Rare Element Resources Provides Rare Earth Demonstration Plant Update

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LITTLETON, Colo., April 17, 2025--(BUSINESS WIRE)--Rare Element Resources Ltd. (the "Company" or "RER") (OTCQB: REEMF) announces an updated timeline for the commencement of operations of the Company’s rare earth processing and separation demonstration plant in Upton, Wyoming (the "Demonstration Plant"). The data gathered from the operation of the Demonstration Plant, which was designed and constructed by a General Atomics-led consortium of companies, will be material in advancing the design and economics of a commercial plant utilizing the Company’s proprietary processing and separation technology. As the recently constructed Demonstration Plant progressed through the equipment shakedown process, several key design and equipment modifications were identified as necessary to achieve satisfactory operational status. RER, in conjunction with the mineral processing experts at UIT (an affiliate of General Atomics which was instrumental in advancing the technology through the successful pilot testing phase), is currently undertaking a system-wide review and will be recommending upgrades and improvements to the Demonstration Plant. Following the review, recommended modifications and upgrades will be implemented. As a result, the commencement of operations will be delayed by several months.

"As we progressed the plant toward operations during the past several months, our engineers and scientists identified multiple design and installation improvements that, if addressed now, will further increase the likelihood of successful, safe operations of our first-of-its-kind rare earth processing and separation Demonstration Plant," stated Ken Mushinski, the Company’s President and Chief Executive Officer. Mr. Mushinski added, "The knowledge gained from the operation of this Demonstration Plant will be of utmost importance to the progression toward full-scale commercial operations with our unique technology. Understanding the critical need for a secure, domestic rare earth supply chain, the Company, with the unanimous backing of its Board of Directors, fully supports this opportunity for potential improvements through this review."

It is anticipated that the design and equipment review will be completed by the end of May 2025, after which the Company will source any needed additional equipment and materials for incorporation into the plant. After additional shake-down and startup testing, operations are expected in late 2025. As recommendations and the schedule are confirmed, the Company will provide additional updates on the timeline, as well as any impact on overall project cost. The Demonstration Plant is planned to operate for up to 10 months and produce up to 10 tons of separated Nd/Pr oxide, which will support the Company’s ongoing discussions with potential strategic partners and offtake customers.