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

Test: F38 Project: 11603-005 50149-001 Date: 06-Mar-12 Operator: YW
Purpose: Split flowsheet, CMC and Guar 50:50 mix similar to F-36, no CMC or Guar in the roughers
Procedure: As below.
Feed: 2 kg of -10 mesh Master Composite
Grind: 57 minutes/2 kg at 65% solids in a lab mill
Regrind 15 minutes in the pebble mill
Feed K80 : 90 µm
Ni regrind K80: 41 µm
Conditions:
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX CuSO4 CMC Guar MIBC* Grind Cond. Froth pH Eh
Grind 57
Bulk Rougher 1 15 12 1 3 8.5 81.9
Bulk Rougher 2 20 6 1 3 8.5 49.8
Ni Scav 1 30 200 6 6 8.2 121.9
Ni Scav 2 30 6 8.3 57.6
Ni Scav 3 30 6 8.2 18.2
Combine Ro Conc 1-2
Bulk 1st Cleaner A 10 10 2 8.5 53.5
B 10 2
Bulk 2nd Cleaner A 0 5 5 2 8.3 65.3
B 5 2
Combine Scav Conc 1-3
Regrind (PM) 15
Ni 1st Cleaner 20 15 15 3 8.5 79.0
10 3
Ni 2nd Cleaner 5 5 5 4 8.4 29.6
Ni 3rd Cleaner 1 2.5 2.5 3 8.2 6.5
Total 0 176 200 37.5 37.5 24 72 2 45
*As needed
Stage Rougher 1st cleaners 2nd & 3rd clnr & sep Assay for Cu, Ni, S
Flotation Cell 1000 g D-12 500 g D-12 250 g D-12 PSA on regrind
Speed: r.p.m. 1800 1600 1200 Send to sherbrooke
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S Cu Ni S
Bulk 2nd Clnr Conc. 62.8 3.18 9.34 7.20 24.2 79.4 47.5 23.3
Bulk 2nd Clnr Tail 55.3 2.80 0.55 2.85 9.60 4.1 16.6 8.1
Bulk 1st Clnr Tail 63 3.19 0.13 0.66 4.73 1.1 4.4 4.6
Ni 3rd Clnr Conc 26.8 1.36 0.69 1.50 30.0 2.5 4.2 12.3
Ni 3rd Clnr Tail 26.7 1.35 0.27 1.07 23.8 1.0 3.0 9.7
Ni 2nd Clnr Tail 39.1 1.98 0.25 0.81 14.7 1.3 3.3 8.8
Ni 1st Clnr Tail 138 6.97 0.11 0.31 7.95 2.1 4.5 16.8
Ni Scav Tail 1565 79.2 0.04 0.10 0.68 8.5 16.5 16.3
Head (calc.) 1976 100.0 0.37 0.48 3.30 100.0 100.0 100.0
(direct) 0.33 0.42 2.53
Combined Products Cu Ni
Bulk 2nd Clnr Conc 62.8 3.18 9.34 7.20 24.2 79.4 47.5 23.3 95.1 74.2
Bulk 1st Clnr Conc 118.1 5.98 5.22 5.16 17.4 83.6 64.1 31.4 98.7 93.6
Bulk Rougher Conc 181.1 9.17 3.45 3.60 13.0 84.7 68.5 36.0
Ni 3rd Clnr Conc 26.8 1.36 0.69 1.50 30.0 2.5 4.2 12.3
Ni 2nd Clnr Conc 53.5 2.71 0.48 1.29 26.9 3.5 7.2 22.1
Ni 1st Clnr Conc 92.6 4.69 0.38 1.08 21.8 4.8 10.6 30.9
Ni Scav Conc 230.3 11.7 0.22 0.62 13.5 6.9 15.1 47.7
Bulk Rghr+Scav Conc 411.4 20.8 1.64 1.93 13.3 91.5 83.5 83.7
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S other Cp Pn Po Ga Cu Ni S Cp Pn Po Ga
Bulk 2nd Clnr Conc. 62.8 3.18 9.34 7.20 24.2 59.3 27.0 20.8 20.5 31.8 79.4 47.5 23.3 79.4 56.6 9.89 1.11
Bulk 2nd Clnr Tail 55.3 2.80 0.55 2.85 9.60 87.0 1.59 7.98 16.6 73.8 4.1 16.6 8.1 4.1 19.2 7.07 2.27
Bulk 1st Clnr Tail 63 3.19 0.13 0.66 4.73 94.5 0.38 1.63 10.5 87.5 1.1 4.4 4.6 1.1 4.5 5.1 3.1
Ni 3rd Clnr Conc 26.8 1.36 0.69 1.50 30.0 67.8 1.99 3.09 73.3 21.6 2.5 4.2 12.3 2.5 3.6 15.1 0.3
Ni 3rd Clnr Tail 26.7 1.35 0.27 1.07 23.8 74.9 0.78 2.05 59.2 38.0 1.0 3.0 9.7 1.0 2.4 12.2 0.6
Ni 2nd Clnr Tail 39.1 1.98 0.25 0.81 14.7 84.2 0.72 1.66 36.0 61.6 1.3 3.3 8.8 1.3 2.8 10.8 1.3
Ni 1st Clnr Tail 138 6.97 0.11 0.31 7.95 91.6 0.32 0.44 19.9 79.3 2.1 4.5 16.8 2.1 2.7 21.1 6.1
Ni Scav Tail 1565 79.2 0.04 0.10 0.68 99.2 0.12 0.12 1.55 98.2 8.5 16.5 16.3 8.5 8.3 18.7 85.3
Head (calc.) 1976 100.0 0.37 0.48 3.30 95.8 1.08 1.17 6.57 91.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 2nd Clnr Conc 62.8 3.18 9.34 7.20 24.2 59.3 27.0 20.8 20.5 31.8 79.4 47.5 23.3 79.4 56.6 9.9 1.1
Bulk 1st Clnr Conc 118.1 5.98 5.22 5.16 17.4 72.2 15.1 14.8 18.7 51.5 83.6 64.1 31.4 83.6 75.8 17.0 3.4
Bulk Rougher Conc 181.1 9.17 3.45 3.60 13.0 80.0 10.0 10.2 15.8 64.0 84.7 68.5 36.0 84.7 80.3 22.1 6.4
Ni 3rd Clnr Conc 26.8 1.36 0.69 1.50 30.0 67.8 1.99 3.09 73.3 21.6 2.5 4.2 12.3 2.5 3.6 15.1 0.3
Ni 2nd Clnr Conc 53.5 2.71 0.48 1.29 26.9 71.3 1.39 2.57 66.3 29.8 3.5 7.2 22.1 3.5 6.0 27.3 0.9
Ni 1st Clnr Conc 92.6 4.69 0.38 1.08 21.8 76.8 1.11 2.18 53.5 43.2 4.8 10.6 30.9 4.8 8.8 38.1 2.2
Ni Scav Conc 230.3 11.66 0.22 0.62 13.5 85.7 0.64 1.14 33.4 64.8 6.9 15.1 47.7 6.9 11.4 59.2 8.3
Bulk Rghr+Scav Conc 411.4 20.8 1.64 1.93 13.3 83.2 4.75 5.13 25.7 64.4 91.5 83.5 83.7 91.5 91.7 81.3 14.7