NI43-101Pre-Feasibility Study Report - page 19

Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
iv
11.6.9
2009-2013 Pulp (Analytical) Duplicates ......................................................................... 11-17
11.6.10Duplicates Quality Control Graphs................................................................................. 11-18
11.6.112010-2013 Check Analysis Programs............................................................................ 11-20
11.6.12Check Analysis Program Quality Control Graph............................................................ 11-21
11.6.132009-2013 QA/QC Conclusions..................................................................................... 11-22
11.7
Security .......................................................................................................................... 11-22
12 Data Verification......................................................................................................12-1
12.1 Introduction....................................................................................................................... 12-1
12.2 General............................................................................................................................. 12-1
13
Mineral Processing and Metallurgical Testing ......................................................13-1
13.1
Historical Test-work.......................................................................................................... 13-1
13.2
Rare-Earth Metallurgical Testing...................................................................................... 13-1
13.3
Summary of Process Design Criteria ............................................................................... 13-2
13.3.1
Process Description ......................................................................................................... 13-2
13.3.2
Crushing and Screening................................................................................................... 13-2
13.3.3
PUG Plant ........................................................................................................................ 13-2
13.3.4
Acid Digestion, Rare Earths and Base Metal Separation ................................................ 13-2
13.3.5
Acid and Water Recovery ................................................................................................ 13-3
13.3.6
Neutralization and Base Metal Recovery......................................................................... 13-3
13.4
Overall Rare Earth Recovery Used in Economic Evaluation ........................................... 13-3
13.4.1
Screening and PUG Recovery ......................................................................................... 13-3
13.4.2
Hydrometallurgical Recovery ........................................................................................... 13-4
13.4.3
Waste Streams................................................................................................................. 13-6
13.5
Mineral Processing – Batch Tests.................................................................................... 13-7
13.5.1
Variability Tests ................................................................................................................ 13-7
13.5.2
Magnetic Tests ............................................................................................................... 13-14
13.5.3
Gravity Tests .................................................................................................................. 13-15
13.6
Mineral Processing – Pilot Tests.................................................................................... 13-16
13.6.1
Pilot PUG Composites ................................................................................................... 13-16
13.6.2
Pilot PUG Test on COMP 1A ......................................................................................... 13-18
13.6.3
Pilot PUG Test on COMP 2............................................................................................ 13-20
13.6.4
Pilot PUG Test on COMP 3............................................................................................ 13-22
13.6.5
Material Handling Testing .............................................................................................. 13-25
13.6.6
SGS – Hydromet Plant Testing ...................................................................................... 13-26
13.6.7
Precipitation Testing....................................................................................................... 13-37
13.7
Conversion of Rare Earth Oxalates ............................................................................... 13-43
13.8
Acid/Water Recovery ..................................................................................................... 13-43
13.9
Thorium Removal ........................................................................................................... 13-49
1...,9,10,11,12,13,14,15,16,17,18 20,21,22,23,24,25,26,27,28,29,...587
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