GeoCubed is a collaboration between Cornish Lithium, the innovative minerals extraction company and GEL (Geothermal Engineering Limited), the developer of the United Downs Geothermal Power Project, established to design, procure and build a pilot plant to trial Direct Lithium Extraction (DLE) technology to extract lithium from the geothermal waters, which circulate naturally at depth in the granite rock that underlies Cornwall. The £4.0 million Pilot Plant is being supported by the Cornwall and Isles of Scilly Local Enterprise Partnership (“LEP”) with £2.9 million from the UK Government’s Getting Building Fund.
DLE Technology Module
RSE can also announce that the DLE technology module, provided by GeoLith, has now arrived at our site in Darlington, UK and we are now integrating the DLE module into the pilot plant ahead of its delivery to the United Downs Geothermal Testing Facility, where the pilot plant will be commissioned by the end of March 2022.
Deep Geothermal Assay Results Confirm Expected Lithium Concentrations
In August 2021 Cornish Lithium and GeoCubed worked together to collect a bulk sample of geothermal water during the Electrical Submersible Pump test conducted by Geothermal Engineering Limited (“GEL”) at its United Downs Deep Geothermal Project (“UDDGP”). The fluid collected will primarily be used to feed the Pilot Plant for the purposes of evaluating DLE technologies.
Lithium concentrations averaged 263 mg/l over 63-hours of pumping, with a maximum grade of 296 mg/l recorded. These concentrations were in line with those obtained from an airlift test in August 2020.
In addition to the encouraging lithium concentrations, other key by-products such as caesium, rubidium and potassium were shown to be at elevated levels. Importantly deleterious elements, which can negatively impact the processing of waters through DLE technologies and the quality of the final lithium product, were exceptionally low. Magnesium levels were below 5 mg/l, transition metals such as iron were shown to be negligible, and silicon concentrations were low.
Mark Livingston, RSE Director of Products, Technology and Modular Solutions said:
Jeremy Wrathall, CEO and Founder of Cornish Lithium and a Director of GeoCubed, said:
Ryan Law, MD and Founder of GEL and a Director of GeoCubed, said:
Mark Duddridge, Chair of the Cornwall and Isles of Scilly LEP, said: