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

Test: HNI-F5 Project: 11603-005 50149-001 Date: 06-Mar-12 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 15 minutes in the pebble mill (Ni scav concentrate)
Target Feed K80 : 90 µm
Ni regrind K80: 37 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 8.6 3.7
Bulk Rougher 2 15 1 3 8.6 -71.1
Ni Scav 1 20 6 8.6 -8.3
Ni Scav 2 20 6 8.5 -2.2
Ni Scav 3 20 6 8.5 -1.3
Combine Ro Conc 1-2
Bulk 1st Cleaner A 10 10 2 8.5 64.7
B 2 2
Bulk 2nd Cleaner 0 5 5 2 8.3 63.7
5 2
Combine Scav Conc 1-3
Regrind (PM) 15
Ni 1st Cleaner 5 5 5 3 8.6 53.6
2 3
Ni 2nd Cleaner 2 2 2 4 8.5 66.3
Ni 3rd Cleaner 3 8.2 22.6
Total 0 106 0 22 22 12 72 2
*As needed
45
Stage Roughers 1stClnr and Scav. 2nd, 3rd Cleaner
PSA on Ni regrind
Flotation Cell 1000g-D12 500-g D12 250-g D12
Assay for Cu, Ni, S
Speed: rpm 1800 1600 1100
To Sherbrooke
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S Cu Ni S
Bulk 2nd Clnr Conc. 102 5.19 7.91 8.75 28.5 79.2 55.3 21.3
Bulk 2nd Clnr Tail 48.6 2.46 0.23 1.07 16.8 1.1 3.2 6.0
Bulk 1st Clnr Tail 162 8.23 0.09 0.45 13.1 1.4 4.5 15.5
Ni 3rd Clnr Conc 14.8 0.75 4.04 3.73 24.0 5.9 3.4 2.6
Ni 3rd Clnr Tail 14.9 0.76 0.47 1.90 20.1 0.7 1.7 2.2
Ni 2nd Clnr Tail 32.2 1.63 0.55 2.29 9.96 1.7 4.6 2.3
Ni 1st Clnr Tail 100 5.07 0.27 1.86 13.6 2.6 11.5 9.9
Ni Scav Tail 1498 75.9 0.05 0.17 3.67 7.3 15.7 40.1
Head (calc.) 1973 100.0 0.52 0.82 6.94 100.0 100.0 100.0
(direct)
Combined Products
0.52 0.83 6.45
Bulk 2nd Clnr Conc 102 5.19 7.91 8.75 28.5 79.2 55.3 21.3
Bulk 1st Clnr Conc 151 7.65 5.44 6.28 24.7 80.3 58.5 27.3
Bulk Rougher Conc 313 15.9 2.67 3.26 18.7 81.8 63.1 42.8
Ni 3rd Clnr Conc 15 0.75 4.04 3.73 24.0 5.9 3.4 2.59
Ni 2nd Clnr Conc 30 1.51 2.25 2.81 22.0 6.5 5.2 4.78
Ni 1st Clnr Conc 62 3.14 1.37 2.54 15.8 8.3 9.7 7.13
Ni Scav Conc 162 8.21 0.69 2.12 14.4 10.9 21.2 17.1
Bulk Rghr+Scav Conc 475 24.1 1.99 2.87 17.25 92.7 84.3 59.9
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. 102.3 5.19 7.91 8.75 28.5 54.8 22.9 25.1 31.6 20.4 79.2 55.3 21.3 79.2 64.3 11.0 1.3
Bulk 2nd Clnr Tail 48.6 2.46 0.23 1.07 16.8 81.9 0.7 2.3 40.9 56.1 1.1 3.2 6.0 1.1 2.8 6.8 1.7
Bulk 1st Clnr Tail 162.3 8.23 0.09 0.45 13.1 86.4 0.3 0.6 33.2 65.9 1.4 4.5 15.5 1.4 2.6 18.3 6.7
Ni 3rd Clnr Conc 14.8 0.75 4.04 3.73 24.0 68.2 11.7 10.2 42.9 35.3 5.9 3.4 2.6 5.9 3.8 2.2 0.3
Ni 3rd Clnr Tail 14.9 0.76 0.47 1.90 20.1 77.5 1.4 4.7 46.8 47.1 0.7 1.7 2.2 0.7 1.7 2.4 0.4
Ni 2nd Clnr Tail 32.2 1.63 0.55 2.29 10.0 87.2 1.6 6.3 19.0 73.1 1.7 4.6 2.3 1.7 5.1 2.1 1.5
Ni 1st Clnr Tail 100.0 5.07 0.27 1.86 13.6 84.3 0.8 4.8 30.4 64.0 2.6 11.5 9.9 2.6 12.1 10.3 4.0
Ni Scav Tail 1498 75.9 0.05 0.17 3.67 96.1 0.1 0.2 9.2 90.4 7.3 15.7 40.1 7.3 7.7 46.9 84.2
Head (calc.) 1973 100.0 0.52 0.82 6.94 91.7 1.50 2.03 14.9 81.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.52 0.83 6.45
Bulk 2nd Clnr Conc 102 5.19 7.9 8.8 28.5 54.8 22.9 25.1 31.6 20.4 79.2 55.3 21.3 79.2 64.3 11.0 1.3
Bulk 1st Clnr Conc 151 7.65 5.44 6.28 24.7 63.6 15.7 17.8 34.6 31.9 80.3 58.5 27.3 80.3 67.1 17.8 3.0
Bulk Rougher Conc 313 15.9 2.67 3.26 18.7 75.4 7.7 8.9 33.9 49.5 81.8 63.1 42.8 81.8 69.7 36.1 9.6
Ni 3rd Clnr Conc 14.8 0.75 4.04 3.73 24.0 68.2 11.7 10.2 42.9 35.3 5.9 3.4 2.6 5.9 3.8 2.2 0.3
Ni 2nd Clnr Conc 29.7 1.51 2.25 2.81 22.0 72.9 6.50 7.42 44.9 41.2 6.5 5.2 4.8 6.5 5.5 4.5 0.8
Ni 1st Clnr Conc 62 3.14 1.37 2.54 15.8 80.3 3.95 6.83 31.4 57.8 8.3 9.7 7.1 8.3 10.6 6.6 2.2
Ni Scav Conc 162 8.2 0.69 2.12 14.4 82.8 1.99 5.60 30.8 61.6 10.9 21.2 17.1 10.9 22.7 17.0 6.2
Bulk Rghr+Scav Conc 475 24.1 1.99 2.87 17.2 77.9 5.76 7.78 32.8 53.7 92.7 84.3 59.9 92.7 92.3 53.1 15.8