Brazilian Rare Earths has commissioned the first stage of its Camaçari pilot plant in Bahia, producing its first rare earth mineral concentrate. The milestone advances metallurgical testing for the Monte Alto project as the company works towards completing its pre-feasibility study (PFS).
The company has also secured R$6.4 million (approximately A$1.7 million) in partner funding for Stage II, which will test hydrometallurgical extraction and rare earth separation. The contribution is expected to cover about 59% of the second stage’s capital and operating costs.
The programme is designed to test a processing route from mineral feedstock to separated rare earth products. Its results will help determine how the proposed flowsheet performs and provide technical data for engineering and cost estimates.
The commissioning advances Monte Alto’s ongoing pre-feasibility work. It does not mark completion of the study or a decision to build the project.
Stage I Moves into Bulk-Scale Testing
The Stage I pilot plant at Camaçari is designed to test physical beneficiation of rare earth feedstock from Brazilian Rare Earths’ Rocha da Rocha Province, which includes Monte Alto.
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The company has reported commissioning the beneficiation circuit and producing its first rare earth mineral concentrate. The next step is bulk-scale metallurgical test work to assess processing performance and generate data for the PFS.
Beneficiation separates and concentrates valuable minerals from mined material. The results can influence concentrate grade, recovery, equipment selection and the design of downstream processing.
The first concentrate confirms that the circuit has operated. However, a commissioning milestone does not establish sustained performance across different feed materials or operating conditions.
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The test programme must establish how consistently the plant can produce concentrate at suitable grades and recoveries. It must also generate enough material for downstream processing tests.
These results will inform the proposed flowsheet and help define the equipment and operating requirements for a larger plant. They will also provide inputs for estimating the quantity and quality of concentrate available for further processing.
For Monte Alto, the value of Stage I lies in turning initial operating results into a representative dataset that can support engineering decisions.
Stage II Targets Extraction and Separation
Stage II will extend testing beyond physical beneficiation. The planned hydrometallurgical pilot will test extraction and separation, targeting neodymium-praseodymium (NdPr) oxide, a heavy rare earth-rich HRE+ concentrate and uranium yellowcake.
These are planned pilot outputs, not products that the company has yet demonstrated at commercial scale.
Producing a mineral concentrate is only one part of the processing route. Further chemical treatment is required to extract and separate rare earth elements into individual products or defined product streams.
The Stage II programme is intended to test how those steps work together. Its results should help the company assess process performance, product quality and the engineering requirements of the proposed Camaçari refinery.
Brazilian Rare Earths has planned Stage II commissioning for the second quarter of 2027. Equipment deliveries are expected ahead of commissioning, making delivery and construction progress important milestones to monitor.
The programme will also need to establish whether the targeted products meet relevant specifications. Product samples may support customer evaluation, but qualification and commercial sales require more than successful pilot production.
Partner Funding Supports the Pilot Programme
The R$6.4 million funding package reduces the amount Brazilian Rare Earths must directly fund for Stage II.
The contribution is expected to cover approximately 59% of the stage’s capital and operating costs. The company has said the funding brings total co-funding for the Camaçari pilot facilities to R$14.6 million.
SENAI CIMATEC and partner organisations are supporting the programme. The partnership provides funding and technical collaboration as Brazilian Rare Earths develops its processing route.
For a project at the testing stage, external support can help fund the equipment and work needed to generate metallurgical data before commercial plant construction.
However, the funding relates to the pilot programme. It does not finance construction of the Monte Alto mine or a full-scale Camaçari refinery. The company will still need to establish the capital requirements and funding strategy for any commercial development.
The announcement is therefore a pilot-stage funding milestone, rather than evidence that the project’s wider financing requirements have been resolved.
Carester Links Processing Tests to a Potential Downstream Route
Carester, a French rare earth separation specialist, is supporting the separation workstream across the pilot programme. The company is also involved in engineering, design and commissioning work for the planned Camaçari refinery.
Brazilian Rare Earths has identified Carester as its heavy rare earth HRE+ concentrate offtake partner. This creates a potential link between the material produced during testing and a downstream processing route.
The partnership is relevant because the commercial value of a concentrate depends not only on its contained rare earths, but also on its quality, processing requirements and suitability for the intended customer.
The pilot programme must establish whether the proposed process can produce material that meets the required specifications. Customer qualification and the commercial performance of the route remain separate from the technical milestone of commissioning the plant.
Carester’s involvement provides a defined technical and potential commercial connection. It does not remove the need to demonstrate product quality, recovery performance or the economics of the processing route.
Co-Products Could Affect Project Economics
Brazilian Rare Earths is also evaluating recovery pathways for other elements, including uranium, scandium, niobium, titanium and tantalum.
If technically and commercially viable, additional products could contribute revenue and offset some costs associated with processing the ore. But the presence of these elements in the feedstock does not automatically make them saleable products.
Each potential co-product requires evidence of recoverability, product quality, processing cost and a credible route to market. Recovery may also add process stages, equipment and operating requirements.
The company’s August 2026 Scoping Study reported a cost benchmark of about US$21 per kilogram of NdPr equivalent for its integrated Monte Alto–Camaçari case.
Importantly, the company’s study includes the cost of uranium recovery but assumes no uranium revenue. Brazilian Rare Earths has identified potential revenue from uranium and other co-products as an opportunity to improve the project’s cost position.
That potential upside remains unproven. The pilot programme must establish whether the proposed recovery routes can deliver products at a quality and cost that support commercialisation.
The US$21/kg figure should therefore be treated as a study benchmark based on stated assumptions—not a demonstrated operating cost or a guarantee of future project economics.
What the Pilot Results Must Prove
The next phases of testing will address several questions that are central to Monte Alto’s development.
- Recovery and concentrate quality: Stage I must establish consistent beneficiation performance and provide data on grade and recovery.
- Feed variability: Testing needs to show how different feed materials affect the process and the quality of the resulting concentrate.
- Extraction and separation: Stage II must demonstrate whether the proposed route can produce the targeted rare earth products and other potential outputs.
- Product specifications: Pilot products must be assessed against the requirements of prospective customers and downstream processors.
- Engineering and costs: Metallurgical results must support equipment selection, process design and estimates of capital and operating costs.
- Scale-up: The company must determine how pilot performance translates into a larger plant, including the risks associated with operating at commercial scale.
These factors are interconnected. Concentrate quality affects downstream processing. Recovery influences product volumes. Process complexity affects equipment requirements and costs.
The pilot programme’s value will depend on how well it establishes these relationships and how effectively the results can be incorporated into the PFS.
Brazil’s Rare Earth Processing Ambitions Face a Project-Level Test
The Camaçari programme is part of Brazilian Rare Earths’ plan to connect mineral feedstocks from the Rocha da Rocha Province with downstream processing capability in Bahia.
The proposed route combines beneficiation, hydrometallurgical extraction and separation. If developed successfully, it could contribute to Brazil’s capacity to process rare earth materials domestically.
But developing a processing chain requires more than access to mineral resources. Projects must demonstrate reliable metallurgy, suitable product quality, competitive costs and the ability to finance, permit and construct the required facilities.
For Brazil’s rare earth sector, Monte Alto illustrates the technical work needed to move from a mineral resource towards a potential source of processed products. The scale of its eventual contribution will depend on the results of testing and the project’s progress through subsequent development stages.
The Camaçari pilot plant is an important part of that process. It is not, by itself, evidence that a commercial rare earth supply chain is in place.
The Next Milestone Is Integrated Processing Data
Brazilian Rare Earths has commissioned Stage I at Camaçari, produced its first rare earth mineral concentrate and secured partner funding for the planned Stage II hydrometallurgical pilot.
The next milestones are the completion of bulk-scale test work, equipment delivery and commissioning for Stage II, and the generation of integrated recovery, product-quality and engineering data for the Monte Alto–Camaçari PFS.
Those results will help the company refine its proposed processing route and assess the assumptions underpinning project costs. They will also clarify whether the targeted products and potential co-products can support the project’s commercial case.
For now, the first concentrate marks the start of a more extensive testing programme. The next stage must establish whether the process can carry that material through extraction and separation—and whether the resulting technical evidence supports further development of Monte Alto and Camaçari.
