Iondrive (ASX:ION) hits 93.5% dysprosium recovery and the TEA assumption looks suddenly conservative

The original techno-economic case assumed 32.5%. Beating that by nearly threefold reshapes the magnet recovery economics.

Iondrive (ASX:ION) has delivered the kind of metallurgical result that forces investors to rebuild their model from scratch. Independent validation of its IONSolv process recovered 93.5% of dysprosium from commercial US e-waste feedstock supplied by Colt Recycling. The techno-economic analysis lodged in November 2025 assumed just 32.5%.

That is not a tidy beat. It is a near tripling of the assumption on the most supply-constrained and highest-value element in the rare earth magnet bundle. Dysprosium is what makes neodymium magnets work at temperature, and its price reflects how few places on earth can produce it outside China.

The light rare earth numbers also moved the right way. Neodymium recovery came in at 96.5% against a 95.5% TEA assumption, and praseodymium at 96.5% against 92%. Iron rejection, previously described only qualitatively, was quantified at 99.9% via solvent extraction with no measurable co-extraction of the target rare earths.

The work was done by Kingston Process Metallurgy under ProProcess Engineering, on commercially representative feedstock with higher iron and lower rare earth grade than the TEA modelled. That last point matters more than the headlines suggest.

Why the dysprosium number changes the product mix economics

The original TEA was built on a 2,000 tonne per annum modular plant with US$4.6 million in capex, generating a US$7 million NPV at a 10% discount rate, a 46% IRR and a 2.6 year payback. Those numbers were built on the assumption that Iondrive would essentially be a light rare earth recovery business with dysprosium as a rounding error.

Dysprosium spot pricing typically runs at several multiples of neodymium on a per-kilogram basis. Recovering it at 93.5% rather than 32.5% does not just add a line item. It changes the revenue split of every tonne processed and lifts the value-per-tonne of feedstock without adding meaningful capex.

The company will fold this into a revised TEA and then a Pre-Feasibility Study. We think the more interesting question is whether the modular hub-and-spoke deployment model now becomes the explicit pitch to US strategic capital.

The feedstock detail buried in the announcement

Colt Recycling supplied material with higher iron content and lower rare earth grade than the TEA assumptions. That is the engineer’s version of a worst-case sample. The chemistry held up anyway, and the solvent extraction step did the iron rejection work cleanly.

That matters because the bear case on rare earth recycling has historically been that lab results on clean feed do not survive contact with messy commercial streams. Iondrive has now run the messy version and produced numbers above the clean assumption.

The next phase moves to higher-grade pathways including OEM production scrap and end-of-life motor stators. Those streams carry more rare earth per tonne, so the economics should look better still, assuming the company can lock in non-binding discussions into firm supply.

What still has to be proven before this becomes a re-rating

The figures are unaudited leach efficiencies, not overall flow sheet recoveries. Iondrive flags this clearly in its cautionary statements, and investors should weight it. Solvent recycle performance and mass balance across the full circuit are next phase work, and a bad result there could compress the economics again.

Our concern is that the gap between a single-pass leach efficiency and a recovered, saleable rare earth oxide is where most hydrometallurgy projects discover their problems. The IONSolv selectivity story is encouraging but the next twelve months of engineering work is where the thesis is either built or broken.

The other open variable is feedstock supply at scale. Engagement with OEM scrap and motor stator counterparties is described as preliminary and non-binding. A PFS without committed feed volumes is a PFS with an asterisk.

The Investors Takeaway for Iondrive

The technical story has materially improved. A dysprosium recovery near 94% from commercial feed positions IONSolv as more than a light rare earth play, and that repositioning is exactly the kind of narrative US critical minerals capital is currently looking to fund. The hub-and-spoke modular design is also well suited to phased deployment alongside Department of Defense and Department of Energy financing programs.

The next twelve months are about converting metallurgical wins into engineering and commercial wins. A revised TEA, then a PFS supported by committed feedstock, would give the market something concrete to value rather than a recovery percentage on a slide. For investors looking at other ASX-listed critical minerals processing names, more coverage is available at stocksdownunder.

We would want to see binding feedstock arrangements emerge before the PFS lands. Without them, the modular plant story is a slideware story.