MTM and Meteoric partner on rare earths processing technology

MTM Critical Metals

MTM brings Flash Joule Heating to Brazil’s Caldeira Project

Australian metal recovery firm MTM Critical Metals has partnered with Meteoric Resources to process mixed rare earth carbonate from the Caldeira Rare Earth Project in Brazil. The collaboration follows MTM’s successful proof-of-concept work using its Flash Joule Heating (FJH) process, which concentrates high-value rare earths such as neodymium, praseodymium, dysprosium, and terbium while separating out lower-value lanthanum and cerium.

The Caldeira Project in Minas Gerais is estimated to host 1.5bn tonnes of total rare earth oxides, making it one of the largest undeveloped resources globally. Meteoric already has a supply agreement with Ucore Rare Metals for at least 3,000 t/yr of neodymium, praseodymium, dysprosium, and terbium, positioning the project as a potential cornerstone of global magnet supply chains.

Broader applications of MTM’s processing technology

The FJH process represents a fast and easily deployable alternative to traditional solvent extraction, according to MTM. The company also employs the technology for the recovery of antimony and gallium, expanding its role in processing diverse critical minerals.

Meteoric’s involvement with MTM highlights Brazil’s growing importance in rare earths, as nations look to reduce dependence on Chinese exports. By combining innovative processing with large-scale resources, the partnership could redefine supply security for critical materials essential in electric vehicles, wind turbines, and defense applications.

The Metalnomist Commentary

The MTM–Meteoric partnership demonstrates how technology-led solutions are reshaping rare earths supply chains. If successful, the FJH process could become a scalable alternative to conventional separation, aligning with global efforts to secure diversified, lower-cost, and sustainable sources of rare earth materials.