Nearly nine-tenths of the lithium ended up in the final concentrate
In the quiet arithmetic of mineral extraction, a pilot program has demonstrated that Dense Media Separation can recover nearly nine-tenths of the lithium present in raw ore — a result that, if it holds at scale, could meaningfully ease one of the quieter bottlenecks in the world's energy transition. Lithium has become as foundational to modern civilization as steel or copper, yet the methods for pulling it from rock have long surrendered a troubling fraction of what the earth offers. This test, producing high-grade spodumene concentrate at 6.1% lithium oxide, suggests that a physical sorting technique older than the battery age may have new work to do.
- The world is projected to need three to four times more lithium by 2035 than it currently produces, and conventional processing methods routinely lose 20–30% of available lithium to waste streams.
- A pilot program using Dense Media Separation — which sorts minerals by exploiting differences in density rather than chemical leaching — achieved an 89% lithium recovery rate, a meaningful leap beyond industry norms.
- The resulting spodumene concentrate graded at 6.1% lithium oxide, high enough to feed directly into conversion plants producing battery-grade lithium carbonate or hydroxide, reducing downstream cost and energy use.
- The critical uncertainty now is scale: precise density control and high-volume ore handling introduce compounding challenges that a small pilot cannot fully anticipate.
- If the method proves scalable, it could accelerate adoption across lithium mining operations globally, easing supply constraints for EV and grid-storage battery manufacturing without dramatically increasing the environmental footprint of extraction.
A pilot processing program has shown that Dense Media Separation can extract lithium from ore with unusual efficiency — recovering 89% of available lithium and producing a concentrate grading 6.1% lithium oxide. The result matters because lithium has become essential infrastructure, underpinning every electric vehicle battery, grid-scale storage system, and consumer device. Yet the industry has long accepted that a significant share of the mineral is simply lost during processing, stranded in tailings and waste streams.
Dense Media Separation works on a straightforward physical principle: minerals of different densities behave differently when suspended in a calibrated liquid medium. Heavier minerals sink; lighter ones float. Spodumene, which holds most of the world's lithium, responds well to this approach. Crucially, the method avoids the chemical intensity and water consumption of conventional leaching.
The 89% recovery rate represents a step forward over the 70–80% typical of conventional routes. The 6.1% lithium oxide grade means the concentrate can feed directly into conversion plants without extensive further refinement — reducing both cost and energy consumption along the supply chain.
What the pilot cannot yet answer is whether the method holds at industrial scale. Precise density control and reliable separation become harder as throughput grows. The logical next step is a larger demonstration plant processing hundreds or thousands of tons. If that succeeds, the implications are substantial: even modest improvements in recovery rates, applied across the industry, could ease the supply constraints bearing down on a world that will need far more lithium within the decade.
A pilot processing program has demonstrated that Dense Media Separation—a technique that sorts minerals by weight—can extract lithium from ore with unusual efficiency. The test run produced spodumene concentrate grading 6.1% lithium oxide, with 89% of the available lithium successfully recovered from the sample material.
The achievement matters because lithium is now essential infrastructure. Every electric vehicle battery, every grid-scale energy storage system, every phone and laptop depends on it. The world needs vastly more lithium than it currently produces, and the methods used to pull it from rock have not changed dramatically in decades. Most operations lose significant quantities of the mineral during processing—it ends up in tailings, in waste streams, economically stranded.
Dense Media Separation works by exploiting a simple physical property: different minerals have different densities. By suspending ore in a carefully calibrated liquid medium, heavier minerals sink while lighter ones float. Spodumene, the mineral that contains most of the world's lithium, has a density that makes it responsive to this approach. The pilot program tested the method on a sample designated CV5 and found that it could reliably separate and concentrate the spodumene without the chemical intensity or water consumption of conventional leaching.
The 89% recovery rate is the significant number here. It means that of all the lithium present in the ore fed into the process, nearly nine-tenths ended up in the final concentrate. The remaining 11% represents loss—some inevitable, some perhaps recoverable with further refinement. For comparison, many conventional processing routes achieve recovery rates in the 70-80% range, making this result a meaningful step forward.
The 6.1% lithium oxide content in the concentrate indicates a high-grade product. Lithium oxide is the standard measure of lithium concentration in ore and concentrates. A concentrate at this level is suitable for direct feed into conversion plants that transform it into lithium carbonate or lithium hydroxide, the chemical forms used in battery manufacturing. The higher the grade, the less downstream processing is required, which reduces cost and energy consumption.
What remains unclear from the pilot is whether the method scales. A successful small-scale test does not guarantee success at industrial volume. Dense Media Separation requires precise control of liquid density, careful handling of large ore volumes, and reliable separation of the mineral product from the medium itself. These challenges multiply as throughput increases. The next phase would typically involve a larger pilot or demonstration plant, processing hundreds or thousands of tons rather than laboratory quantities.
If the method does scale, the implications for lithium supply are substantial. The world is projected to need three to four times more lithium by 2035 than it currently produces. Improving recovery rates across the industry—even modestly—would ease supply constraints and reduce the environmental footprint of mining. Dense Media Separation is not new technology, but its application to spodumene processing at this efficiency level appears to be.
A Conversa do Hearth Outra perspectiva sobre a história
Why does an 89% recovery rate matter? Isn't most of the lithium already being extracted?
No. Most operations lose 15-30% of the lithium in their ore. That's not a small margin when you're talking about a mineral the world desperately needs. If you can recover 89% instead of 75%, you're getting 18% more product from the same ore body.
And the 6.1% lithium oxide—is that good?
It's very good. It's a concentrate, not raw ore. Raw spodumene ore might be 1-2% lithium oxide. Getting it to 6.1% means you've already done most of the heavy lifting before it leaves the mine site.
So why isn't everyone using this method already?
Dense Media Separation isn't new. But scaling it up is hard. You need to control the density of the liquid medium precisely, handle massive volumes of ore, and then separate the mineral from the liquid afterward. All of that gets exponentially more difficult at industrial scale.
What happens next?
They'll probably build a larger pilot plant. If it works at 500 or 1,000 tons per day, then you start thinking about commercial deployment. But that's years away.
And if it does work at scale?
Then lithium supply becomes less constrained. Mining companies can extract more from existing ore bodies, which means less new mining, which means less environmental disruption. It's not revolutionary, but it's the kind of incremental efficiency gain that actually matters in commodities.