Heavy Rare Earths

Successful Production of 51.8% TREO Mixed Rare Earth Carbonate from Cowalinya

Heavy Rare Earths Limited (“HRE” or “the Company”) is pleased to report success in producing a mixed rare earth carbonate (MREC) sample from rare earth mineralisation at its 100 per cent-owned Cowalinya project near Esperance in Western Australia.

  • Cowalinya rare earth mineralisation supports development of conceptual downstream process flowsheet to mixed rare earth carbonate (MREC)
  • MREC sample grading 51.8% TREO produced
  • Potential commercial value of MREC enhanced by very high magnet rare earth composition of 31.2%
  • Collection of 3 tonnes of mineralisation from Cowalinya in progress for upscaled process optimisation program
HRE Executive Director, Richard Brescianini, said, “We are pleased with the outcome of our initial attempt at designing and testing a downstream flowsheet to treat saprolite-hosted mineralisation from Cowalinya.

“The 51.8% TREO mixed rare earth carbonate result exceeded my expectation, and the high proportion of magnet rare earths of more than 31% attests to its potential for premium commercial value. Nonetheless we still have work to do to reduce impurities to levels that are necessary to demonstrate product marketability.

“Taken together with the positive metallurgical variability testwork results reported in March, we are sufficiently encouraged by today’s result to upscale our downstream program to produce an increased volume of mixed rare earth carbonate for market assessment. Collection of feed material for this program is underway.”

In previous phases of the metallurgical program, simple screening of 13 (mainly 5-metre) mineralised composites from 10 drill holes by Perth-based Strategic Metallurgy (“Strategic”) demonstrated a 2x rare earth upgrade to -25µm undersize representing 37.2% of the bulk saprolite feed mass (refer to ASX announcement 13 December 2022). Subsequent acid leaching of the undersize by Strategic extracted an average of 82.9% of the magnet rare earths, consuming 18.1 kg of 32% hydrochloric acid per tonne of undersize feed for preferred material types (refer to ASX announcement 12 July 2023).

These results allowed HRE to develop whole rock geochemical algorithms to select an additional 63 (mainly 6-metre) mineralised composites from 55 drill holes across the entire project area for an expanded program of sizing and diagnostic leach testing. This program delivered results consistent with earlier phases of the program and demonstrated relatively modest metallurgical variability across the Cowalinya resource with preferred material types, characterised by high leachability (>75%) of the payable magnet rare earths Pr, Nd, Tb and Dy and low consumption (<40 kilograms per tonne of undersize feed) of 32% hydrochloric acid, potentially occupying a sizeable extent of the currently defined resource (refer to ASX announcement 12 March 2024).

Separately, Strategic prepared a 1 kg blend of screened undersize leach feed from 4 of the 13 mineralised composites used in the original sizing and acid leaching sighter work, for the development of a conceptual downstream flowsheet to produce MREC. The sample blend had a TREO grade of 2,595 ppm and was subjected to a simple leach, purification and precipitation regime as shown in Figure 1.

Figure 1: MREC testwork flowsheet.

Without any optimisation, a high grade (51.8% TREO) MREC was produced containing a high proportion of the valuable magnet rare earths Pr, Nd, Tb and Dy representing 31.2% of the total rare earth content. A detailed analysis of the rare earth content in the leach feed and MREC solids is presented in Table 1.

Whilst the total impurity content at 8.4% (mainly iron, copper and sodium) is over specification for a commercial rare earth separation plant (typically below 5%), the Company emphasises that this was a ‘first pass’ concept program to demonstrate that MREC can be produced from the Cowalinya deposit.

Click here for the full ASX Release

This article includes content from Heavy Rare Earths, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.

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"With extensive subsidies and non-market practices leading to substantial risks of overcapacity, China's exports of EVs grew by 70% from 2022 to 2023-jeopardizing productive investments elsewhere. A 100% tariff rate on EVs will protect American manufacturers from China's unfair trade practices."

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# # #


About Ucore Rare Metals Inc.

Ucore is focused on rare- and critical-metal resources, extraction, beneficiation, and separation technologies with the potential for production, growth, and scalability. Ucore's vision and plan is to become a leading advanced technology company, providing best-in-class metal separation products and services to the mining and mineral extraction industry.

Through strategic partnerships, this plan includes disrupting the People's Republic of China's control of the North American REE supply chain through the near-term establishment of a heavy and light rare-earth processing facility in the U.S. State of Louisiana, subsequent Strategic Metal Complexes in Canada and Alaska and the longer-term development of Ucore's 100% controlled Bokan-Dotson Ridge Rare Heavy REE Project on Prince of Wales Island in Southeast Alaska, USA.

Ucore is listed on the TSXV under the trading symbol "UCU" and in the United States on the OTC Markets' OTCQX® Best Market under the ticker symbol "UURAF."

For further information, please visit www.ucore.com.

Forward-Looking Statements

This press release includes certain statements that may be deemed "forward-looking statements." All statements in this release (other than statements of historical facts) that address future business development, technological development and/or acquisition activities (including any related required financings), timelines, events, or developments that the Company is pursuing are forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance or results, and actual results or developments may differ materially from those in forward-looking statements.

Regarding any disclosure in the press release above about the US Department of Defense or the Government of Canada Programs and the expected successful progress and resulting milestone payments from these Programs, the Company has assumed that the Programs (including each of their milestones) will be completed satisfactorily. For additional risks and uncertainties regarding the Company, the CDF, the Demo Plant and ongoing Programs (generally), see the risk disclosure in the Company's MD&A for Q3-2023 (filed on SEDAR on November 20, 2023) (www.sedarplus.ca) as well as the risks described below.

Regarding the disclosure above in the "About Ucore Rare Metals Inc." section, the Company has assumed that it will be able to procure or retain additional partners and/or suppliers, in addition to Innovation Metals Corp. ("IMC"), as suppliers for Ucore's expected future Strategic Metals Complexes ("SMCs"). Ucore has also assumed that sufficient external funding will be found to complete the Demo Plant demonstration schedule and also later prepare a new National Instrument 43-101 ("NI 43-101") technical report that demonstrates that the Bokan Mountain Rare Earth Element project ("Bokan") is feasible and economically viable for the production of both REE and co-product metals and the then prevailing market prices based upon assumed customer offtake agreements. Ucore has also assumed that sufficient external funding will be secured to continue the development of the specific engineering plans for the SMCs and their construction. Factors that could cause actual results to differ materially from those in forward-looking statements include, without limitation: IMC failing to protect its intellectual property rights in RapidSX™; RapidSX™ failing to demonstrate commercial viability in large commercial-scale applications; Ucore not being able to procure additional key partners or suppliers for the SMCs; Ucore not being able to raise sufficient funds to fund the specific design and construction of the SMCs and/or the continued development of RapidSX™; adverse capital-market conditions; unexpected due-diligence findings; the emergence of alternative superior metallurgy and metal-separation technologies; the inability of Ucore and/or IMC to retain its key staff members; a change in the legislation in Louisiana or Alaska and/or in the support expressed by the Alaska Industrial Development and Export Authority ("AIDEA") regarding the development of Bokan; the availability and procurement of any required interim and/or long-term financing that may be required; and general economic, market or business conditions.

Neither the TSXV nor its Regulation Services Provider (as that term is defined by the TSXV) accept responsibility for the adequacy or accuracy of this release.


Mr. Michael Schrider, P.E., Ucore Vice President and Chief Operating Officer, is responsible for the content of this news release and may be contacted at 1.902.482.5214.

For additional information, please contact:

Mark MacDonald
Vice President, Investor Relations
Ucore Rare Metals Inc.

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