GreenRoc Strategic Materials PLC (LSE:GROC) shares moved up on Wednesday, after the small-cap said it has commissioned and successfully tested the graphite anode mill circuit at its active anode materials pilot plant in Denmark, marking a key processing milestone for its Amitsoq graphite project in Greenland.
The AIM-listed company said all components of the graphite mill circuit had been commissioned and tested at what directors believe is Europe’s first natural flake graphite pilot plant. The circuit includes micronisation and spheronisation lines designed to produce spherical graphite for active anode material, a precursor used in lithium-ion batteries.
GreenRoc said the full mill line can process around 100kg of graphite feedstock per day, producing a main product with a mean particle size of around 12–20 micrometres and a finer-grained by-product of around 7–15 micrometres, depending on customer requirements.
The first 100kg batch of graphite concentrate was processed through the microniser on 23 April before being run several times through the spheronisation line. GreenRoc said the initial tests were successful, with the equipment running smoothly.
Product from the initial run is being assessed at the company’s in-house laboratory, with further scanning electron microscopy imaging to be carried out at the Technical University of Denmark.
Chief executive Stefan Bernstein said the commissioning “marks a significant milestone” in GreenRoc’s plan to supply spherical purified graphite to European customers.
The only remaining part of the pilot plant is the purification line, which is in final design and equipment sourcing, with installation expected in the second half of 2026.
In London, the share was up 6.5%, changing hands at 5.1p.