European Resources Limited has announced promising metallurgical beneficiation outcomes from its Korsnäs rare earths project in Finland, advancing the development of an integrated processing flowsheet under the EU-funded REMHub program.
- GTK-Mintec's WHGMS test work achieved up to 129% TREO grade upgrade with strong recoveries
- Two mineralisation types, allanite dominant and apatite-monazite dominant, show significant beneficiation potential
- Flotation test work underway to refine beneficiation flowsheet
- ANSTO progressing downstream hydrometallurgical testing on historical concentrate material
- Next steps include mini-pilot campaigns and integrated process pathway development
Metallurgical Progress at Korsnäs
European Resources Limited (ASX:ERE) has reported encouraging metallurgical beneficiation results from its Korsnäs rare earths project in western Finland, achieved under the European Union-funded REMHub program. The specialist test work, conducted by GTK-Mintec, focused on Wet High Gradient Magnetic Separation (WHGMS) and demonstrated significant upgrades in Total Rare Earth Oxides (TREO) grades alongside strong recoveries for two distinct mineralisation types.
The two representative sample types tested were a higher-grade allanite dominant material (Type 1) with an initial TREO assay of 1.35%, and a lower-grade apatite-monazite dominant material (Type 2) assayed at 0.24% TREO. For context, the previously reported Korsnäs Inferred Mineral Resource at a 0.5% TREO cut-off is estimated at 13.5 million tonnes at 1.02% TREO, indicating that the Type 2 material is relatively low grade.
Beneficiation Test Results
WHGMS test work on Type 1 material achieved an 84% upgrade in TREO content while maintaining an 85% TREO recovery at a magnetic field strength of 0.5 Tesla, with a grind size of P80 passing 100 micrometres. Increasing the magnetic field strength to 1.8 Tesla further improved the grade upgrade to 160%, but recovery dropped to 42%. For Type 2 material, WHGMS delivered a 129% TREO upgrade with 74% recovery at 0.5 Tesla and a grind size of P80 passing 85 micrometres. At 1.8 Tesla, the upgrade rose to 220%, but recovery declined to 26%. Notably, the test work indicated that de-sliming was not required under the reported conditions for both sample types.
Gravity concentration tests were also performed but yielded lower recoveries compared to WHGMS, suggesting WHGMS as the more promising beneficiation method at this stage. The test work is preliminary and laboratory-scale, with further flotation testing underway to improve concentrate quality and support the development of a practical beneficiation flowsheet.
Downstream Processing and Integration
In parallel with GTK-Mintec's beneficiation work, ANSTO (the Australian Nuclear Science and Technology Organisation) is conducting downstream hydrometallurgical test work on historical lanthanide concentrate stockpile material from Korsnäs. This includes pre-leach and acid-bake testing aimed at defining a preferred downstream leach route and assessing solution suitability for subsequent rare earth separation processes.
European Resources plans to integrate the beneficiation and hydrometallurgical programs to establish an end-to-end processing pathway for the Korsnäs project. The next phases include mini-pilot scale campaigns under the REMHub program to validate the beneficiation route, generate process design data, and produce sufficient concentrate for downstream testing.
Company Commentary and Outlook
Managing Director Jason Beckton described the results as a "clear step forward" for Korsnäs, highlighting the ability to significantly upgrade both higher-grade allanite dominant and lower-grade apatite-monazite dominant mineralisation ahead of downstream processing. Consulting metallurgist Dr Mark Steemson noted the encouraging nature of the early-stage results, particularly the improved recoveries with WHGMS compared to gravity methods and the emerging understanding of grade-recovery trade-offs at different magnetic field strengths.
European Resources emphasises that these results are part of an ongoing metallurgical program and that further flotation and pilot-scale work, alongside ANSTO's downstream studies, are necessary to confirm and optimize the processing flowsheet. The company intends to provide updates as additional test results become available.
These developments follow recent capital raising efforts by European Resources to fund exploration and metallurgical work at Korsnäs, including a $4.26 million renounceable entitlement offer announced in March 2026. The project remains strategically positioned to benefit from increasing demand for rare earth elements in Europe amid geopolitical and supply chain considerations.
Bottom Line?
While early metallurgical results are promising, further pilot-scale validation and downstream integration are essential to confirm the viability of the Korsnäs processing route.
Questions in the middle?
- How will flotation test work influence the final beneficiation flowsheet and concentrate quality?
- What timelines are anticipated for completing mini-pilot campaigns and integrating downstream hydrometallurgical processes?
- How might these metallurgical advances impact the overall project economics and development schedule?