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Prophecy Platinum Corporation – Wellgreen Property – Project 50149-001
Table 24: High Ni Composite Split Flowsheet Flotation Tests HNI-F3 & F4 Results
Test Product Weight
Assays, (Pt, Pd, Au g/t), (Cu, Ni, S %) % Distribution
% Cu Ni Pt Pd Au S Fe MgO Cu Ni Pt Pd Au S Fe MgO
Bulk 3rd Clnr Conc 3.1 10.3 11.0 2.32 8.11 0.94 28.8 33.9 1.82 67.6 41.8 12.6 44.9 40.2 13.9 5.9 0.3
Bulk 2nd Clnr Conc 4.2 7.95 10.3 2.18 6.68 0.74 27.6 34.1 3.32 70.1 52.6 15.9 49.7 42.5 17.9 7.9 0.7
Bulk 1st Clnr Conc 6.2 5.95 8.32 2.23 5.38 0.54 24.9 33.2 5.39 77.3 62.6 23.9 58.9 45.8 23.8 11.4 1.7
HNI-F3 Bulk Rougher Conc 10.6 3.64 5.65 1.93 3.58 0.36 21.0 31.4 9.06 81.0 72.8 35.5 67.1 51.8 34.4 18.4 5.0
4 kg Ni 3rd Clnr Conc 1.1 1.50 1.80 2.64 1.54 0.31 34.1 53.8 0.98 3.4 2.4 4.9 2.9 4.6 5.7 3.2 0.1
Ni 2nd Clnr Conc 1.9 1.06 1.63 2.36 1.24 0.23 32.1 52.1 2.17 4.3 3.8 7.8 4.2 6.0 9.4 5.5 0.2
Ni 1st Clnr Conc 4.2 0.67 1.26 1.91 0.92 0.16 28.7 46.9 4.08 6.0 6.5 14.1 6.9 9.6 18.8 11.0 0.9
Ni Scav Conc 9.5 0.46 0.92 1.55 0.77 0.12 18.7 34.2 11.1 9.2 10.6 25.6 13.0 15.3 27.5 18.1 5.5
Ni Scav Tail 79.9 0.06 0.17 0.28 0.14 0.03 3.08 14.3 21.4 9.8 16.6 38.9 19.9 32.9 38.1 63.5 89.5
Head (calc.) 0.47 0.82 0.58 0.56 0.07 6.46 18.0 19.1
Bulk 2nd Clnr Conc 4.0 9.68 9.07 2.35 7.46 0.81 28.0 35.3 2.51 77.0 43.3 17.3 52.1 32.9 16.6 7.7 0.5
HNI-F4 Bulk Rougher Conc 10.2 4.08 5.61 1.75 3.78 0.37 18.7 27.8 10.9 82.6 68.1 32.7 67.2 38.5 28.2 15.5 5.8
Ni 3rd Clnr Conc 1.6 1.62 2.80 3.15 2.00 1.46 30.2 47.2 4.31 5.1 5.2 9.1 5.5 23.3 7.0 4.1 0.4
Ni 2nd Clnr Conc 2.4 1.21 2.48 2.77 1.66 1.04 29.1 46.2 5.06 5.8 7.2 12.4 7.0 25.5 10.4 6.1 0.6
Ni 1st Clnr Conc 4.6 0.79 1.94 2.30 1.26 0.64 25.3 41.7 7.63 7.2 10.6 19.5 10.1 30.0 17.2 10.5 1.8
Ni Scav Conc 12.4 0.38 1.04 1.38 0.70 0.30 17.8 31.8 11.8 9.3 15.3 31.6 15.2 37.9 32.6 21.6 7.6
Ni Scav Tail 77.4 0.05 0.18 0.25 0.13 0.03 3.42 14.8 21.4 8.2 16.6 35.7 17.6 23.6 39.2 62.9 86.6
Head (calc.) 0.50 0.84 0.54 0.57 0.10 6.76 18.2 19.1
Test HNI-F5 was conducted with less SIPX in the scavenger and longer scavenger re-grind. While Ni
recovery improved in this test, Ni grade was lower.
Overall, the results for high Ni composite show the bulk circuit is pretty good without CMC/guar in
rougher. It seems more SIPX is needed in the bulk rougher 2 in order to get higher recovery. It is needed
to make better concentrate on Ni side. The issue is pyrrhotite flotation here. Copper sulphate was not
used for this composite. It is suggested to use less SIPX in scavenger and cleaner stages.
The results for this test are shown in Table 25 and are presented in detail in Appendix E.
Table 25: High Ni Composite Split Flotation Test HNI-F5 Results
Test Product Weight Assays, (Cu, Ni, S %) % Distribution
% Cu Ni S Cu Ni S
Bulk 2nd Clnr Conc 5.2 7.91 8.75 28.5 79.2 55.3 21.3
Bulk 1st Clnr Conc 7.6 5.44 6.28 24.7 80.3 58.5 27.3
HNI-F5 Bulk Rougher Conc 15.9 2.67 3.26 18.7 81.8 63.1 42.8
Ni 3rd Clnr Conc 0.8 4.04 3.73 24.0 5.9 3.4 2.6
Ni 2nd Clnr Conc 1.5 2.25 2.81 22.0 6.5 5.2 4.8
Ni 1st Clnr Conc 3.1 1.37 2.54 15.8 8.3 9.7 7.1
Ni Scav Conc 8.2 0.69 2.12 14.4 10.9 21.2 17.1
Ni Scav Tail 75.9 0.05 0.17 3.67 7.3 15.7 40.1
Head (calc.) 0.52 0.82 6.94
Finally, one locked cycle test (LCT-4) was conducted on High Ni Composite sample using the same test
conditions as master composite LCT-3. Reagents were adjusted accordingly and no CuSO4 was used in
this test.
The results for this test are shown in Table 26 and detailed test conditions and results are presented in
Appendix F.
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