REG - GreenRoc Strategic - AAM Pilot Plant Update

GreenRoc Strategic MaterialsAnnouncement

29/04/2026 07:00

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RNS Number : 2975C  GreenRoc Strategic Materials Plc  29 April 2026

 

29 April 2026

GreenRoc Strategic Materials Plc

("GreenRoc" or the "Company")

 

AAM Pilot Plant Update

 

GreenRoc Strategic Materials Plc (AIM: GROC), a company focused on the
development of critical mineral projects in Greenland, is pleased to announce
that it has successfully completed the construction, commissioning, and
initial operational testing of the graphite anode mill circuit at the
Company's graphite Active Anode Materials ("AAM") pilot plant in Denmark.

 

Highlights:

·      All components of the graphite mill circuit successfully
commissioned and tested in what the Directors believe is Europe's first
natural flake graphite pilot plant.

·      The mill circuit, featuring both micronisation and spheronisation
lines, is designed to produce spherical graphite for AAM.

·      The full graphite mill line has a processing capacity of
approximately 100kg of feedstock per day, yielding both main and fine-grained
products.

·      Initial test runs with 100kg of graphite concentrate were
successful.

·      Product evaluations are being conducted at GreenRoc's in-house
laboratory and will be supplemented by SEM imaging at the Technical University
of Denmark.

·      The only part of the pilot plant remaining to be added is the
purification line, which is undergoing final design and equipment sourcing
with expected installation in H2, 2026.

 

GreenRoc's AAM pilot plant

GreenRoc is building a pilot processing plant to produce spherical purified
graphite, a precursor material to AAM, from graphite concentrate produced at
the Company's planned graphite mine at Amitsoq in South Greenland. The
complete pilot plant circuit will consist of a micronising mill line, a
spheronising mill line and a purification line. The micronising line takes the
natural graphite flakes from the ca. 95% graphite concentrate feedstock and
first mills the graphite flakes to a narrow standard size of ca 20 micrometer
(0.020mm or 20µm) using one QWJ60 mill (60cm diameter mill) with an
integrated air classifier allowing only graphite grains of a certain maximum
size to pass (see Figure 1).

 

After micronisation to a standard particle size, the graphite is passed
several times through the spheronising line, consisting of one QWJ30 shaping
mill (30cm diameter) also with a built-in air classifier, a secondary air
classifier, a cyclone, and lastly a dust filter (see Figure 2).

 

The full line is capable of processing ca. 100kg of feedstock graphite per
day, producing both a main product with a mean particle size (or D50) of ca
12-20µm and a finer-grained by-product with a D50 of 7-15µm, depending on
the customer's requirement.

 

The graphite mill lines were delivered to the Company's premises at Hoersholm,
Denmark in early March 2026 from a leading manufacturer of graphite mills in
China. Since then, GreenRoc's dedicated pilot plant team has been busy both
building the mills and also fitting electrical wiring, the controls box,
pressurised air, vents and exhaust mufflers etc. as well as conducting
individual testing of various mill components.

 

On April 23, the first 100kg of test graphite material was processed through
the microniser mill. The graphite feedstock test material being used is a -195
graphite concentrate (meaning a >95% graphite concentrate with grain size
finer than 100 mesh or 150 micrometer) which is the typical feedstock product
for making graphite AAM. After micronising the graphite particles, the
graphite was run through the spheronisation line several times.

 

 

Figure 1. The micronising mill line.

 

These initial tests have been very successful with all equipment running
smoothly. With some minor modifications over the coming week, mostly to
improve monitoring and to increase safety, the mills are expected to be ready
for test production to produce spherical graphite honoring the battery
industry's requirements and for further calibrating and optimising of the
controls.

 

The products from this initial run are being evaluated at GreenRoc's in-house
laboratory facilities, hosting both Malvern laser particle and tap-density
analysers, which will be supplemented using scanning electron microscopy
("SEM") imaging facility at the Technical University of Denmark.

Figure 2. The spheronising mill line, with various air classifiers to separate
spheronised graphite from fine-grained graphite by-products.

 

 

GreenRoc's CEO, Stefan Bernstein, commented:

"We are delighted with the successful commissioning of the graphite mill lines
at our AAM pilot plant, which we believe to be Europe's first natural flake
graphite pilot plant, marking a significant milestone in our journey to supply
high-quality spherical purified graphite to European customers. The smooth
commissioning and operation of the mills, a process which has taken less than
two months, is a testament to the dedication and expertise of GreenRoc's pilot
plant team. We look forward to optimising pilot production and advancing
towards commercial product quality."

 

**ENDS** 

 

For further information, please contact:

 

 Investor questions on this announcement         https://greenrocplc.com/link/rkERLy (https://greenrocplc.com/link/rkERLy)

 We encourage all investors to share questions

 on this announcement via our investor hub
 GreenRoc Strategic Materials Plc                info@greenrocplc.com (mailto:info@greenrocplc.com)

 Stefan Bernstein, CEO                           +44 20 3950 0724

 Cairn Financial Advisers LLP (Nomad)

 Sandy Jamieson / Louise O'Driscoll              +44 20 7213 0880

 Oberon (Broker)                                 +44 20 3179 5300

 Nick Lovering/Adam Pollock

 

 

 

About GreenRoc

GreenRoc Strategic Materials Plc is an AIM-quoted UK public company focused on
developing the Amitsoq Graphite Project in Greenland into a producing mine to
meet critical demand from Electric Vehicle ('EV') manufacturers in Europe and
North America for new, high grade and conflict-free sources of graphite.
Amitsoq is one of the highest-grade graphite deposits in the world with a
combined Measured, Indicated and Inferred JORC Resource of 23.05 million
tonnes (Mt) at an average grade of 20.41% graphite, sufficient to sustain
several decades of mining. GreenRoc received an Exploitation Licence from the
Government of Greenland on 8 December 2025, valid for 30 years.

 

The plans for the Amitsoq Project include the construction of a facility to
further process the mined graphite into active anode material - an
indispensable component of Li-batteries - which plans have independently and
positively evaluated to prefeasibility study stage.

 

GreenRoc has entered into a partnership with the Norwegian battery
manufacturer Morrow Batteries to establish a regional supply chain. The
Amitsoq Project has been designated a Strategic Project by the EU and in March
2025 it was also ESG-certified by Digbee™, an independent platform which
provides sustainability assessments for the mining industry. In October 2025,
GreenRoc signed a binding secured loan facility for EUR 5.2 million from the
Export and Investment Fund of Denmark ("EIFO"), for the financing of the
Company's work programme. In December 2025, GreenRoc, together with its
consortium partners DTU and IPU, has been granted a sum of up to DKK
10,448,826 (ca £1.2m) for its project entitled "EU-Graphite: Building
European production of graphite active anode material" ("EU-Graphite") from
the Energy Technology Development and Demonstration Programme ("EUDP"), a
Danish government funding programme.

 

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