Eramet Commits $350M to Expand World’s First Industrial DLE Plant

Eramet’s Centenario-Ratones plant, the first fully integrated industrial-scale direct lithium extraction facility operating outside China, has pushed to 90% of its 24,000 t/y nameplate capacity, and the French mining group is now committing roughly US$350 million to make it bigger.

That combination matters. A direct lithium extraction (DLE) plant that actually runs at industrial scale is still a rarity, and Eramet has hit its capacity milestone and announced an expansion in the same breath. Together they form a proof-of-concept moment for a technology the rest of the lithium industry has been watching with a mix of hope and scepticism.

There is a policy layer too. The expansion’s financial logic leans on Argentina’s new investment incentive regime, which makes this as much a story about where capital flows in South America as it is about one company’s capital plan.

Here is what the milestone and the money actually tell you about where DLE goes from here: whether Eramet’s bet is paying off, what the expansion means for the lithium triangle’s competitive map, and what still has to break right before the 35,000 t/y target is secured.

A world-first DLE plant hits its stride, then doubles down

Start with the operational fact, because everything else rests on it. Centenario-Ratones, located at around 4,000 metres elevation in Argentina’s Salta province, reached approximately 90% of its 24,000 t/y lithium carbonate equivalent (LCE) nameplate capacity in June 2026, according to Eramet. The plant is guiding for 17,000-20,000 t of LCE production across 2026, with full capacity targeted by year-end.

Jean-Baptiste Hogard, Director of Eramet’s Lithium Business Unit, confirmed the plant reached roughly 90% of nameplate capacity in June 2026 and said the objective is to operate close to 100% by the end of 2026.

Why does a capacity figure warrant this much attention? Because no fully integrated DLE plant at this scale has run outside China before. That makes Centenario-Ratones a data point the entire brine industry is reading, not just another mine ramping up.

Now the expansion. Eramet is committing approximately US$350 million to add around 11,000 t/y of LCE, lifting total capacity to roughly 35,000 t/y, with a final investment decision (FID) anticipated by the end of 2027. The company frames this as the first step toward a longer-term ambition of 150,000 t/y.

The timing is the signal. Eramet is backing the next phase before the existing plant has even touched 100%, which tells you its internal confidence in the technology’s reliability is already high enough to deploy fresh capital.

The cost comparison sharpens the point. The original facility carried a US$950 million price tag; the expansion costs a fraction of that because it builds on infrastructure, workforce, and permitting already in place.

What DLE at industrial scale actually means, and why Centenario-Ratones is a test case

Direct lithium extraction pulls lithium out of brine using selective sorbents or ion-exchange systems rather than the multi-month solar evaporation ponds that have defined brine mining for decades. The practical effect is speed: extraction timelines compress from months or years down to days or weeks, and the physical footprint shrinks from vast ponds to compact columns and tanks.

Sorbent-based extraction systems underpin the ion-exchange approach Centenario-Ratones uses, where selective resins capture lithium from brine and reject impurities like magnesium and calcium before the concentrated feed moves to carbonate production.

That speed and compactness are the whole pitch. But the technology arrives with genuine trade-offs that lenders and engineers have argued over for years, and Centenario-Ratones is where several of those arguments get tested in the real world.

The case for DLE in the lithium triangle

The advocates’ arguments are specific and, in the Argentine Puna’s conditions, material:

• Higher recovery rates: technical assessments from firms including Benchmark Mineral Intelligence and Wood Mackenzie report potential lithium recoveries above 70-80%, above what long-duration evaporation typically achieves in complex brines.
• Faster production cycles: bypassing evaporation cuts residence times from months or years to days or weeks, freeing up working capital otherwise locked in inventory.
• Smaller land footprint: compact tanks replace sprawling ponds, reducing land disturbance and surface brine exposure.
• Lower water consumption: tailored DLE can cut freshwater use, which carries real weight in an arid high-altitude basin.
• Better impurity control: selective capture of lithium while rejecting magnesium, calcium, and boron produces more consistent feed for downstream carbonate production.

Where the technology debate remains open

The sceptics are not fringe voices, and their concerns remain live:

• Reagent and energy costs: resins, solvents, and regeneration chemicals are expensive, and some processes are energy-hungry. At lower lithium prices, those costs can erode the recovery and speed advantages.
• Brine-specific performance: a sorbent that works in one salar may not perform economically in another, making scale-up results hard to generalise.
• Bankability: many DLE systems are proven only at pilot scale, and financiers often want multi-year operating records before treating the technology as bankable.
• Environmental trade-offs: NGOs and some researchers caution against assuming DLE is “green” by default, pointing to energy inputs, chemical supply chains, and spent-sorbent disposal.

This is exactly why the plant matters beyond Eramet’s balance sheet. The Centenario-Ratones basin holds an estimated 15 million tonnes of LCE across roughly 5,000 million m³ of brine at an average concentration of about 407 mg/L, so the resource is not the question. The question is industrial performance, and this plant’s multi-year data will become the primary reference point lenders, automakers, and rival developers use when they decide whether to back DLE at scale.

Argentina’s RIGI framework and the policy bet behind the US$350 million

The expansion’s financial model rests partly on a policy instrument Eramet has not yet secured. Argentina’s Large Investment Incentive Regime (RIGI) offers tax, customs, and foreign-exchange incentives, plus 30 years of regulatory stability, to qualifying large investments. For a capital-intensive brine project earning hard-currency revenue against partially peso-denominated costs, that FX and stability package is a significant lever.

The RIGI framework was designed specifically to attract large-scale resource investment by bundling fiscal, customs, and foreign-exchange protections into a single 30-year stability guarantee, and its terms are broad enough to apply across mining, energy, and infrastructure projects that meet the qualifying capital threshold.

RIGI offers qualifying large investments a package of tax, customs, and foreign-exchange incentives alongside 30 years of regulatory stability, the core reason Eramet cites for pursuing registration.

Here is the important caveat. As of 1 October 2026, Eramet plans to apply under RIGI for the expansion. The application has not been formally submitted or approved, and Argus Media noted in August 2026 that there is no public timeline for the RIGI application or the longer-term expansion phases. Inclusion remains pending, not granted.

The political engagement around it has been deliberately visible. Eramet CEO Christel Bories met Argentine President Javier Milei during Argentina Week in Paris to reaffirm the company’s commitment to lithium development in the country, and the expansion was presented at that level. That signals both the weight Eramet attaches to RIGI inclusion and Argentina’s interest in locking in the investment.

For you as a reader tracking the project’s economics, the stability guarantee is one of the most consequential variables in the whole model. The uncertainties that surround it are worth naming plainly:

• Submission and approval timeline, with no public schedule yet
• The administrative process itself, which could run longer than proponents hope
• Political continuity risk, since the regime rests on national legislation
• Provincial-level permitting and social licence in Salta, which interact with the national framework

Whether high-profile projects like this one actually receive RIGI terms will tell the wider resource investment community whether the framework delivers on its promise.

How Eramet’s expansion repositions the lithium triangle’s competitive map

Zoom out, and Centenario-Ratones sits in a crowded field. Several operators are scaling brine capacity across Argentina, but almost all of them are doing it with conventional evaporation rather than DLE, which is precisely where Eramet’s differentiation lives.

Argentina’s lithium competitive position among global brine producers rests on both geological and regulatory factors, with the Puna region’s high-grade salars offering lower evaporation-based production costs than many peers, a structural advantage that DLE projects like Centenario-Ratones are now layering on top of.

Arcadium Lithium runs Olaroz and Fénix on evaporation, Lithium Americas operates at Caucharí-Olaroz in Jujuy, and POSCO is developing in the Hombre Muerto area. Eramet is the only one running fully integrated DLE at industrial scale in the region.

The long-term ambition is where the stakes expand. Reaching 150,000 t/y would make Centenario-Ratones one of the largest single-source brine operations in the world, materially shifting the competitive weight of Argentine supply in the global LCE market.

The gap between ambition and execution is real, though. Moving from 35,000 t/y to 150,000 t/y depends on the technology proving out over several years and on financing and policy staying stable, and industry observers note that multi-phase brine expansions in the triangle routinely slip.

What tips the balance is demand-side interest. Automakers and battery manufacturers have signalled appetite for offtake-backed financing of DLE projects that can demonstrate ESG advantages and reliable output, which is exactly the positioning Eramet is chasing.

If Centenario-Ratones reaches and holds 35,000 t/y using DLE, the industry conversation shifts from “can DLE work at scale” to “how fast can it be replicated.” That shift would accelerate investor and offtaker interest in DLE across the entire lithium triangle.

Three variables that will determine whether the expansion delivers on its ambition

The story’s next chapter is not the announcement; it is the three questions the next 12-18 months will answer. Each carries its own uncertainty, and their alignment is what Eramet is betting on.

1. Capacity validation: does the plant reach and sustain close to 100% of its 24,000 t/y nameplate through late 2026 and into 2027, proving DLE works reliably at full industrial scale? Resolution looks like a full calendar year at nameplate without major operational setbacks.
2. Policy clarity: does Eramet secure RIGI registration, and on what terms? Resolution looks like a formal approval with the 30-year stability guarantee attached, replacing the current planning-stage status.
3. Market economics: do lithium prices support a US$350 million brownfield commitment through to FID at end-2027? Resolution looks like a price environment that keeps the expansion’s returns intact when the board makes its call.

The scale of confidence this requires is worth holding in view. The original US$950 million plant has not yet completed a full calendar year at full capacity, and Eramet is already funding the next phase on the strength of a 90% milestone.

The end-2027 FID will be read across the industry not simply as an Eramet decision, but as a verdict on whether DLE has a commercial future in the lithium triangle.

By that date, Eramet should hold roughly 12-18 months of full-capacity operating data, a resolved RIGI position, and a clearer price signal. How those three line up will decide whether the triangle’s DLE chapter moves from pilot success to industrial rollout.

For readers exploring the broader capital allocation picture across the region, our deep-dive into South American mining investment examines how policy frameworks, infrastructure gaps, and commodity cycles are shaping where resource capital is flowing across the continent in 2026.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results. Financial projections are subject to market conditions and various risk factors, and forward-looking statements are speculative and subject to change based on market developments and company performance.