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

The graphs in Figure 13.1 illustrate the rougher flotation performance for nickel,
copper, platinum, and palladium. From the results of the three rougher tests it can
be seen that the reduction in grind size from 93 to 63 µm has little effect on the
recovery of nickel, copper, platinum, and palladium. An increase in the PAX dosage
also had little effect on the nickel, copper, and platinum recoveries, but it did appear
to have a larger effect on the palladium recovery.
Figure 13.1 Rougher Test Performance Graphs (G&T – 2011)
The graphs in Figure 13.2 illustrate the cleaner flotation performance. From the
results of these three tests it can be seen that the regrind after the rougher stage
(designated by “RG” in the figure) had little effect on the metal recoveries. The
reduction in the primary grind size also had little effect. The use of Calgon (sodium
hexametaphosphate) made a marked improvement in the metal recoveries. The
recoveries increased an average of 10%. The graph entitled “Comparison with other
Prophecy Platinum Corp. 13-6 1193460500-REP-R0001-02
Wellgreen Project Preliminary Economic Assessment,
Yukon, Canada