Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
13-16
Table 13.10 - Gravity Separation Testing, Whitetail
(SGS Lakefield, 2013)
13.6 Mineral Processing – Pilot Tests
13.6.1 Pilot PUG Composites
Eight (8) drill core samples were shipped to SGS-Lakefield for pilot testing and then
combined into four composites of which three (Comp 1A, Comp 2 and Comp 4) were
from the Bull Hill deposit and one (Comp 3) was from the Whitetail deposit. The
purpose of the preliminary pilot tests of July 2013 was to confirm the beneficiation
flowsheet (Bull Hill oxides, Bull Hill OxCa and WT Ox/OxCa). After a thorough study
of solids behavior under gravity and magnetic forces, PUG flowsheets for BH and WT
deposits were designed. Subsequently, the flowsheets were applied to ores that
represent the mineral resource according to the mine development plan.
These samples were prepared and composited per RER instructions. These data are
illustrated in Table 13.11.
Whitetail Deposit (Wifley Table Batch Results)
WF Comp -1+0.425MMWet Table -20+32mesh
PRODUCT
YIELD Au
Si02 Fe203 TREO+Y203
WET TABLE
% ppb
dist.
% dist.
% dist.
% dist.
SUPERCONCENTRATE 1.45% 740
3.00% 8.68 0.33% 31.47 1.99% 7.82 4.54%
CONCENTRATE
11.79% 979 32.26% 18.63 5.68% 33.37 17.12% 5.57 26.29%
MIDDLINGS
73.94% 290 59.91% 40.65 77.66% 22.49 72.31% 2.16 63.85%
TAILINGS
12.81% 135
4.83% 49.36 16.34% 15.42 8.59% 1.04 5.31%
Calculated Head
100.00% 358 100.00% 38.71 100.00% 23 100.00% 2.5 100.00%
Superconcentrate + Concentrate =Mass pull (13.25 wt.%)
Recovery of TREO+Y203 to total concentrate = 30.84%
Concentrate grade = 5.81%
Head grade = 2.50%
Upgrade factor = 2.33
