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

Mining will be done by conventional open pit methods at a rate of 32,000 t/d of
mineralized material resulting in the 37-year LOM.
25.3 M INERAL P ROCESSING
The current proposal under consideration for Wellgreen includes a 32,000 t/d
conventional crushing and grinding circuit comprising a jaw crusher and SAG mill
combination followed by a MF2 type process, in order to produce a bulk nickelcopper
concentrate for sale and treatment off site. Although developed primarily for
UG2 mineralized material, the MF2 configuration offers certain advantages such as
prevention of over-grinding and slimes generation, increased rejection of talc, chlorite
and pyrrhotite and early recovery of PGM. The concept is to gradually reduce the
size of the mineralized material particles, and float the liberated material immediately
after each size reduction. Secondary grinding will be by ball mills and tertiary
grinding by vertimills. The process will comprise two trains, identical from crushing
through to the concentrate and tailings thickeners. The concentrate will be
thickened, filtered, and loaded on trucks to be transported for further processing offsite
(e.g. sale or toll smelting). The tailings will be thickened and pumped to the
TMF.
For the purpose of the current study, laboratory test work estimated flotation
concentrate grade and average process recovery data drawn from the industry have
been used and are summarized in the Table 25.3.
Table 25.3 Summary Grade and Recovery Data
Metal
Flotation
Concentrate
Grade
Flotation
Concentrate
Recovery
(%)
Nickel 5.7% 67.6
Copper 6.0% 87.8
Cobalt 0.6% 64.4
Gold 0.48 g/t 58.9
Platinum 3.57 g/t 46.0
Palladium 6.22 g/t 72.9
The process capital and operating costs described in Section 17.0 are summarized in
Table 25.4 and Table 25.5.
Prophecy Platinum Corp. 25-3 1193460500-REP-R0001-02
Wellgreen Project Preliminary Economic Assessment,
Yukon, Canada