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Test No.: NHI-F2 Project No.: 50149-001 Operator: YW Date: Jan 6 2012
Purpose: Cleaner flotation test, based on Master Composite flotation test F12
Procedure: As outlined below.
Feed: 2 kg of minus 10 mesh of High Ni Composite
Grind:
Regrind:
57 minutes / 2 kg @ 65% solids in laboratory Ball Mill
K80: 103 µm
Conditions: Clnr K80: 58 µm
Reagents added, g/t Time, minutes
Stage Lime SIPX MIBC* CMC DF250 PAX 3477 Grind Cond. Froth pH Eh
Grind 5 57
Condition 1
Rougher 1 10 1 2 8.7 34.5
Rougher 2 5 5 1 2 8.6 30.8
Rougher 3 10 5 1 4 8.6 9.3
Rougher 4 20 5 1 6 8.5 -3.0
Regrind (PM) 0
1st Cleaner 5 75 1 8 8.5 75.9
1st Cleaner Scav 10 1 3 8.3 13.5
2nd Cleaner 5 75 1 7 8.5 41.1
3rd Cleaner 5 50 1 6 8.4 50.0
Total 0 55 35 200 0 57 9
* As required
38 . .
Stage
Roughers 1stClnr and Scav. 2nd, 3rd Cleaner
Flotation Cell 1000g-D12 500-g D12 250-g D12
Speed: rpm 1800
1600
1100
PSA on rougher tail
Extra assay:Ro Tails assay for Ni(s)
Metallurgical Balance
Product
Weight
g % Cu
Assays, (Pt, Pd, Au g/t), (Cu, Ni, Fe, MgO %)
Ni S Pt Pd Au Fe MgO Cu Ni S
% Distribution
Pt Pd Au Fe MgO
3rd Clnr Conc 134.4 6.8 6.53 8.21 25.0 2.53 5.54 0.68 36.0 3.02 85.2 66.5 27.1 29.1 65.6 61.5 13.4 1.0
3rd Clnr Tls 67.1 3.4 0.56 2.28 21.1 2.03 1.47 0.17 37.8 9.51 3.6 9.2 11.4 11.6 8.7 7.7 7.0 1.5
2nd Clnr Tls 108.3 5.5 0.16 0.69 12.2 1.00 0.41 0.09 26.0 18.5 1.7 4.5 10.6 9 3.9 6.6 7.8 4.9
1st Clnr Scv Conc 25.7 1.3 0.16 0.69 14.7 1.27 0.46 0.08 32.6 14.6 0.4 1.1 3.0 2.8 1.0 1.4 2.3 0.9
1st Clnr Scv Tls 103.7 5.2 0.07 0.33 5.88 0.58 0.20 0.03 18.3 21.0 0.7 2.1 4.9 5.1 1.8 2.1 5.2 5.3
Rougher Tails 1539 77.8 0.06 0.18 3.46 0.32 0.14 0.02 15.1 23.2 8.4 16.7 42.9 42.1 19.0 20.7 64.3 86.4
Ni(S)= 0.11
Head (calc.) 1978 100 0.52 0.84 6.27 0.59 0.57 0.08 18.3 20.9 100 100 100 100 100 100 100 100
(direct) 0.52 0.83 6.45 0.57 0.61 0.10 18.1 19.8
Combined Products
Product
Weight
g % Cu Ni
Assays, (Pt, Pd, Au g/t), (Cu, Ni %)
S Pt Pd Au Fe MgO Cu Ni S
% Distribution
Pt Pd Au Fe MgO
3rd Clnr Conc 134.4 6.79 6.53 8.21 25.0 2.53 5.5 0.68 36.0 3.02 85.2 66.5 27.1 29.1 65.6 61.5 13.4 1.0
2nd Clnr Conc 201.5 10.2 4.54 6.24 23.7 2.36 4.18 0.51 36.6 5.18 88.9 75.7 38.5 40.7 74.2 69.2 20.4 2.5
1st Clnr Conc 309.8 15.7 3.01 4.30 19.7 1.89 2.87 0.36 32.9 9.84 90.6 80.2 49.1 50.0 78.2 75.8 28.2 7.4
1st Cl & ClScv Conc 335.5 17.0 2.79 4.02 19.3 1.84 2.68 0.34 32.9 10.2 91.0 81.3 52.2 52.8 79.2 77.2 30.5 8.3
Rghr Conc 439.2 22.2 2.15 3.15 16.1 1.54 2.10 0.27 29.4 12.8 91.6 83.3 57.1 57.9 81.0 79.3 35.7 13.6
Cleaner Circuit Mass rec Upgrade
Unit Recovery
Unit Performance 31% 3.04 2.61 1.55 1.64 2.64 2.54 1.22 0.24 94% 82% 56% 59% 83% 80% 52% 46%
Product Weight
Assays, % % Distribution
g % Cp Pn Po Gangue Cp Pn Po Gangue
3rd Cleaner Conc 134.4 6.8 18.9 23.1 28.3 29.7 85.2 69.9 14.6 2.4
3rd Cleaner Tail 67.1 3.4 1.62 5.96 48.9 43.6 3.6 9.0 12.6 1.8
2nd Cleaner Tail 108.3 5.5 0.46 1.63 30.3 67.6 1.7 4.0 12.6 4.5
1st Cleaner Scav Conc 25.7 1.3 0.46 1.55 36.9 61.1 0.4 0.9 3.6 1.0
1st Cleaner Scav Tail 103.7 5.2 0.19 0.78 14.6 84.4 0.7 1.8 5.8 5.3
Rougher Tail 1539 77.8 0.16 0.42 8.59 90.8 8.4 14.4 50.8 85.1
Head (calc.) 1978.4 100 1.51 2.25 13.2 83.1 100 100 100 100
Combined Products Cu+Ni PGE
3rd Cleaner Conc 6.8 18.9 23.1 28.3 29.7 85.2 69.9 14.6 2.4 14.7 8.8
2nd Cleaner Conc 10.2 13.2 17.4 35.1 34.3 88.9 78.9 27.2 4.2 10.8 7.1
1st Cleaner Conc 15.7 8.72 11.89 33.4 46.0 90.6 82.9 39.8 8.7 7.3 5.1
1st Cl + Sc Conc 17.0 8.09 11.10 33.7 47.1 91.0 83.8 43.4 9.6 6.8 4.9
Rougher Conc 22.2 6.23 8.66 29.2 55.9 91.6 85.6 49.2 14.9 5.3 3.9
Rougher Tail' 77.8 0.16 0.42 8.59 90.8 8.4 14.4 50.8 85.1