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

Prophecy Platinum Corporation – Wellgreen Property – Project 50149-001
make concentrate by keeping the cleaner scavenger. Table 14 presents the locked cycle test (LCT-2)
results, and detailed results are attached in the Appendix F.
The calculated mass balances and LCT stability are presented in Appendix F. It should be noted that the
mass balance is calculated from the locked cycle test end cycle products (last three cycles) along with the
projected concentrate grades and recoveries. Cycle test stability is measured by comparing the mass and
metal units into and out of the circuit from each cycle. Figure 25 shows LCT-2 circuit stability.
Table 14: Locked Cycle Test 2 Results
Product
Weight
%
Assays, (Pt, Pd, Au g/t), (Cu, Ni, Fe, MgO %)
Cu Ni S Pt Pd Au Fe Mgo Cu Ni
% Distribution
S Pt Pd Au
3rd Clnr Concentrate 4.36 6.99 7.13 19.4 2.44 6.80 0.54 25.4 9.82 84.9 63.4 29.2 26.4 64.4 62.9
Cleaner Tail 12.8 0.11 0.44 3.59 0.70 0.41 0.03 ─ ─ 3.9 11.3 15.8 22.2 11.5 9.3
Rougher Tail 82.9 0.05 0.15 1.93 0.25 0.13 0.01 ─ ─ 11.2 25.3 55.0 51.4 24.1 27.8
1st Cleaner Regrind Conc F 0.23 0.51 1.40 4.55 2.17 1.73 0.20 ─ ─ 0.3 0.7 0.4 1.2 0.9 1.2
Magnetic Conc F 0.32 0.28 0.45 3.33 1.40 1.38 0.21 ─ ─ 0.2 0.3 0.4 1.1 1.0 1.8
Head (calc.) 100.0 0.36 0.49 2.90 0.40 0.46 0.04 ─ ─ 100.0 100.0 100.0 100.0 100.0 100.0
(direct) 0.33 0.42 2.53 0.41 0.45 0.04 11.9 22.8
%
140
120
100
80
60
40
20
0
LCT-2 Circuit Stability
1 2 3 4 5 6
Figure 25: Locked Cycle Test 2 Circuit Stability
Test F-40 to some extent suggested a lot of the PGE is with pyrrhotite and/ or magnetite. A small test was
added to the LCT-2 by conducting a magnetic separation on the cycle F rougher tail. The magnetic
concentrate was reground for 20 minutes with 20 g/t Aero 4037 and then floated for recovery of Cu, Ni,
and PGE.
Also in this the 1 st cleaner tail F was reground for 20 minutes with Aero 4037 and floated for recovery of
Cu, Ni, and PGE. The added reground and magnetic separations were promising in this test. The results
are presented in Appendix F.
Based on the test LCT-2, a 14% Cu+Ni concentrate grade was achieved; the Cu and Ni recoveries were
85% and 63%, respectively. The combined Au, Pt, and Pd grade of this test was 10 g/t. The Pt, Pd and
SGS Minerals Services
Wt %
Cu
Ni
S
Pt
Pd
Au
39