Metallurgical Optimisation Delivers High Recoveries 3 pages 362.0KB
Original announcement by asx on
- Company
- Aurora Energy Metals Limited
- Ticker
- 1AE
- Exchange
- ASX
- Region
- southeast Oregon, USA
- Primary commodity
- Uranium
- Secondary commodities
- None reported
- Document categories
- Metallurgy
- Extracted
- 2026-10-01 04:40:15 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Aurora Energy Metals Limited announced highly positive results from its metallurgical optimisation program for the Aurora Uranium Project. The program confirmed high uranium recoveries in the 82-86% range, while dramatically reducing initial acid addition and overall acid consumption, and halving leach duration. The testwork also simplified the flowsheet by demonstrating co-processing of clay and middlings, and eliminated the need for ferric sulphate, all of which are expected to significantly improve project economics.
Reasoning: The metallurgical optimisation program delivered high uranium recoveries (82-86%) while significantly reducing reagent consumption (acid, ferric sulphate), shortening leach times, and simplifying the processing flowsheet. These improvements are expected to materially enhance the project's economics and de-risk future studies.
Positive factors
- Significantly reduced acid consumption (initial and overall)
- Reduced leach duration by 50%
- Elimination of ferric sulphate requirement
- Simplified flowsheet by processing clay and middlings together
- Demonstrated potential for further cost savings through leach solution recycling
- High uranium recoveries consistently achieved
Low confidence — this extraction should be reviewed alongside the original source.
Facts used in scoring: 19
Classification and evidence
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: The optimisation program confirmed uranium recoveries in the high 80% range (82–86%), with several tests achieving over 88% and even 90% recovery, which is in the strong to exceptional band for uranium.
Evidence · text
“uranium recoveries in the high 80% range (82–86%) can be consistently achieved under optimised conditions”
Recovery Improvingpositive
Recovery improved versus a like-for-like prior test program on the same domain and route.
Why it applies: The program achieved recovery with significantly reduced initial acid addition (≈250–240 kg/t vs. >600 kg/t previously) and overall acid consumption (~70–90 kg/t), and leach duration was halved from 24 hours to ~12 hours.
Evidence · text
“Recovery achieved with significantly reduced initial acid addition (≈250–240 kg/t vs. >600 kg/t previously). Acid consumption lowered to ~70–90 kg/t, enhancing project economics. Leach duration reduced to ~12 hours”
Multi-Domain Testedpositive
Variability across ore domains (oxide, transition, fresh) has been addressed.
Why it applies: Tests demonstrate no requirement for separate processing of clay and middlings, simplifying the flowsheet and reducing costs.
Evidence · text
“Tests demonstrate no requirement for separate processing of clay and middlings, simplifying flowsheet and reducing capital/operating costs.”
QP/CP Signedpositive · Story-specific tag
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: The metallurgical results are based on information compiled by Mr. Warren Hallam, a director of Aurora Energy Metals Limited and a Fellow of the Australasian Institute of Mining and Metallurgy (FAusIMM), who qualifies as a Competent Person.
Evidence · text
“The information in this announcement relating to Metallurgical Results is based on information compiled by Mr. Warren Hallam, BSc (Metallurgy), a director of Aurora Energy Metals Limited, who is a Fellow of the Australasian Institute of Mining and Metallurgy (FAusIMM)”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The testwork was conducted using atmospheric and pressure leach methods, which are typical for mill processing routes.
Evidence · table
“Atmospheric”
Context: M2 Middlings
Extracted facts
Stored fact records: 19. Some facts used in scoring do not have a stored record.
Metallurgical Results (19)
Atmospheric leachAurora Uranium Project · uraniumRecovery: 85 %Historical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- preliminary
- Test Type
- Atmospheric leach
- Processing Route
- Atmospheric leach
- Sample
- clay and middlings fractions
Recovery
- Recovery
- 85 %
Reagents
- Acid
- 600 kg/t
- Reagent Notes
- High acid additions (>600 kg/t). Ferric sulphate likely used. Leach duration 24 hours.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
- Historical Source Date
- 2024-12-16T00:00:00.000Z
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This historical result established a strong basis for further work with high recoveries, but also highlighted opportunities for process optimization due to high reagent intensity and longer leach duration.
Positive factors
- High recovery achieved
Negative factors
- High acid consumption
- Longer leach duration
Evidence · text
“recoveries of more than 85% from both clay and middlings fractions using atmospheric leach circuits at high acid additions (ASX release 16 December 2024)”
AtmosphericAurora Uranium Project · uraniumRecovery: 72.1 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M2 Middlings
- Grind P80
- 600 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 72.1 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 51 kg/t
- Reagent Notes
- Initial Acid Addition: 150 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test shows reduced acid consumption and potential for further savings, but the recovery is not as high as the optimized range, indicating variability or sub-optimal conditions for this specific test.
Positive factors
- Reduced acid consumption compared to prior tests
- Potential for further cost savings through leach solution recycling
Negative factors
- Recovery is lower than the high 80% range achieved in other optimized tests
Evidence · table
“721”
Context: M2 Middlings
AtmosphericAurora Uranium Project · uraniumRecovery: 66.1 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M3 Middlings
- Grind P80
- 300 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 66.1 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 61 kg/t
- Reagent Notes
- Initial Acid Addition: 150 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test shows reduced acid consumption but a lower recovery, suggesting that the grind size or other parameters were not optimal for achieving the highest recoveries in this specific test.
Positive factors
- Reduced acid consumption compared to prior tests
- Potential for further cost savings through leach solution recycling
Negative factors
- Recovery is lower than the high 80% range achieved in other optimized tests
Evidence · table
“661”
Context: M3 Middlings
AtmosphericAurora Uranium Project · uraniumRecovery: 70.1 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M4 Middlings
- Grind P80
- 150 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 70.1 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 54 kg/t
- Reagent Notes
- Initial Acid Addition: 150 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test shows reduced acid consumption but a lower recovery, suggesting that the grind size or other parameters were not optimal for achieving the highest recoveries in this specific test.
Positive factors
- Reduced acid consumption compared to prior tests
- Potential for further cost savings through leach solution recycling
Negative factors
- Recovery is lower than the high 80% range achieved in other optimized tests
Evidence · table
“701”
Context: M4 Middlings
AtmosphericAurora Uranium Project · uraniumRecovery: 75.1 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M7 Middlings
- Grind P80
- 600 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 75.1 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 27 kg/t
- Reagent Notes
- Initial Acid Addition: 150 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test shows very low acid consumption and potential for further savings, but the recovery is still below the optimized range, indicating that other parameters might need adjustment for higher recovery.
Positive factors
- Reduced acid consumption compared to prior tests
- Potential for further cost savings through leach solution recycling
Negative factors
- Recovery is lower than the high 80% range achieved in other optimized tests
Evidence · table
“751”
Context: M7 Middlings
AtmosphericAurora Uranium Project · uraniumRecovery: 89.1 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M10 Middlings
- Grind P80
- 600 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 89.1 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 133 kg/t
- Reagent Notes
- Initial Acid Addition: 630 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test demonstrates a strong recovery in the high 80% range, aligning with the overall positive results of the optimization program.
Positive factors
- High recovery achieved (strong band)
- Potential for further cost savings through leach solution recycling
Evidence · table
“891”
Context: M10 Middlings
AtmosphericAurora Uranium Project · uraniumRecovery: 90.1 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M11 Middlings
- Grind P80
- 600 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 90.1 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 142 kg/t
- Reagent Notes
- Initial Acid Addition: 630 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test achieved an exceptional recovery of over 90%, demonstrating the high potential of the optimized process.
Positive factors
- Exceptional recovery achieved (exceptional band)
- Potential for further cost savings through leach solution recycling
Evidence · table
“901”
Context: M11 Middlings
AtmosphericAurora Uranium Project · uraniumRecovery: 77.2 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M12 Middlings
- Grind P80
- 600 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 77.2 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 69 kg/t
- Reagent Notes
- Initial Acid Addition: 150 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test shows reduced acid consumption and potential for further savings, but the recovery is still below the optimized range, indicating that other parameters might need adjustment for higher recovery.
Positive factors
- Reduced acid consumption compared to prior tests
- Potential for further cost savings through leach solution recycling
Negative factors
- Recovery is lower than the high 80% range achieved in other optimized tests
Evidence · table
“772”
Context: M12 Middlings
AtmosphericAurora Uranium Project · uraniumRecovery: 93.2 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M13 Middlings
- Grind P80
- 600 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 93.2 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 43 kg/t
- Reagent Notes
- Initial Acid Addition: 400 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test achieved an exceptional recovery with very low acid consumption, highlighting the significant improvements from the optimization program.
Positive factors
- Exceptional recovery achieved (exceptional band)
- Very low acid consumption
- Potential for further cost savings through leach solution recycling
Evidence · table
“932”
Context: M13 Middlings
AtmosphericAurora Uranium Project · uraniumRecovery: 89.2 %Head Grade: 381Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- M14 Middlings
- Grind P80
- 600 µm
- Leach Time
- 12 hours
Recovery
- Recovery
- 89.2 %
- Head Grade
- 381
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 33 kg/t
- Reagent Notes
- Initial Acid Addition: 250 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test demonstrates high recovery with significantly reduced acid consumption and leach duration, representing a key achievement of the optimization program.
Positive factors
- High recovery achieved (strong band)
- Very low acid consumption
- Reduced leach duration (12 hours)
- Potential for further cost savings through leach solution recycling
Evidence · table
“892”
Context: M14 Middlings
PressureAurora Uranium Project · uraniumRecovery: 45.3 %Head Grade: 350Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Pressure
- Processing Route
- Pressure leach
- Sample
- C5 Clay
- Grind P80
- 38 µm
- Leach Time
- 2 hours
Recovery
- Recovery
- 45.3 %
- Head Grade
- 350
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 44 kg/t
- Reagent Notes
- Initial Acid Addition: 150 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: Despite a very short leach duration and reduced acid consumption, the recovery for this pressure leach test on clay material is very low, indicating this specific condition is not optimal.
Positive factors
- Very short leach duration (2 hours)
- Reduced acid consumption compared to prior tests
- Potential for further cost savings through leach solution recycling
Negative factors
- Very low recovery (below weak band)
Evidence · table
“453”
Context: C5 Clay
AtmosphericAurora Uranium Project · uraniumRecovery: 88.1 %Head Grade: 350Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- C6 Clay
- Grind P80
- 38 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 88.1 %
- Head Grade
- 350
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- -17 kg/t
- Reagent Notes
- Initial Acid Addition: 150 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test on clay material achieved a high recovery with exceptionally low acid consumption, indicating a very efficient process under these conditions.
Positive factors
- High recovery achieved (strong band)
- Very low acid consumption (negative value implies acid generation or very low consumption)
- Potential for further cost savings through leach solution recycling
Evidence · table
“881”
Context: C6 Clay
PressureAurora Uranium Project · uraniumRecovery: 85.3 %Head Grade: 350Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Pressure
- Processing Route
- Pressure leach
- Sample
- C8 Clay
- Grind P80
- 38 µm
- Leach Time
- 2 hours
Recovery
- Recovery
- 85.3 %
- Head Grade
- 350
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 125 kg/t
- Reagent Notes
- Initial Acid Addition: 630 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This pressure leach test on clay achieved a high recovery in a very short leach duration, demonstrating efficient processing for this material type.
Positive factors
- High recovery achieved (moderate band)
- Very short leach duration (2 hours)
- Potential for further cost savings through leach solution recycling
Evidence · table
“853”
Context: C8 Clay
AtmosphericAurora Uranium Project · uraniumRecovery: 90.2 %Head Grade: 350Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- C9 Clay
- Grind P80
- 38 µm
- Leach Time
- 24 hours
Recovery
- Recovery
- 90.2 %
- Head Grade
- 350
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 51 kg/t
- Reagent Notes
- Initial Acid Addition: 630 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test on clay material achieved an exceptional recovery with very low acid consumption, demonstrating the high potential of the optimized atmospheric leach process.
Positive factors
- Exceptional recovery achieved (exceptional band)
- Very low acid consumption
- Potential for further cost savings through leach solution recycling
Evidence · table
“902”
Context: C9 Clay
AtmosphericAurora Uranium Project · uraniumRecovery: 82.2 %Head Grade: 389Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- MC15 Midds + Clay
- Grind P80
- 600 µm
- Leach Time
- 12 hours
Recovery
- Recovery
- 82.2 %
- Head Grade
- 389
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 84 kg/t
- Reagent Notes
- Initial Acid Addition: 270 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test successfully demonstrates high recovery from a combined middlings and clay sample with reduced acid consumption and leach duration, confirming the simplified flowsheet potential.
Positive factors
- High recovery achieved (moderate band)
- Reduced acid consumption
- Reduced leach duration (12 hours)
- Demonstrates co-processing of middlings and clay
- Potential for further cost savings through leach solution recycling
Evidence · table
“822”
Context: MC15 Midds + Clay
AtmosphericAurora Uranium Project · uraniumRecovery: 86.2 %Head Grade: 389Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- MC16 Midds + Clay
- Grind P80
- 601 µm
- Leach Time
- 12 hours
Recovery
- Recovery
- 86.2 %
- Head Grade
- 389
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 95 kg/t
- Reagent Notes
- Initial Acid Addition: 240 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test successfully demonstrates high recovery from a combined middlings and clay sample with significantly reduced acid consumption and leach duration, confirming the simplified flowsheet potential and strong project economics.
Positive factors
- High recovery achieved (strong band)
- Reduced acid consumption
- Reduced leach duration (12 hours)
- Demonstrates co-processing of middlings and clay
- Potential for further cost savings through leach solution recycling
Evidence · table
“862”
Context: MC16 Midds + Clay
AtmosphericAurora Uranium Project · uraniumRecovery: 84.2 %Head Grade: 389Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- MC17 Midds + Clay
- Grind P80
- 602 µm
- Leach Time
- 12 hours
Recovery
- Recovery
- 84.2 %
- Head Grade
- 389
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 64 kg/t
- Reagent Notes
- Initial Acid Addition: 240 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test successfully demonstrates high recovery from a combined middlings and clay sample with reduced acid consumption and leach duration, confirming the simplified flowsheet potential.
Positive factors
- High recovery achieved (moderate band)
- Reduced acid consumption
- Reduced leach duration (12 hours)
- Demonstrates co-processing of middlings and clay
- Potential for further cost savings through leach solution recycling
Evidence · table
“842”
Context: MC17 Midds + Clay
AtmosphericAurora Uranium Project · uraniumRecovery: 80.2 %Head Grade: 389Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- MC18 Midds + Clay
- Grind P80
- 603 µm
- Leach Time
- 12 hours
Recovery
- Recovery
- 80.2 %
- Head Grade
- 389
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 66 kg/t
- Reagent Notes
- Initial Acid Addition: 240 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test successfully demonstrates good recovery from a combined middlings and clay sample with reduced acid consumption and leach duration, confirming the simplified flowsheet potential.
Positive factors
- High recovery achieved (weak band)
- Reduced acid consumption
- Reduced leach duration (12 hours)
- Demonstrates co-processing of middlings and clay
- Potential for further cost savings through leach solution recycling
Evidence · table
“802”
Context: MC18 Midds + Clay
AtmosphericAurora Uranium Project · uraniumRecovery: 83.2 %Head Grade: 389Head Grade Unit: ppm U3O8View all detailsHide details
Identity
- Project
- Aurora Uranium Project
- Commodity
- uranium
- Region
- southeast oregon, usa
- Reported Region
- southeast Oregon, USA
- Ticker
- 1AE
Test Work
- Program Status
- optimization
- Test Type
- Atmospheric
- Processing Route
- Atmospheric leach
- Sample
- MC19 Midds + Clay
- Grind P80
- 604 µm
- Leach Time
- 12 hours
Recovery
- Recovery
- 83.2 %
- Head Grade
- 389
- Head Grade Unit
- ppm U3O8
Reagents
- Acid
- 83 kg/t
- Reagent Notes
- Initial Acid Addition: 239 kg/t. No ferric sulphate required. Leach solution recycling demonstrated.
Lab
- Laboratory
- ALS Metallurgy Perth
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-10-14T00:00:00.000Z
Reasoning: This test successfully demonstrates high recovery from a combined middlings and clay sample with reduced acid consumption and leach duration, confirming the simplified flowsheet potential.
Positive factors
- High recovery achieved (moderate band)
- Reduced acid consumption
- Reduced leach duration (12 hours)
- Demonstrates co-processing of middlings and clay
- Potential for further cost savings through leach solution recycling
Evidence · table
“832”
Context: MC19 Midds + Clay
How Atlas produces this analysis
Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.