CleanTech validates Laguna Verde process flowsheet ahead of DFS
Aim-listed CleanTech Lithium has validated the process envisioned by the Laguna Verde prefeasibility study (PFS) to produce high-purity lithium carbonate.
The company conducted a comprehensive technical programme to optimise and refine the process flowsheet having been developed in the Laguna Verde PFS.
About 24 m3 of feed brine was processed at a Xi'an Lanshen New Material Technology pilot plant facility in Santiago, Chile, that replicated all process stages of the PFS design.
The programme culminated in the production of five kilograms of lithium carbonate with purities up to 99.75%, which was independently verified by Alex Stewart Laboratory.
The results provide further technical validation of the proposed process route from Laguna Verde brine, in Chile, through direct lithium extraction (DLE), purification and concentration, to final lithium carbonate product. In fact, CleanTech says key DLE adsorption parameters exceeded the PFS design benchmarks, providing further support for the planned 15 000 t/y plant at Laguna Verde.
"These are highly encouraging results for the Laguna Verde project. The pilot trial supports the PFS modelling under continuous pilot-scale operating conditions. This successful optimisation provides us with clear engineering improvements as we de-risk the project and move into our final design phase," says CleanTech CEO Ignacio Mehech.
CleanTech has started to prepare a definitive feasibility study on the project.
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