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

Test: HNI-F4 Project: 11603-005 50149-001 Date: March 1 2012 Operator: YW
Purpose: Split flowsheet, CMC and Guar 50:50 mix
Procedure: As below.
Feed: 2 kg of -10 mesh High Ni Composite
Grind: 57 minutes/2 kg at 65% solids in a lab mill
Regrind 8 minutes in the pebble mill (Ni scav concentrate)
Target Feed K80 : 90 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 8.4 94.1
Bulk Rougher 2 10 1 3 8.4 24.6
Ni Scav 1 30 6 8.4 -8.8
Ni Scav 2 30 6 8.3 -7.2
Ni Scav 3 30 6 8.2 -55.4
Combine Ro Conc 1-2
Bulk 1st Cleaner A 10 10 2 8.3 74.3
B 2 2
Bulk 2nd Cleaner 0 5 5 2 8.0 82.5
5 2
Combine Scav Conc 1-3
Regrind (PM) 8
Ni 1st Cleaner 7.5 10 10 3 8.5 61.1
5 3
Ni 2nd Cleaner 2 1 1 4 7.6 113.3
Ni 3rd Cleaner 3
Total 0 136.5 0 26 26 12 65 2
*As needed
45
Stage
Roughers 1stClnr and Scav. 2nd, 3rd Cleaner
Flotation Cell
1000g-D12 500-g D12 250-g D12
Speed: rpm
1800 1600
1100
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni Pt Pd Au S Fe MgO Cu Ni Pt Pd Au S Fe MgO
Bulk 2nd Clnr Conc. 79.0 4.00 9.68 9.07 2.35 7.46 0.81 28.0 35.3 2.51 77.0 43.3 17.3 52.1 32.94 16.6 7.7 0.5
Bulk 2nd Clnr Tail 44.0 2.23 0.78 5.55 1.80 2.59 0.14 16.5 27.3 12.9 3.5 14.8 7.4 10.1 3.17 5.4 3.3 1.5
Bulk 1st Clnr Tail 77.8 3.94 0.27 2.13 1.10 0.72 0.06 10.6 20.5 18.2 2.1 10.0 8.0 5.0 2.40 6.2 4.4 3.7
Ni 3rd Clnr Conc 31.0 1.57 1.62 2.80 3.2 2.00 1.46 30.2 47.2 4.31 5.1 5.2 9.1 5.5 23.30 7.0 4.1 0.4
Ni 3rd Clnr Tail 16.8 0.85 0.45 1.88 2.06 1.02 0.26 27.2 44.3 6.44 0.8 1.9 3.2 1.5 2.25 3.4 2.1 0.3
Ni 2nd Clnr Tail 42.8 2.17 0.33 1.35 1.78 0.81 0.20 21.0 36.8 10.5 1.4 3.5 7.1 3.1 4.41 6.7 4.4 1.2
Ni 1st Clnr Tail 154 7.80 0.13 0.50 0.84 0.38 0.10 13.4 26.0 14.2 2.0 4.7 12.1 5.2 7.93 15.5 11.1 5.8
Ni Scav Tail 1529 77.4 0.05 0.18 0.25 0.13 0.03 3.42 14.8 21.4 8.2 16.6 35.7 17.6 23.61 39.2 62.9 86.6
Head (calc.) 1974 100.0 0.50 0.84 0.54 0.57 0.10 6.76 18.2 19.1 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.52 0.83 0.57 0.61 0.10 6.45 18.1 19.8
Bulk 2nd Clnr Conc 79 4.00 9.68 9.07 2.4 7.46 0.81 28.0 35.3 2.51 77.0 43.3 17.34 52.14 32.94 16.57 7.75 0.52
Bulk 1st Clnr Conc 123 6.23 6.50 7.81 2.2 5.72 0.57 23.9 32.4 6.23 80.5 58.1 24.74 62.22 36.11 22.01 11.1 2.03
Bulk Rougher Conc 201 10.2 4.08 5.61 1.75 3.78 0.37 18.7 27.8 10.9 82.6 68.1 32.74 67.17 38.51 28.19 15.5 5.78
Ni 3rd Clnr Conc 31 1.57 1.62 2.80 3.2 2.00 1.46 30.2 47.2 4.31 5.1 5.2 9.12 5.48 23.30 7.01 4.06 0.35
Ni 2nd Clnr Conc 48 2.42 1.21 2.48 2.8 1.66 1.04 29.1 46.2 5.06 5.8 7.2 12.35 7.00 25.55 10.44 6.13 0.64
Ni 1st Clnr Conc 91 4.59 0.79 1.94 2.3 1.26 0.64 25.3 41.7 7.63 7.2 10.6 19.47 10.07 29.95 17.17 10.5 1.83
Ni Scav Conc 245 12.4 0.38 1.04 1.38 0.70 0.30 17.8 31.8 11.8 9.3 15.3 31.56 15.24 37.88 32.63 21.6 7.62
Bulk Rghr+Scav Conc 445 22.6 2.05 3.10 1.55 2.09 0.33 18.2 30.0 11.4 91.8 83.4 64.29 82.42 76.39 60.82 37.1 13.39
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. 79.0 4.00 9.68 9.07 28.0 53.3 28.0 26.2 24.8 21.0 77.0 43.3 16.6 77.0 50.2 6.9 1.0
Bulk 2nd Clnr Tail 44.0 2.23 0.78 5.55 16.5 77.2 2.3 15.8 27.2 54.8 3.5 14.8 5.4 3.5 16.8 4.2 1.5
Bulk 1st Clnr Tail 77.8 3.94 0.27 2.13 10.6 87.0 0.8 5.8 21.8 71.6 2.1 10.0 6.2 2.1 10.9 6.0 3.4
Ni 3rd Clnr Conc 31.0 1.57 1.62 2.80 30.2 65.4 4.7 7.0 68.0 20.3 5.1 5.2 7.0 5.1 5.3 7.4 0.4
Ni 3rd Clnr Tail 16.8 0.85 0.45 1.88 27.2 70.5 1.3 4.3 65.6 28.8 0.8 1.9 3.4 0.8 1.8 3.9 0.3
Ni 2nd Clnr Tail 42.8 2.17 0.33 1.35 21.0 77.3 1.0 3.0 51.0 45.1 1.4 3.5 6.7 1.4 3.1 7.7 1.2
Ni 1st Clnr Tail 154.0 7.80 0.13 0.50 13.4 86.0 0.4 0.8 33.7 65.1 2.0 4.7 15.5 2.0 2.9 18.2 6.2
Ni Scav Tail 1529 77.4 0.05 0.18 3.42 96.3 0.2 0.2 8.5 91.1 8.2 16.6 39.2 8.2 9.1 45.7 86.0
Head (calc.) 1974 100.0 0.50 0.84 6.76 91.9 1.45 2.09 14.4 82.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.52 0.83 6.45
Bulk 2nd Clnr Conc 79 4.00 9.68 9.07 28.0 53.3 28.0 26.2 24.8 21.0 77.0 43.3 16.6 77.0 50.2 6.9 1.0
Bulk 1st Clnr Conc 123 6.23 6.50 7.81 23.9 61.8 18.8 22.5 25.6 33.1 80.5 58.1 22.0 80.5 67.0 11.1 2.5
Bulk Rougher Conc 201 10.2 4.08 5.61 18.7 71.6 11.8 16.0 24.2 48.0 82.6 68.1 28.2 82.6 77.9 17.1 6.0
Ni 3rd Clnr Conc 31.0 1.57 1.62 2.80 30.2 65.4 4.68 7.01 68.0 20.3 5.1 5.2 7.0 5.1 5.3 7.4 0.4
Ni 2nd Clnr Conc 47.8 2.42 1.21 2.48 29.1 67.2 3.49 6.06 67.2 23.3 5.8 7.2 10.4 5.8 7.0 11.3 0.7
Ni 1st Clnr Conc 91 4.59 0.79 1.94 25.3 72.0 2.29 4.62 59.5 33.6 7.2 10.6 17.2 7.2 10.1 19.0 1.9
Ni Scav Conc 245 12.4 0.38 1.04 17.8 80.8 1.09 2.20 43.3 53.4 9.3 15.3 32.6 9.3 13.1 37.2 8.1
Bulk Rghr+Scav Conc 445 22.6 2.05 3.10 18.2 76.6 5.92 8.42 34.7 51.0 91.8 83.4 60.8 91.8 90.9 54.3 14.0