Chile Advances Direct Lithium Extraction Technology at Altoandinos

Enami

Breakthrough in Lithium Recovery and Sustainability

Chilean state-owned miner Enami has reported promising results from testing direct lithium extraction (DLE) technology at its Altoandinos project, the country’s largest undeveloped lithium deposit. Eight international laboratories participated in the tests, which demonstrated a dramatic reduction in water consumption to 36m³ per metric tonne of lithium carbonate equivalent (LCE) — 55 times less than conventional evaporation pond methods. Lithium recoveries also improved sharply, rising from 42% in traditional processes to an average of 92%.

The DLE method also reduces land use, with a proposed 75,000t per year plant requiring only 10 hectares compared with 1,020 hectares for evaporation ponds. This efficiency addresses one of the key environmental challenges facing Chile’s salt lake ecosystems, which have been under increasing scrutiny from environmental groups and regulators.

Strategic Project Development with Rio Tinto

Enami plans to invest around $3 billion to develop Altoandinos in northern Chile’s Atacama region in partnership with Anglo-Australian mining giant Rio Tinto. The deposit hosts an estimated 15 million tonnes of LCE resources across the Aguilar, La Isla, and Grande salt lakes. Agreements have been secured with six indigenous communities in the region, ensuring local stakeholder involvement in the project’s advancement.

This initiative aligns with Chile’s national lithium strategy, launched in April 2023, which targets increased lithium production while safeguarding fragile salt lake ecosystems. The strategy mandates a transition from evaporation-based extraction to DLE and sets a goal of protecting at least 30% of salt lake environments.

The Metalnomist Commentary

Chile’s successful DLE test results could significantly reshape the global lithium supply chain by lowering environmental impacts while boosting yields. If scaled effectively, Altoandinos could emerge as a model for sustainable lithium production, positioning Chile as a leader in both output and ecological stewardship. The real test will be maintaining these efficiencies at commercial scale while navigating regulatory and community engagement challenges.