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Aclara Announces Update on its Rare Earths Separation Project

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TORONTO, ON / ACCESSWIRE / October 15, 2024 / Aclara Resources Inc. ("Aclara" or the "Company") (TSX:ARA) is pleased to announce the completion of a conceptual engineering study for its rare earths ("REE") separation project, currently being developed by its U.S.-based subsidiary, Aclara Technologies. The separation flowsheet concept, based on solvent extraction, was developed in collaboration with the Saskatchewan Research Council. This concept provided the foundation for Hatch to complete a Class 5-AACE CAPEX and OPEX estimate, while also incorporating robust environmental features such as significant waste reduction and zero liquid discharge. The initial results are highly encouraging, and positions Aclara to become the first vertically integrated heavy rare earths company outside of Asia.

Technical Study Highlights

  • Separation of Key REE: Considers the separation of its mixed rare earth carbonates ("MREC") to be produced by the Company's Carina Project and the Penco Module to obtain high-purity didymium[1](NdPr), dysprosium (Dy) and terbium (Tb).

  • Proven Technology: The flowsheet process employs solvent extraction technology with hydrochloric acid chemistry.

  • High Purity: Achieves over 99.5% purity for all separated REE.

  • Strong Metallurgical Recoveries: Expected metallurgical recoveries of 94% for NdPr, 92% for Dy and 91% for Tb.

  • Environmental Features: Incorporates full water recirculation achieving no liquid discharge.

  • Unoptimized CAPEX and OPEX: Initial CAPEX is estimated at US$ 354 million, which includes US$ 244 million for the solvent extraction plant andUS$110 million to significantly reduce waste and achieve zero liquid discharges. OPEX is estimated at US$ 12 per kg of rare earth oxides (REO).

  • Synergies with Circular Mineral Harvesting Process: The development of the separation project has uncovered significant synergies with Aclara's proprietary circular mineral harvesting process, leading to several new initiatives aimed at (i) reducing CAPEX and OPEX at both mine and separation stages, (ii) minimizing waste management costs, and (iii) maximizing the quality of MREC output from the Carina Project and Penco Module.

Next Steps

The Company has begun advancing the following activities as part of the next stage of development of its separation project:

  • Trade-off Chemistry: Conducting a trade-off study comparing the base case of hydrochloric acid chemistry to a nitrate-based chemistry for the separation flowsheet process.

  • Location Study: Conducting a detailed analysis within the U.S. to identify an optimal site for the contemplated industrial separation facility, with the goal of maximizing efficiency and minimizing cost and development timeline.

  • Metallurgical Testing and Optimization: Executing bench scale and mini-pilot testing to optimize the contemplated separation flowsheet, CAPEX and OPEX. Based on these results, the Company will assess the implementation of an integrated piloting campaign and the development of a Class 3-AACE CAPEX and OPEX engineering study.