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

Test: F31 Project: 11603-005 50149-001 Date: 09-Feb-12 Operator: YW
Purpose: Split flowsheet
Procedure: As below.
Feed: 2 kg of -10 mesh Master Composite
Grind: 57 minutes/2 kg at 65% solids in a lab mill
Regrind 4 minutes in the pebble mill (Ni clnr 1 concentrate)
Regrind Feed K80 :90 µm
Cu regrind K80: 75 µm
Conditions: Ni regrind K80: 51 µm
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX CuSO4 CMC Guar Gum MIBC* Grind Cond. Froth pH Eh
Grind 57
Bulk Rougher 1 10 40 10 1 2 9.0 -133.1
Bulk Rougher 2 5 40 5 1 2 9.0 83.5
Ni Scav 1 30 40 1 6 9.0 70.0
Ni Scav 2 30 40 1 6 8.8 70.5
Ni Scav 3 30 200 2
Combine Ro Conc 1-2
Bulk 1st Cleaner 0+2 15 3+1
Regrind (PM) 0
Bulk 2nd Cleaner 0+2 10 4
Bulk 3rd Cleaner 2 7.9 135.9
Combine Scav Conc 1-2
Ni 1st Cleaner 20 30 4 8.7 115.7
Regrind (PM) 4
Ni 2nd Cleaner 10 10 10 2 8.4 130.1
Ni 3rd Cleaner 2 7.7 144.7
Total 0 135 200 205 20 25 61 4
*As needed
32
Stage Rougher 1st cleaners 2nd & 3rd clnr & sep
Flotation Cell 1000 g D-12 500 g D-12 250 g D-12
Speed: r.p.m. 1800 1600 1200
Assay for Cu, Ni, S
Metallurgical Balance
Product
Weight Assays, % % Distribution
g % Cu Ni S Cu Ni S
Bulk 3rd Clnr Conc. 23.4 1.19 16.4 3.70 24.4 63.8 10.8 12.3
Bulk 3rd Clnr Tail 11.2 0.57 3.51 7.90 17.4 6.5 11.1 4.2
Bulk 2nd Clnr Tail 38.8 1.97 0.76 6.17 11.4 4.9 29.9 9.5
Bulk 1st Clnr Tail 45.3 2.30 0.09 0.66 2.79 0.7 3.7 2.7
Ni 3rd Clnr Conc 2.7 0.14 4.65 6.76 30.3 2.1 2.3 1.8
Ni 3rd Clnr Tail 1.9 0.10 1.45 4.53 26.0 0.5 1.1 1.1
Ni 2nd Clnr Tail 28.3 1.44 0.39 1.98 20.9 1.8 7.0 12.7
Ni 1st Clnr Tail 91.6 4.65 0.18 0.45 5.30 2.7 5.2 10.4
Ni Scav 3 27.9 1.42 0.12 0.39 10.4 0.6 1.4 6.2
Ni Scav Tail 1699 86.2 0.06 0.13 1.07 16.4 27.6 39.1
Head (calc.) 1970 100.0 0.31 0.41 2.36 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 3rd Clnr Conc 23.4 1.19 16.4 3.70 24.4 63.8 10.8 12.3
Bulk 2nd Clnr Conc 34.6 1.76 12.2 5.06 22.1 70.3 21.9 16.5
Bulk 1st Clnr Conc 73.4 3.73 6.17 5.65 16.5 75.3 51.8 26.0
Bulk Rougher Conc 119 6.03 3.85 3.74 11.2 75.9 55.5 28.7
Ni 3rd Clnr Conc 2.7 0.14 4.65 6.76 30.3 2.1 2.3 1.8
Ni 2nd Clnr Conc 4.6 0.23 3.33 5.84 28.5 2.5 3.4 2.8
Ni 1st Clnr Conc 32.9 1.67 0.80 2.52 22.0 4.4 10.4 15.5
Ni Scav 1 & 2 Conc 125 6.32 0.34 1.00 9.70 7.1 15.5 26.0
Bulk Rghr+Scav Conc 271 13.8 1.85 2.14 10.4 83.6 72.4 60.9
Metallurgical Balance
Product
Weight Assays, %
% Distribution
g % Cu Ni S other Cp Pn Po Ga Cu Ni S Cp Pn Po Ga
Bulk 3rd Clnr Conc. 23.4 1.19 16.4 3.70 24.4 55.5 47.4 10.6 11.1 30.8 63.8 10.8 12.3 65.2 14.1 3.1 0.4
Bulk 3rd Clnr Tail 11.2 0.57 3.51 7.90 17.4 71.2 10.1 22.9 16.3 50.7 6.5 11.1 4.2 6.7 14.5 2.2 0.3
Bulk 2nd Clnr Tail 38.8 1.97 0.76 6.17 11.4 81.7 2.2 17.8 12.3 67.7 4.9 29.9 9.5 5.0 39.1 5.7 1.4
Bulk 1st Clnr Tail 45.3 2.30 0.09 0.66 2.79 96.5 0.3 1.71 5.53 92.5 0.7 3.7 2.7 0.7 4.4 3.0 2.3
Ni 3rd Clnr Conc 2.7 0.14 4.65 6.76 30.3 58.3 13.4 19.0 50.1 17.5 2.1 2.3 1.8 2.1 2.9 1.6 0.0
Ni 3rd Clnr Tail 1.9 0.10 1.45 4.53 26.0 68.0 4.2 12.3 53.0 30.5 0.5 1.1 1.1 0.5 1.3 1.2 0.0
Ni 2nd Clnr Tail 28.3 1.44 0.39 1.98 20.9 76.7 0.5 0.98 12.4 86.1 1.8 7.0 12.7 0.9 1.6 4.2 1.3
Ni 1st Clnr Tail 91.6 4.65 0.18 0.45 5.30 94.1 0.3 0.58 26.1 72.9 2.7 5.2 10.4 1.9 3.0 28.5 3.6
Ni Scav 3 27.9 1.42 0.12 0.39 10.4 89.1 0.2 0.20 2.45 97.2 0.6 1.4 6.2 0.3 0.3 0.8 1.5
Ni Scav Tail 1698.9 86.2 0.06 0.13 1.07 98.7 0.2 0.20 2.45 97.2 16.4 27.6 39.1 16.8 18.8 49.7 89.2
Head (calc.) 1970.0 100.0 0.31 0.41 2.36 96.9 0.86 0.90 4.26 94.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 3rd Clnr Conc 23.4 1.19 16.4 3.70 24.4 55.5 47.4 10.6 11.1 30.8 63.8 10.8 12.3 65.2 14.1 3.1 0.4
Bulk 2nd Clnr Conc 34.6 1.76 12.2 5.06 22.1 60.6 35.3 14.6 12.8 37.2 70.3 21.9 16.5 71.9 28.6 5.3 0.7
Bulk 1st Clnr Conc 73.4 3.73 6.17 5.65 16.5 71.7 17.8 16.3 12.5 53.3 75.3 51.8 26.0 76.9 67.7 11.0 2.1
Bulk Rougher Conc 118.7 6.03 3.85 3.74 11.2 81.2 11.1 10.7 9.9 68.3 75.9 55.5 28.7 77.6 72.1 14.0 4.4
Ni 3rd Clnr Conc 2.7 0.14 4.65 6.76 30.3 58.3 13.4 19.0 50.1 17.5 2.1 2.3 1.8 2.1 2.9 1.6 0.0
Ni 3rd Clnr Conc 4.6 0.23 3.33 5.84 28.5 62.3 9.62 16.2 51.3 22.9 2.5 3.4 2.8 2.6 4.2 2.8 0.1
Ni 1st Clnr Conc 32.9 1.67 0.80 2.52 22.0 74.7 1.79 3.11 17.9 77.2 4.4 10.4 15.5 3.5 5.8 7.0 1.4
Ni Scav 1 & 2 Conc 124.5 6.32 0.34 1.00 9.70 89.0 0.73 1.25 23.9 74.1 7.1 15.5 26.0 5.3 8.8 35.5 5.0
Bulk Rghr+Scav Conc 271.1 13.76 1.84 2.10 9.38 86.7 5.20 5.27 15.3 63.9 83.6 72.4 60.9 83.2 81.2 50.3 10.8