Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
13-22
13.6.4
Pilot PUG Test on COMP 3
The flowsheet for Whitetail ore consists of primary and secondary screening followed
by primary and secondary magnetic separation. This flowsheet is illustrated in Figure
13.7. A scavenger gravity separator is coupled to the primary magnetic separator.
Table 13.15 presents the recovery data for each of the streams in the flowsheet. The
overall recovery of REOs is 89.4% to 65.4% of mass. Again, the mass pull was on the
high side.
In the PFS, Whitetail ore is screened at 24 and 6 inch screens to reject low grade ore
before beneficiation. The mass pull was reduced significantly while recovery
remained almost constant (refer to whole ore screening data, SGS report 2014).
Table 13.15 - PUG Concentrates and Tailings
(SGS Lakefield, 2014)
Streams
Wt. (%) K80 (µm) Reconciled Grade , % or g/t
SiO2 AI2O3 Fe2O3 TREO1 CREO2
U
Th
PP Feed
100.0 2,053 39.9
11.8
12.4
2.40
0.71
82
779
150mesh U/S
14.4
66
29.7
9.25
19.7
4.97
1.54
136 1,816
Secondary 150mesh U/S 36.4
66
37.0
10.9
12.9
2.74
0.81
87
873
Primary Ro Conc
1.8
271
15.6
4.81
37.7
5.01
1.46
191 1,558
Primary Scav Conc
0.6
247
31.1
9.05
11.8
3.33
0.93
90
812
Secondary Ro Conc
12.1
297
25.9
7.59
24.0
2.80
0.73
132
705
Final PUG Conc
65.4
-
32.7
9.75
17.1
3.31
0.97
109 1,068
Primary Scav Tails
5.9
341
46.7
13.7
6.23
1.45
0.44
48
496
Secondary Scav Tails
28.7
418
54.9
15.9
2.89
0.53
0.17
26
177
Streams Reconciled Distribution, % or g/t
SiO2 AI2O3 Fe2O3 TREO1 CREO2
U
Th
PP Feed
100
100
100
100
100
100
100
150mesh U/S
10.8
11.4
22.9
29.8
31.1
24.1
33.7
Secondary 150mesh U/S 33.8
33.8
37.9
41.5
41.4
38.9
40.8
Primary Ro Conc
0.7
0.7
5.5
3.8
3.7
4.2
3.6
Primary Scav Conc
0.5
0.5
0.6
0.9
0.8
0.7
0.7
Secondary Ro Conc
7.9
7.8
23.5
14.1
12.4
19.6
11.0
Final PUG Conc
53.6
54.3
90.4
90.1
89.4
87.6
89.7
Primary Scav Tails
6.9
6.9
3.0
3.6
3.6
3.4
3.8
Secondary Scav Tails
39.5
38.8
6.7
6.4
7.0
9.0
6.5
1
TREO represents total rare earth oxides and includes Y
2
O
3
2
CREO represents the following rare earth oxides, as specified by RER: Pr
2
O
3
, Nd
2
O
3
, Dy
2
O
3
, Eu
2
O
3
, Tb
2
O
3
and Y
2
O
3
