Lake Hope
High Purity Alumina (HPA) Project | Western Australia | IPT earning 80%
Lake Hope is Impact Minerals’ flagship asset located ~500 km southeast of Perth in the Goldfields-Esperance region of Western Australia where the Ngadju people are traditional custodians of the land.
Impact owns an 80% interest in the project with 20% owned by Playa One Pty Ltd. The project includes a deposit hosting high-grade alumina-rich clays in the top two metres of two salt lake beds. This alumina ore is accessible by simple, low-impact digging and is able to be campaign mined. In addition to a Probable and Proved ore reserve of 1.7 Mt of contained units of Al₂O₃, Impact also has a patented low-temperature leach process to convert the alumina-bearing minerals into high-purity alumina.
The company completed a pre-feasibility study in mid-2025 highlighting a project NPV10 of A$1.165 billion (with no by-product revenue), Capex of A$259m and potential Opex as low as <$US4,500 per tonne with by-product credit. Impact is now undertaking feasibility studies to further define the Lake Hope project economics.
HPA is a critical advanced material with 99.99%+ purity (Al₂O₃) essential for lithium-ion battery separators, LED lighting and semiconductor substrates. The global market is projected to reach US$15.8 billion by 2030 at ~20% CAGR.
Impact has focused on fast-tracking its entry into the HPA marketplace since entering the Lake Hope project joint venture.
Mar 2023
Mar 2023
Option to acquire 80% of Playa One Pty Ltd (Lake Hope resource & IP).
Jun 2023
Jun 2023
Maiden Mineral Resource
Nov 2023
Nov 2023
Positive Scoping Study — post-tax NPV₈ A$1.334B at 10,000 tpa.
Feb 2024
Feb 2024
Low Temperature Leach process breakthrough — 4N HPA (99.99%) produced at low temperature.
Aug 2024
Aug 2024
Mining Lease Application lodged.
Oct 2024
Oct 2024
A$2.87M CRC-P federal grant awarded (with CPC Engineering & ECU).
Nov 2024
Nov 2024
Maiden Measured Resource of 730,000 t at 25.8% Al₂O₃.
Apr 2025
Apr 2025
50% interest in Alluminous Pty Ltd (HiPurA® technology) acquired.
Jun 2025
Jun 2025
Positive PFS released — NPV10 A$1.165B, IRR 47.5%, Opex US$5,860/t, Maiden Ore Reserve 1.7 Mt.
Jul 2025
Jul 2025
80% stake in Playa One completed; DFS commenced.
2026
2026
Pilot plant construction is underway (CRC-P co-funded). Membrane Selective Technology (MST) integration advancing with ECU MRRC. Mining lease approvals and DFS progressing. Offtake discussions initiated.
9 Jan 2026
9 Jan 2026
Lake Hope HPA Project Update — CRC-P Year One Results
Membrane technology integration delivering promising early results across the HPA flowsheet; all PFS assumptions and financial forecasts confirmed unchanged since June 2025.
30 Jan 2026
30 Jan 2026
December 2025 Quarterly Activities Report
Bench-scale membrane crystallisation of SOP by-product achieved; Stage 1 residue test work commenced as potential feedstock for HiPurA® integration.
2027
2027
Target: Definitive Feasibility Study (DFS) completion, incorporating pilot plant results and offtake parameters.
2028+
2028+
Subject to DFS, financing and offtake: Final Investment Decision (FID) and construction toward first HPA production.
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