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

Test: F41 Project: 11603-005 50149-001 Date: YW Operator: 19-Mar-12
Purpose: Split flowsheet , Finer primary grind
Procedure: As below.
Feed: 2 kg of -10 mesh Master Composite
Grind: 73 minutes/2 kg at 65% solids in a lab mill
Regrind 2 minutes in the pebble mill
Feed K80 : 71 .. µm
Ni regrind K80: 43 µm
Conditions:
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX CuSO4 CMC Guar MIBC* Grind Cond. Froth pH Eh
Grind 73
Bulk Rougher 1 15 12 1 3 8.3 125.5
Bulk Rougher 2 20 6 1 3 8.3 27.2
Ni Scav 1 30 20 20 1 4 8.3 23.0
Ni Scav 2 30 1 4 8.2 -39.1
Ni Scav 3 30 1 4 8.2 -67.1
Combine Ro Conc 1-2
Bulk 1st Cleaner A 12 12 2 8.3 55.1
B 10 2
Bulk 2nd Cleaner A 7 7 2
B 5 2
Combine Scav Conc 1-3
Ni 1st Cleaner A 20 15 15 10 1 3 8.4 19.1
B 10 5 1 3 8.2 -33.1
Regrind (PM) 2
Ni 2nd Cleaner 5 2+2 2+2 1 2+2
Total 0 175 0 54 54 33 75 8
*As needed
32
Stage
Roughers 1stClnr and Scav. 2nd, 3rd Cleaner
Flotation Cell 1000g-D12 500-g D12 250-g D12
PSA on Ni Scav tails
Speed: rpm 1800
1600 1100
PSA On Ni Regrind
Assay only Cu, Ni, S
Metallurgical Balance
Product
Weight
Assays, % % Distribution
g % Cu Ni S Cu Ni S
Bulk 2nd Clnr Conc. 63.1 3.20 11.2 8.26 25.8 86.6 52.0 24.1
Bulk 2nd Clnr Tail 47.4 2.40 0.42 3.02 9.43 2.4 14.3 6.6
Bulk 1st Clnr Tail 98.2 4.98 0.14 0.66 5.10 1.7 6.5 7.4
Ni 2nd Clnr Conc 12.1 0.61 0.91 1.66 25.9 1.3 2.0 4.6
Ni 2nd Clnr Tail 33.7 1.71 0.16 0.70 17.8 0.7 2.4 8.9
Ni 1st Clnr Tail 92.9 4.71 0.11 0.38 6.82 1.3 3.5 9.4
Ni Scav Tail 1625 82.4 0.03 0.12 1.62 6.0 19.4 39.0
Head (calc.) 1972 100.0 0.41 0.51 3.43 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 2nd Clnr Conc 63.1 3.20 11.2 8.26 25.8 86.6 52.0 24.1
Bulk 1st Clnr Conc 111 5.60 6.58 6.01 18.8 89.1 66.2 30.7
Bulk Rougher Conc 209 10.6 3.55 3.49 12.3 90.8 72.7 38.1
Ni 2nd Clnr Conc 12.1 0.61 0.91 1.66 25.9 1.3 2.0 4.6
Ni 1st Clnr Conc 45.8 2.32 0.36 0.95 19.9 2.0 4.4 13.5
Ni Scav Conc 139 7.03 0.19 0.57 11.2 3.3 7.9 22.9
Bulk Rghr+Scav Conc 347 17.6 2.21 2.33 11.9 94.0 80.6 61.0
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. 63.1 3.20 11.2 8.26 25.8 54.7 32.4 23.4 17.8 26.4 86.6 52.0 24.1 86.6 56.8 8.4 0.93
Bulk 2nd Clnr Tail 47.4 2.40 0.42 3.02 9.43 87.1 1.2 8.4 16.4 74.0 2.4 14.3 6.6 2.4 15.3 5.8 1.96
Bulk 1st Clnr Tail 98 4.98 0.14 0.66 5.10 94.1 0.4 1.7 11.6 86.3 1.7 6.5 7.4 1.7 6.4 8.5 4.7
Ni 2nd Clnr Conc 12.1 0.61 0.91 1.66 25.9 71.5 2.6 4.0 62.3 31.0 1.3 2.0 4.6 1.3 1.9 5.6 0.2
Ni 2nd Clnr Tail 33.7 1.71 0.16 0.70 17.8 81.3 0.5 1.4 45.2 52.8 0.7 2.4 8.9 0.7 1.9 11.4 1.0
Ni 1st Clnr Tail 93 4.71 0.11 0.38 6.82 92.7 0.3 0.8 16.9 81.9 1.3 3.5 9.4 1.3 3.0 11.8 4.3
Ni Scav Tail 1625 82.4 0.03 0.12 1.62 98.2 0.1 0.2 4.0 95.7 6.0 19.4 39.0 6.0 14.7 48.5 86.9
Head (calc.) 1972 100.0 0.41 0.51 3.43 95.7 1.20 1.32 6.77 90.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0
(direct)
Combined Products
0.33 0.42 2.53
Bulk 2nd Clnr Conc 63 3.20 11.20 8.26 25.8 54.7 32.4 23.4 17.8 26.4 86.6 52.0 24.1 86.6 56.8 8.4 0.9
Bulk 1st Clnr Conc 111 5.60 6.58 6.01 18.8 68.6 19.0 17.0 17.2 46.8 89.1 66.2 30.7 89.1 72.2 14.2 2.9
Bulk Rougher Conc 209 10.6 3.55 3.49 12.3 80.6 10.3 9.8 14.5 65.4 90.8 72.7 38.1 90.8 78.6 22.7 7.6
Ni 2nd Clnr Conc 12 0.61 0.91 1.66 25.9 71.5 2.63 4.01 62.3 31.0 1.3 2.0 4.6 1.3 1.9 5.6 0.2
Ni 1st Clnr Conc 46 2.32 0.36 0.95 19.9 78.7 1.04 2.13 49.7 47.1 2.0 4.4 13.5 2.0 3.8 17.0 1.2
Ni Scav Conc 139 7.03 0.19 0.57 11.2 88.1 0.55 1.26 27.7 70.4 3.3 7.9 22.9 3.3 6.8 28.8 5.5
Bulk Rghr+Scav Conc 347 17.6 2.21 2.33 11.9 83.6 6.38 6.38 19.8 67.4 94.0 80.6 61.0 94.0 85.3 51.5 13.1