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

Prophecy Platinum Corporation – Wellgreen Property – Project 50149-001
and nickel recoveries and enhance concentrate grade in the bulk concentrate, the effect of talc pre-
flotation and CMC as silicate depressant were examined. In one test talc was floated ahead of the bulk
copper and nickel flotation with frother. The results are shown in Figure 20.
Recovery, %
Recovery, %
100
80
60
40
20
Rougher Kinetics, Cu
0
0 2 4 6 8 10 12 14 16 18 20 22
100
80
60
40
20
Time, min
Rougher Kinetics, Pt
0
0 2 4 6 8 10 12 14 16 18 20 22
It can be concluded that:
Time, min
Recovery, %
100
80
60
40
20
Talc Pre-float
CMC
No CMC
Talc Pre-float
CMC
No CMC
Recovery, %
Recovery, %
100
80
60
40
20
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Rougher Kinetics, Ni
0
0 2 4 6 8 10 12 14 16 18 20 22
100
80
60
40
20
Rougher Kinetics, Au
0
0 2 4 6 8 10 12 14 16 18 20 22
Time, min
Time, min
Rougher Kinetics, Pd
0
0 2 4 6 8 10 12 14 16 18 20 22
Talc Pre-float
CMC
No CMC
Time, min
Figure 20: Effect of Talc Pre-flotation and CMC on Rougher Flotation
Talc pre-float
CMC
No CMC
Talc Pre-float
• Effect of CMC: CMC was applied to depress silicates. It was stage added to the first three
rougher stages at 60 g/t. CMC had minimal overall impact on Cu, Ni and PGM recoveries. The
slight increase in Au recovery is likely due to inherent process variation.
• Effect of talc pre-float: Before collection of a first rougher concentrate, talc was floated using the
addition of frother. It can be clearly observed in Table 8 that there was significant loss of Cu, Ni
and PGM in the talc pre-float concentrate.
CMC
No CMC
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