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

Prophecy Platinum Corporation – Wellgreen Property – Project 50149-001
Table 18: Test F-39 Results Using MF2 Flowsheet
Product Weight Assays, % % Distribution
% Cu Ni S Cu Ni S
Prim Clnr 2 Conc 1.0 15.5 7.28 29.7 40.9 14.9 8.57
Prim Clnr 1 Conc 1.3 11.6 7.95 28.1 42.9 22.8 11.4
Prim Rougher Conc 4.8 3.75 4.56 16.1 49.1 46.4 23.1
Sec Clnr 2 Conc 2.6 5.31 4.20 20.7 37.6 23.1 16.1
Sec Clnr 1 Conc 4.5 3.19 2.82 16.4 39.8 27.3 22.5
Sec Scav Conc 9.9 1.53 1.51 11.1 41.5 31.8 33.0
Regrind Scav Conc 0.2 0.65 0.98 7.80 0.38 0.45 0.50
Regrind Scav Feed 5.3 0.11 0.39 6.55 1.65 4.50 10.5
Regrind Scav Tail 5.1 0.09 0.37 6.50 1.27 4.05 10.0
Sec Scav Tail 85.3 0.04 0.12 1.71 9.38 21.8 43.9
Comb Clnr Conc 3.5 8.07 5.04 23.1 78.5 38.0 24.6
Comb Ro & Scav Conc 14.7 2.25 2.50 12.7 90.6 78.2 56.1
4.2.3. Locked Cycle Tests – Split Stream
Locked cycle testing helps to establish plant predicted grade-recovery relationships since it includes
circulating loads in a simulated continuous environment. Based on the results and analysis of
metallurgical performance from the split flowsheet batch tests three locked cycle tests, LCT-1, LCT-3, and
LCT-5 were conducted using this flowsheet (Figure 26) by re-circulating the intermediate products.
LCT-1 was conducted with Cu-Ni separation on the last three cycles. In this test 4-kg charges were used
for each cycle. A copper concentrate with a grade of 23% Cu at a recovery of 68% was achieved in this
test. The Fe/MgO ratio and MgO content of the final concentrate were within the accepted limits in this
test.
Table 19 presents the locked cycle test (LCT-1) results, and detailed results are presented in Appendix F.
Table 19: LCT-1 Test Results
LCT-1 Weight
Assays % Distribution
Product % Cu Ni S Pt Pd Au Rh Ru Ir Os Co Fe MgO Cu Ni S Fe MgO
% % % g/t g/t g/t ppb ppb ppb ppb % % %
Cu Conc 1.00 23.2 0.88 28.3 2.16 4.83 1.44 177 192 150 140 0.045 28.5 2.83 68.2 1.8 9.5 2.3 0.1
Cu Rougher Tail (Ni Conc.) 1.78 2.55 14.4 26.7 3.34 10.9 0.32 323 455 329 270 0.870 32.5 4.55 13.4 53.9 16.1 4.7 0.4
Ni 3rd Clnr Conc 0.48 3.24 7.03 27.2 5.72 5.9 0.43 311 430 338 290 0.360 41.8 5.04 4.6 7.0 4.4 1.6 0.1
Ni 1st Clnr Tail 15.0 0.13 0.48 7.48 1.02 0.61 0.05 90 112 106 72 0.023 18.5 20.4 5.8 15.0 38.0 22.5 13.5
Ni Scav Tail 81.7 0.03 0.13 1.15 0.22 0.09 0.02