A copy of the presentation I gave at the AusIMM 2009 International Uranium Conference. It outlines some testing I conducted on a Brannerite ore to beneficiate it.

1. June 2009
AusIMM International
Uranium Conference
Amdel is a
member of the
Mineral Laboratories Bureau Veritas
Group

2. Contents
1. Disclaimers
2. Mineralogy – know your enemy
3. Heavy Liquid Separations
4. Spiralling
5. Flotation
6. Magnetic Separations
7. Summary

3. Beneficiation of Uranium Brannerite Ores
Acknowledgement and Disclaimer
• Thanks to our client who has kindly allowed me to release this
information.
• The client has requested their identity NOT be disclosed so as to
comply with ASX disclosure requirements. So any information that
could reveal this has been withheld.
• The information presented is based on lab scale testing and not plant
scale.
• No technicians were harmed in the production of these test results.
• Copious quantities of beer were consumed in the production of this
presentation and hence don’t believe anything you read.
• Further for those who DON’T ask any difficult questions, the beers are
on me at the bar at 5.30pm today.

4. Beneficiation of Uranium Brannerite Ores
Brannerite – an introduction
• (U4+,Ca)(Ti,Fe3+)2O6 complex
• Radioactive
• SG 4.2 - 5.4
• Refractory ore – more difficult to leach
• Paramagnetic
Courtesy: Mindat.org
In our case we have 5 bulk composites from different sections of the ore body.

5. Beneficiation of Uranium Brannerite Ores
Bulk Chemistry of our Samples
Indicative Head Grades – Fusion ICP (OES & MS)
CaO (1.5%)
U (100-395ppm)
TiO2 (0.5%) MnO (<0.01%)
P2O5 (0.8%)
Na2O (6.3%) Th (150-310ppm)
K2O (1.8%) Fe2O3 (1.5%)
MgO (1.8%)
Al2O3 (14.3%)
SiO2 (70%)
Head grade of U from 100 to 395 ppm.

6. Beneficiation of Uranium Brannerite Ores
Bulk Mineralogy of our Samples - QEMSCAN
Others Mica Fe Mn Oxides Brannerite
1% 8% 0% 0% Pyrite
0% Quartz
Rutile/anatase 24%
1%
Calcite Apatite
0% 2%
Thorite
0%
Other Silicates
1%
Feldspar
63%
• Brannerite predominantly liberated or high grade middling in -1.0mm sample
• Average grain size from 5 – 25 microns, but up to 250 microns top size

7. Beneficiation of Uranium Brannerite Ores
Assay by Size
• Screened from 3.35mm 1400
to 20 microns
1200
Observed
1000
• High grade U in the -20
micron fractions
U (ppm)
800
• U in the large size 600
fractions
• Cumulative grade by size 400
shows U evenly distributed
200
by mass
0
0.000 0.025 0.050 0.075 0.100 0.125 0.150 0.175 0.200 0.225 0.250 0.275 0.300
Size (mm)
Sample 1 Sample 2 Sample 3 Sample 4 Sample 5

8. Beneficiation of Uranium Brannerite Ores
Processing Implications from Mineralogy
• Beneficiation prior to grinding unlikely to be successful
• High SG likely to favour gravity separation
• Concentration Criterion of 1.9-2.7 depending on SG value of Brannerite
• Leach likely to involve high free acid levels 50g/L
• Acid consuming minerals present in significant proportions
• Presence of Mica likely to affect flotation performance
• Presence of Phosphate has some possible implications for flotation
• Paramagnetic properties presents magnetic separation potential
Recovery the driver for this client

9. Beneficiation of Uranium Brannerite Ores
Heavy Liquid Separations for Gravity Separation Assessment
Density Gradient
• Gradient of heavy liquids from low SG at
top to higher SG at bottom
• Eye-ball technique - qualitative
• -150, +75 micron fraction
• Showed potential for separation at an SG
of 2.7

10. Beneficiation of Uranium Brannerite Ores
Heavy Liquid Separations for Gravity Separation Assessment
100% 5000
• Likely to quantify the 4386 89.70% 88.10% 89.30%
90% 4500
maximum performance for 81.30%
78.90%
gravity separation 80%
3633
4000
• Each sample subjected to 70% 3500
Recovery to +2.7 SG Fraction
HLS at SG of 2.7 60% 3000
U Grade (ppm)
• Results include -20 micron 50%
2194 2159
2500
fraction 40% 2000
• Significant rejection of 30% 1367 1500
mass by gravity 20% 1000
12.60%
separation possible 10%
11.80%
7.80%
11.70% 11.70%
500
0% 0
Sample 1 Sample 2 Sample 3 Sample 4 Sample 5
Wt% U Recovery U Grade

11. Beneficiation of Uranium Brannerite Ores
Spirals
• -1.0mm feed material 100% 600
• Deslime at 250 microns 90% 519 85.5%
90.2%
84.8%
prior to spiral 80%
79.6%
78.0%
500
76.3%
74.0%
• Bulk Density 30% 70%
72.5% 73.2%
65.9%
400
• Flowrate ~1000kg/hour 60%
U Grade (ppm)
wet
Recovery (%)
305 299
50% 300
271
40%
200
30%
138
20%
100
10%
0% 0
Sample 1 Sample 2 Sample 3 Sample 4 Sample 5
Wt% U Recovery U Grade

12. Beneficiation of Uranium Brannerite Ores
Spiral Enhancement
100% 600
• Observed tail was 94.9%
534
dominated by large 90%
519 85.5%
white grains 80%
500
• Deslime the tail post 70%
69.0%
spiral at 250 microns 65.9%
400
60%
• +250 micron tail
U Grade (ppm)
Recovery %
comprised 90% of the 50% 300
mass and assayed at
40%
89 ppm U
200
• Suggests potential 30%
for sequential 20%
scavenger/cleaner 100
spiral arrangement 10%
0% 0
Sample 1 Sample 1 with Tail Deslimed at 250 microns
Wt% U Recovery U Grade

13. Beneficiation of Uranium Brannerite Ores
Sighter Flotation – 2.5L cell
Range of Collectors Tested
2000
1800
1600
1400
1200
U Grade (ppm)
1000
800
600
400
200
0
0 10 20 30 40 50 60 70 80 90 100
U Recovery (%)
mono/di phosphoric acid esther (-) fatty acid (-) alkyl hydroxamate (-) talow diamine acetate (+)
• Anionic collectors performed better than the cationic one
• Fatty acid achieved 79.4% recovery at a grade of 1096ppm in 26.6% of the weight.

14. Beneficiation of Uranium Brannerite Ores
Bulk Flotation – 15L cell
100% 1600
• Increased float time 90%
to 40 minutes 1400
80%
• 45 floats conducted 1200
to produce a bulk 70%
concentrate 60%
1000
U Grade (ppm)
Recovery (%)
50% 800
40%
600
• Average U recovery
30%
89%, peaking at 95% 400
20%
• Average U grade
200
1096 ppm 10%
• Average mass 0%
0 5 10 15 20 25 30 35 40 45 50
0
rejected 78% Float Number
Wt Recovery (%) U Recovery (%) U Grade (ppm)

15. Beneficiation of Uranium Brannerite Ores
Magnetic Separation
Conducted as part of our new WHIMS commissioning
• Initial Frantz testing done on a 38-212 micron split of Sample 4
• Very visual split achieved
• U grade 2571ppm in 9.6% of the mass but only 61.5% recovery

16. Beneficiation of Uranium Brannerite Ores
AMDEL WHIMS Standard Test Sequence
SAMPLE
Non Mags
Mags WHIMS Pass 1
WHIMS Mags WHIMS Mags
Scavenger Cleaner 1
Non Non
Non
Mags Mags WHIMS Mags
Mags
Cleaner 2
Non
Mags WHIMS Mags
Cleaner 3
TAIL MIDS CON

17. Beneficiation of Uranium Brannerite Ores
Magnetic Separation
100% 3500
90% 87.9%
2930 83.7% 3000
• Test at 2 magnetic 80%
intensities, 10kG and 2436
73.7% 74.1%
2500
18kG 70%
• High intensity expected 60%
2000
U Grade (ppm)
Recovery (%)
to be required for 50%
paramagnetic 43.3%
1500
Brannerite 40%
34.7%
• Significantly different 30%
1000
behaviour amongst 20.9%
18.0%
833 811
20%
the two samples 500
tested 10%
0% 0
Sample 1 - WHIMS 10kG Sample 1 - WHIMS 18kG Sample 4 - WHIMS 10kG Sample 4 - WHIMS 18kG
Wt% U Recovery U Grade

18. Beneficiation of Uranium Brannerite Ores
Quick Comparison of the Three Beneficiation Techniques
100% 1200
90%
1000
80%
70%
800
60%
U Grade (ppm)
Recovery %)
50% 600
40%
400
30%
20%
200
10%
0% 0
Spiral Flotation Magnetic Separation
Beneficiation Method
Wt% U Recovery U Grade

19. Beneficiation of Uranium Brannerite Ores
Glimpse of Next Stage
Leach, IX and SX
• Up to 95% U extraction but at some significant acid consumptions ~254kg/T
• IX and SX results to come

20. Questions…
PS don’t forget beers on me at 5.30pm today.