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Prophecy Platinum Corporation – Wellgreen Property – Project 50149-001
Table 16; Split Flowsheet Cleaner Test Results (Continued)
Test Product Weight
Assays, % % Distribution
% Cu Ni Pt Pd Au S Fe MgO Cu Ni Pt Pd Au S Fe MgO
F32 Cu 1st Clnr Conc 0.4 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
4Kg Cu Rougher Conc 0.4 28.3 0.93 2.06 8.69 1.353 29.5 31.6 1.60 43.7 1.0 2.4 8.71 15.2 5.7 1.2 0.03
Bulk 2nd Clnr Conc 0.8 20.1 6.68 2.52 14.2 1.127 28.3 31.0 2.82 55.5 12.8 5.3 25.3 22.7 9.67 2.0 0.09
Bulk Rougher Conc 3.1 6.08 3.53 1.44 5.87 0.365 11.7 18.1 17.7 64.8 26.2 11.7 40.6 28.4 15.4 4.5 2.22
Ni 3rd Clnr Conc 1.2 3.14 9.32 7.10 7.80 0.44 30.5 44.1 2.24 13.0 26.8 22.3 20.9 13.2 15.6 4.3 0.11
Ni Scav Conc 8.8 0.64 2.20 2.14 1.82 0.125 11.4 22.5 18.3 19.5 46.4 49.2 35.8 27.5 42.9 16.1 6.54
Ni Scav Tail 88.1 0.05 0.13 0.17 0.12 0.02 1.11 11.1 25.6 15.7 27.4 39.1 23.6 44.1 41.7 79.4 91.2
Head (calc.) 0.29 0.42 0.38 0.45 0.04 2.35 12.3 24.7
F34 Bulk 3rd Clnr Conc 0.82 23.2 3.65 2.51 12.0 1.41 29.2 30.2 2.3 60.4 6.8 4.7 20.3 25.2 8.9 1.9 0.08
4Kg Bulk Rougher Conc 5.42 4.60 4.44 1.96 5.25 0.36 12.5 19.7 16.1 79.6 55.2 24.5 58.9 42.4 25.3 8.4 3.87
Ni 2nd Clnr Conc 0.41 3.11 7.05 9.33 7.69 1.12 29.6 42.3 3.7 4.0 6.6 8.8 6.5 10.0 4.5 1.36 0.07
Ni Scav Conc 5.85 0.42 1.22 1.95 1.27 0.15 9.86 21.0 18.4 7.9 16.3 26.4 15.3 18.7 21.5 9.7 4.78
Ni Scav Tail 88.7 0.04 0.14 0.24 0.14 0.02 1.61 11.7 23.2 12.5 28.5 49.1 25.7 38.9 53.2 81.9 91.4
Head (calc.) 0.31 0.44 0.43 0.48 0.05 2.68 12.7 22.5
F35 Bulk 3rd Clnr Conc 1.26 18.5 7.53 3.10 15.5 1.57 30.3 31.3 2.11 70.2 21.6 8.8 34.9 37.7 13.2 3.0 0.1
4Kg Bulk Rougher Conc 5.93 4.66 4.49 2.17 5.41 0.43 14.0 20.9 15.9 82.9 60.5 28.8 57.2 48.6 28.5 9.5 4.0
Ni 3rd Clnr Conc 0.31 3.00 4.13 5.51 6.00 1.60 32.9 48.0 2.32 2.8 2.9 3.8 3.3 9.4 3.5 1.1 0.0
Ni Scav Conc 5.49 0.42 1.07 1.91 1.15 0.17 11.5 23.8 17.7 7.0 13.3 23.5 11.3 17.8 21.8 10.1 4.2
Ni Scav Tail 88.6 0.04 0.13 0.24 0.20 0.02 1.6 11.8 24.2 10.1 26.2 47.7 31.5 33.6 49.7 80.4 91.8
Head (calc.) 0.33 0.44 0.45 0.56 0.05 2.9 13.0 23.3
F36 Bulk 2nd Clnr Conc 3.22 8.85 8.94 2.22 6.79 0.72 26.6 32.1 4.8 80.1 59.3 20.9 55.3 29.6 28.7 8.4 0.7
4Kg Bulk Rougher Conc 7.60 3.88 4.29 1.54 3.40 0.36 13.9 20.7 14.9 83.0 67.2 34.3 65.2 34.8 35.3 12.7 5.2
Ni 3rd Clnr Conc 2.83 0.41 1.32 1.30 0.78 0.17 30.8 47.3 5.2 3.3 7.7 10.8 5.6 6.1 29.2 10.8 0.7
Ni Scav Conc 10.2 0.27 0.67 0.99 0.56 0.11 14.2 27.2 15.4 7.8 14.1 29.6 14.4 14.8 48.4 22.4 7.2
Ni Scav Tail 82.2 0.04 0.11 0.15 0.10 0.05 0.6 9.8 23.2 9.2 18.6 36.1 20.4 50.4 16.2 64.9 87.6
Head (calc.) 0.36 0.49 0.34 0.40 0.08 3.0 12.4 21.8
F37 Bulk 2nd Clnr Conc 3.01 10.8 8.56 1.88 6.27 0.94 29.2 30.9 4.3 81.5 53.3 13.9 51.7 11.9 24.2 7.3 0.6
4Kg Bulk Rougher Conc 7.97 4.22 3.85 1.35 2.98 0.45 14.3 19.3 15.3 84.2 63.3 26.5 65.1 15.2 31.3 12.0 5.8
Ni 3rd Clnr Conc 3.46 0.44 1.69 3.02 0.31 0.37 32.1 46.7 5.4 3.8 12.1 25.7 2.9 5.3 30.5 12.6 0.9
Ni Scav Conc 9.35 0.32 0.92 1.61 0.40 0.23 18.4 30.6 13.2 7.5 17.9 37.0 10.3 9.1 47.3 22.3 5.9
Ni Scav Tail 82.7 0.04 0.11 0.18 0.11 0.02 0.9 10.2 22.4 8.3 18.8 36.5 24.7 19.5 21.4 65.7 88.3
Head (calc.) 0.40 0.48 0.41 0.37 0.07 3.6 12.8 21.0
4.2.2. MF2 Flowsheet
Tests F-33 and F-39 were conducted using grind-float-grind-float philosophy (An MF2 style flowsheet).
This type of flowsheet has been successfully used in the South African platinum industry to deal with
bimodal distributions of PGM. Coarse minerals were recovered before regrinding the tails to liberate very
fine material. MF2 flowsheet is shown in Figure 27 and the results are presented in Tables 17 and 18.
Detailed test results are presented in the Appendix F
Based on the test F-33, a 16.5% Cu+Ni concentrate grade was achieved; the Cu and Ni recoveries were
67% and 25%, respectively. The combined Au, Pt, and Pd grade of this test was 14.5 g/t. The Pt, Pd and
Au recoveries were 16%, 36% and 37%, respectively.
As for the test F-39, a 13% Cu+Ni concentrate grade was achieved; the Cu and Ni recoveries were 79%
and 38%, respectively. The MF2 tests did not show much promise but there are merits to including flash
flotation as this will recover easy to float liberated Cu/Ni from a de-slimed feed. It is difficult to test the lash
flotation in the lab.
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