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Test: F32 Project: 11603-005 50149-001 Date: 09-Feb-12 Operator: YW
Purpose: Split flowsheet including Cu separation
Procedure: As below.
Feed: 2x2 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 (bulk clnr 1 concentrate)
Regrind 8 minutes in the pebble mill (Ni clnr 1 concentrate) Feed K80 : 90 µm
Cu regrind K80: 44 µm
Conditions: Ni regrind K80: 53 µm
Reagents added, grams per tonne Time, minutes
Stage Lime SIPX 4037 CMC MIBC* Grind Cond. Froth pH Eh
Grind 57
Bulk Rougher 1 10 40 24 1 2 8.5 150.7
Bulk Rougher 2 5 40 1 2 8.5 97.8
Ni Scav 1 30 40 10 6
Ni Scav 2 30+30 40 CuSO4: 200 g/t 12 6+2 8.5 100.0
Combine Ro Conc 1-2
Bulk 1st Cleaner 0+2 15+0 3+1 8.6 115.4
Regrind (PM) 4
Bulk 2nd Cleaner 0+2+2 Guar gum: 10 g/t 8.2 97.8
Condition 700 5 11.3 -31.9
Cu Rougher 5100: 1.25 g/t 4+4 2 11.1 -16.3
Cu 1st Cleaner 116.5 1
Combine Scav Conc 1-2
Ni 1st Cleaner 20+10 30 4+2 8.7 64.3
Regrind (PM) Guar Gum 8
Ni 2nd Cleaner 5 10 3+2 8.4 113.2
Ni 3rd Cleaner 10 2
Total 816.5 50 0 190 20 46 69 7 15
*As needed
Stage Rougher 2nd clnr 3rd clnr & sep
Flotation Cell 2000 g D-12 500 g D-12 250 g D-12 PSA On Bulk Regrind
Speed: r.p.m. 1500 1600 1200 PSA On Ni Regrind
Metallurgical Balance
Product
Weight
Assays, (Pt, Pd, Au g/t), (Cu, Ni, S, Fe, MgO %)
% Distribution
g % Cu Ni Pt Pd Au S Fe MgO Cu Ni Pt Pd Au S Fe MgO
Cu 1st Cl Conc 14.3 0.36 30.3 0.47 1.71 6.17 1.27 30.1 31.5 1.15 37.6 0.4 1.6 5.0 11.5 4.6 0.9 0.02
Cu 1st Cl Tail 3.5 0.09 20.3 2.80 3.47 19.0 1.69 27.3 31.8 3.43 6.2 0.6 0.8 3.7 3.7 1.0 0.2 0.01
Cu Ro Tail 14.0 0.35 9.65 14.0 3.10 21.1 0.84 26.6 30.2 4.37 11.7 11.8 2.9 16.6 7.4 4.0 0.9 0.1
Bulk 2nd Clnr Tail 31.4 0.79 3.16 6.23 2.08 7.82 0.23 13.2 20.3 16.2 8.6 11.8 4.3 13.8 4.6 4.5 1.3 0.5
Bulk 1st Clnr Tail 59.7 1.51 0.14 0.43 0.53 0.44 0.03 2.05 10.0 26.4 0.7 1.6 2.1 1.5 1.1 1.3 1.2 1.6
Ni 3rd Clnr Conc 47.6 1.20 3.14 9.32 7.10 7.80 0.44 30.5 44.1 2.2 13.0 26.8 22.3 20.9 13.2 15.6 4.3 0.1
Ni 3rd Clnr Tail 50.3 1.27 0.47 2.87 3.19 1.92 0.17 17.1 29.6 14.7 2.1 8.7 10.6 5.4 5.4 9.3 3.1 0.8
Ni 2nd Clnr Tail 80.0 2.02 0.26 1.37 1.40 0.94 0.09 13.6 24.8 16.0 1.8 6.6 7.4 4.2 4.6 11.7 4.1 1.3
Ni 1st Clnr Tail 171 4.32 0.18 0.41 0.80 0.54 0.04 3.40 13.3 25.0 2.7 4.2 9.0 5.2 4.3 6.3 4.7 4.4
Ni Scav Tail 3490 88.1 0.05 0.13 0.17 0.12