Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
13-4
that is below economic grade. However, in subsequent years 10-45, recovery
includes screening and PUG plant efficiencies as shown in the Table 13.1 below.
Table 13.1 - REO Recoveries at PUG Plant in Years 1-9 and Years 10-45
REO RECOVERY BY SCREENING ONLY :
YEARS 1-9
Minerals
Screening
PUG
Overall
Ore Type
%REO
Rec
% Mass
Pull
%REO
Rec
% Mass
Pull %Rec
%Mass
Pull
BH HG
Ox
92
80
100
100
92
80
BH HG
OxCa
99
94.5
100
100
99
94.5
REO RECOVERY BY SCREENING + PUG:
YEARS 10 - 45
Minerals
Screening
PUG
Overall
Ore Type
%REO
Rec
% Mass
Pull
%REO
Rec
% Mass
Pull
%Rec
%Mass
Pull
BH MG Ox
95
80
91
77
88
55
BH MG OxCa
100
100
91
77
91
77
BH LG Ox
94
80
91
77
86
56
BH LG OxCa
100
100
91
77
91
77
WT
92
71
86
55.5
80
40
( SGS Lakefield, 2014)
13.4.2 Hydrometallurgical Recovery
The composite pre-concentrates from the PUG Plant will be acid leached to produce
a rare earth rich solution from which a +97%REE oxalate precipitate will be produced.
Hydrometallurgical recovery is a product of leach and oxalate precipitation
efficiencies with an additional 1%-2% loss in Thorium.
In this PFS, the mineral concentrates to Hydromet plant were composited by head
grade. The composite ores represent the mineral resources to be mined in specific
