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

Test: F30 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: 74 µm
Conditions: Ni regrind K80: 30 µm
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX 4037 CMC Calgon MIBC* Grind Cond. Froth pH Eh
Grind 57
Bulk Rougher 1 10 40 10 1 2 8.8 124.4
Bulk Rougher 2 5 40 5 1 2 8.7 66.7
Ni Scav 1 30 40 6 8.7 53.4
Ni Scav 2 30 40 6 8.7 47.8
Combine Ro Conc 1-2
Bulk 1st Cleaner 0+0+2 10+10+0 0+2+0 3+2+1 8.6 92.2
Regrind (PM) 0
Bulk 2nd Cleaner 5 2+2 8.4 109.6
Bulk 3rd Cleaner 2
Combine Scav Conc 1-2
Ni 1st Cleaner 10+10 30+0 2+2 8.7 79.5
Regrind (PM) 4
Ni 2nd Cleaner 5+5 5+0 2 8.5 59.0
Ni 3rd Cleaner 10 2 7.5 165.8
Total 0 75 0 165 10 15 61 2
*As needed
22
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.
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
Bulk 3rd Clnr Conc. 31.7 1.62 14.2 4.79 22.4 75.3 19.7 14.9
Bulk 3rd Clnr Tail 1.6 0.08 1.12 4.24 21.1 0.3 0.9 0.7
Bulk 2nd Clnr Tail 28.7 1.47 0.95 5.83 9.51 4.6 21.7 5.7
Bulk 1st Clnr Tail 48.6 2.48 0.17 1.41 3.93 1.4 8.9 4.0
Ni 3rd Clnr Conc 8.6 0.44 2.64 6.08 13.2 3.8 6.8 2.4
Ni 3rd Clnr Tail 2.8 0.14 2.68 6.18 26.4 1.3 2.2 1.6
Ni 2nd Clnr Tail 24.3 1.24 0.34 1.97 14.4 1.4 6.2 7.4
Ni 1st Clnr Tail 114.8 5.86 0.18 0.47 7.40 3.5 7.0 17.9
Ni Scav Tail 1697 86.7 0.03 0.12 1.27 8.5 26.5 45.4
Head (calc.) 1959 100.0 0.31 0.39 2.43 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 3rd Clnr Conc 31.7 1.62 14.2 4.79 22.4 75.3 19.7 14.9
Bulk 2nd Clnr Conc 33.3 1.70 13.6 4.76 22.3 75.6 20.6 15.7
Bulk 1st Clnr Conc 62.0 3.17 7.73 5.26 16.4 80.2 42.4 21.4
Bulk Rougher Conc 111 5.65 4.41 3.57 10.9 81.6 51.3 25.4
Ni 3rd Clnr Conc 8.6 0.44 2.64 6.08 13.2 3.8 6.8 2.4
Ni 2nd Clnr Conc 11.4 0.58 2.65 6.10 16.4 5.1 9.0 3.9
Ni 1st Clnr Conc 35.7 1.82 1.08 3.29 15.1 6.4 15.3 11.3
Ni Scav Conc 151 7.68 0.39 1.14 9.22 9.9 22.3 29.2
Bulk Rghr+Scav Conc 261 13.3 2.09 2.17 9.94 91.5 73.5 54.62
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. 31.7 1.62 14.2 4.79 22.4 58.6 41.0 13.9 8.95 36.1 75.3 19.7 14.9 75.3 24.0 3.1 0.6
Bulk 3rd Clnr Tail 1.6 0.08 1.12 4.24 21.1 73.5 3.24 11.7 41.8 43.3 0.3 0.9 0.7 0.3 1.0 0.7 0.04
Bulk 2nd Clnr Tail 28.7 1.47 0.95 5.83 9.51 83.7 2.75 16.9 7.70 72.7 4.6 21.7 5.7 4.6 26.5 2.4 1.1
Bulk 1st Clnr Tail 48.6 2.48 0.17 1.41 3.93 94.5 0.49 3.90 6.40 89.2 1.4 8.9 4.0 1.4 10.4 3.4 2.4
Ni 3rd Clnr Conc 8.6 0.44 2.64 6.08 13.2 78.1 7.63 17.6 12.3 62.5 3.8 6.8 2.4 3.8 8.2 1.1 0.3
Ni 3rd Clnr Tail 2.8 0.14 2.68 6.18 26.4 64.7 7.75 17.3 46.6 28.4 1.3 2.2 1.6 1.3 2.6 1.4 0.0
Ni 2nd Clnr Tail 24.3 1.24 0.34 1.97 14.4 83.3 0.98 5.14 32.0 61.9 1.4 6.2 7.4 1.4 6.8 8.5 0.8
Ni 1st Clnr Tail 114.8 5.86 0.18 0.47 7.40 92.0 0.52 0.95 17.9 80.6 3.5 7.0 17.9 3.5 5.9 22.4 5.1
Ni Scav Tail 1697 86.7 0.03 0.12 1.27 98.6 0.09 0.16 3.08 96.7 8.5 26.5 45.4 8.5 14.5 56.9 89.6
Head (calc.) 1959 100.0 0.31 0.39 2.43 96.9 0.88 0.94 4.68 93.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 3rd Clnr Conc 31.7 1.62 14.2 4.79 22.4 58.6 41.0 13.9 8.95 36.1 75.3 19.7 14.9 75.3 24.0 3.1 0.6
Bulk 2nd Clnr Conc 33.3 1.70 13.6 4.76 22.3 59.3 39.2 13.8 10.5 36.5 75.6 20.6 15.7 75.6 25.0 3.8 0.7
Bulk 1st Clnr Conc 62.0 3.17 7.73 5.26 16.4 70.6 22.3 15.2 9.22 53.2 80.2 42.4 21.4 80.2 51.5 6.2 1.8
Bulk Rougher Conc 111 5.65 4.41 3.57 10.9 81.1 12.7 10.2 7.98 69.0 81.6 51.3 25.4 81.6 61.9 9.6 4.2
Ni 3rd Clnr Conc 8.6 0.44 2.64 6.08 13.2 78.1 7.63 17.6 12.3 62.5 3.8 6.8 2.4 3.8 8.2 1.1 0.3
Ni 3rd Clnr Conc 11.4 0.58 2.65 6.10 16.4 74.8 7.66 17.5 20.7 54.1 5.1 9.0 3.9 5.1 10.9 2.6 0.3
Ni 1st Clnr Conc 35.7 1.82 1.08 3.29 15.1 80.6 3.11 9.09 28.4 59.4 6.4 15.3 11.3 6.4 17.7 11.1 1.2
Ni Scav Conc 151 7.68 0.39 1.14 9.22 89.3 1.14 2.88 20.4 75.6 9.9 22.3 29.2 9.9 23.6 33.4 6.2
Bulk Rghr+Scav Conc 261 13.3 2.09 2.17 9.94 85.8 6.05 6.00 15.1 72.8 91.5 73.5 54.6 91.5 85.5 43.1 10.4