Slide 1: Steven Mackowski, General Manager Project Development
Gnsto MUME PALS Steven Mackowski General Manager, Project Development Arafura Resources Ltd. eldenhoffanddliz
Slide 2: Introduction to the Nolans Project
Qnste MOM EEA Introduction to the Nolans Project * Mineralogy and Processing Approacl «© Uranium Distribution 2 ¢ Alternative processes considered . , Optimal process for RE, P & Uraniun
Slide 3: Nolans Project location and infrastructure
_Gnsta MINERALS URA 5km to gas inn Mabie Fae 10km to road 60km to rail “ a ff Alien Springs
Slide 4: anste |
anste | AAU Ee As es a DT ORWAFURA
Slide 5: Nolans Mineral Resource
Gnste MINERALS Nolans — Mineral Resource Mt REO% REO (kt) P,0.% High grade 3.9 44 174 18.3 Medium grade 6.6 24 158 lia = 10.5 Indicated Inferred
Slide 6: Nolans Project drill hole plan
Gnsto MINERALS Nolans Project — a 318000 © NBRCDS7-147 (20064) o © NBRC_C_DHO01-096 (pre-2006) ARAFURA RESOURCES NE NOLAN'S BORE PROSPECT EXPLORATION, RESOURCES, GEOLOGY Australia MGA94 (53)
Slide 7: Nolans Bore Prospect cross section
_Gnsta MINERALS UA ‘SeoonE CNBROOH: “NERO? NeReOS4 Bow toarm MAIN ZONE | OH 366,60 “o eee) ARAFURA RESOURCES.NL U,Oy- Uraant > NOLANS BORE PROSPECT. Mineedisation interval ~ t% REE Cut-off . CROSS SECTION. ——EAT———E=——_OT 1 n REO. Rarefath Oxide
Slide 8: Development Timeline
Gnste MINERALS Development Timelin EHS NOI, PER, EIS & Metallurgy I te | Meiatlurgy If | Metallurgy IV | ree cee Pitot plant | Demo plant? Marketing Design
Slide 9: Mineralogy
MINERALS ineralog * 82% fluorapatite Ca,(PO4),(F,OH) * 13% cheralite (LREE,Ca)(P,Si)O, Cheralite-Ce Ee * Clay 6 0 4%) Calcite, dolomite and quartz EE Apatite
Slide 10: Nolans Bore vs Apatites
Gnsto RUIN EIA. Se Nolans Bore % Apatites Analysis NolansBore Rare Earths (La-Sm) 5.7 USA - Florida Al 1.9 Morroco - Khoribga Ca 26 Egypt - Abu Tartur F 2.2 Russia - Kola P 12 Russia - Khibili Si 7.8 Th 0.55 Rare Earths Concentrates U 0.04 :
Slide 11: Processing approach and objectives
Gnste MINERALS primary driver with phosphate, uranium an chloride as by-products * Assess conventional process options for rare ea recovery from apatites * Assess.conventional options for rare earths reco arth conce
Slide 12: Processing of apatite and phosphate rock
anste Mihi ALsS “Processing. f spat and. phosphate rock. ¢ Sulphuric acid attack for phosphoric acid produd ~ Conventional, widely used ~ RE report with the gypsum, not recoverable ~ Uranium reports with the phosphoric acid, recovery ¢ Nitrate route for fertiliser production — RE recov ~ Commercial
Slide 13: Norsk Hydro ODDA Process
Ganste MINERALS _ Recovery of RE ‘integrated into _nitrophosphate fertiliser production. _—Norsk Hydro - ODDA Process HNO, Re. sturried in | —» CaCO, (NH,),CO, | NH.NO
Slide 14: Nitrate route limitations
RNS | PI 28s * Rare earth recovery within nitric digestion step is not very * High solids content from nitric digestion as opposed to ap: which is essentially dissolved + Rare recovery requires precipitation and two additional so extraction circuits — not simple Main focus of this process is fertili
Slide 15: Processing rare earth concentrate - acid bake
— | VEAL _ Processi * Conventional process RE Feed — Used for rare earth H,SO, phosphates + ¥ : — Relatively high temperature Acid Bake | 250°C . . v : at directly applicable to | Water Leach | — High Ca content results in gypsum formation in water leach
Slide 16: Processing rare earth concentrate - caustic conversion
to MINERALS Processing of rare earth concentrate — Caustic C * Conventional process RE Feed ~ Used for rare earth rf phosphates Caustic ~— Lower temperature Conversion 150°C * Not directly L applicable to Nolans s ~ High Ca content results in poor-phosphate olution...
Slide 17: Acid pre-leach approach
| MINERALS © Separate apatite at early stage with an acid pre-l to remove as much Ca, F and P as possible — te proved successful with nitric or hydrochloric acid the appropriate stoichiometric conditions . © Recover any rare earths that are dissolved with — test work proved successful * Pre-leach re
Slide 18: Pre-leach flowsheet
Gnste MINERALS CICITC: Hc) Nolans Bore Ore 5 i | Acid Pre - Leach | Paria TRE, U dissolution ‘Most RE” NaOH “report io solids | S Removal L | Na,SiF + REPO, ppt / “Modified | -~-Monazite RE
Slide 19: Partial dissolution of uranium in pre-leach
GQnste | MINERALS -* Partial dissolution of uranium in pre-le — Some uranium is dissolved in pre-leach liq: — Uranium can be precipitated with rare earths. liquor by the addition of metallic iron or by cor neutralisation during rare earth phosphate preci if pH is extended * Uranium —Is dissolved 1 i
Slide 20: Nolans Project Flowsheet
Nolans Project Flowsheet JT MILLION TONNE PER ANNUM ou <RUSHER:
Slide 21: Conclusions
Ganste MINERALS . Comprehensive laboratory test work is un¢ to define a process to treat Nolans mineral for the recovery of rare earths as primary. with phosphoric acid and uranium as by- * Conventional process routes have been t adapted to take into account the mineralgay specific to Nolans Pilot p