8 7.34 21.9 60.0 31.1 21.3 10.2 37.4 68.9 33.4 17.0 68.9 40.4 4.1 0.7
Bulk 1st Clnr Conc 55.6 2.81 7.41 6.33 17.9 68.4 21.4 18.3 11.2 49.1 71.8 43.7 21.1 71.8 52.6 6.9 1.5
Bulk Rougher Conc 109 5.49 3.86 3.45 10.0 82.7 11.1 9.92 7.41 71.5 72.9 46.5 23.1 72.9 55.5 8.9 4.2
Ni 4th Clnr Conc 4.0 0.20 7.29 9.33 28.7 54.7 21.1 26.8 32.3 19.8 5.1 4.6 2.4 5.1 5.5 1.4 0.0
Ni 3rd Clnr Conc 5.6 0.28 5.76 8.53 27.2 58.5 16.7 24.5 34.4 24.5 5.6 5.9 3.2 5.6 7.1 2.1 0.1
Ni 2nd Clnr Conc 13.5 0.68 2.87 6.11 21.6 69.4 8.30 17.3 33.6 40.8 6.8 10.2 6.2 6.8 12.1 5.0 0.3
Ni 1st Clnr Conc 60.3 3.05 0.84 2.98 15.6 80.6 2.44 8.11 31.3 58.1 8.9 22.3 20.0 8.9 25.2 20.9 1.9
Ni Scav Conc 172 8.68 0.36 1.23 7.69 90.7 1.05 3.21 16.2 79.5 10.8 26.1 28.0 10.8 28.4 30.8 7.4
Bulk Rghr+Scav Conc 280 14.2 1.72 2.09 8.60 87.6 4.96 5.81 12.8 76.4 83.7 72.6 51.1 83.7 83.9 39.6 11.6