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Highlights
Lincoln Minerals (ASX:LML) achieves high-purity battery-grade graphite from its South Australian Kookaburra Project
Independent lab testing confirms suitability of the graphite for lithium-ion battery anodes
Project aligned with Australian Critical Minerals Prospectus, advancing scoping and prefeasibility developments
Graphite-focused Lincoln Minerals Ltd (ASX:LML), listed on the ASX 200 index, has reported successful purification of graphite sourced from its Kookaburra Project located on South Australia's Eyre Peninsula. The company confirmed the graphite has achieved benchmark purity standards suitable for use in lithium-ion battery anodes, supporting the broader clean energy and critical minerals sector.
Graphite purity validated through international and local testing
Samples from the Kookaburra Project, featuring concentrate grade graphite, were processed at multiple facilities including Classifier Milling Systems in Canada and Battery Limits in Western Australia. Further purification analysis and spheronisation steps were conducted by the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and Independent Metallurgical Operations. Testing consistently produced high-purity graphitic carbon levels, aligning with globally recognised specifications for battery-grade materials.
Safe and acid-free purification process
The purification process did not involve the use of hydrofluoric acid, which is traditionally used in graphite processing but poses environmental and occupational hazards. This method significantly reduces both the complexity and cost of producing anode-grade materials. The absence of aggressive chemicals aligns with increasingly stringent regulatory and sustainability standards across global battery supply chains.
Role of graphite in lithium-ion battery production
Graphite is essential in the manufacturing of lithium-ion batteries, serving as the primary material for the anode component. It supports energy storage performance through its conductivity and structural stability. Each electric vehicle battery requires a significant quantity of graphite, exceeding the total combined mass of other battery minerals such as lithium, cobalt, manganese, and nickel.
Progress in Kookaburra’s project development and economic modelling
The Kookaburra Project's development strategy involves staged open-pit mining and a flotation-based processing approach to produce graphite concentrate for international markets outside of China. A recently released prefeasibility study outlined key project metrics including strong returns and efficient capital allocation. Lincoln Minerals is now focused on the next stages of optimisation and qualification of high-value graphite products.
National critical minerals recognition
The Kookaburra Project was listed in the updated Australian Critical Minerals Prospectus issued by Austrade. This recognition highlights the project's strategic relevance and advancement in alignment with national priorities. The prospectus serves as a key reference for identifying globally significant mining developments that support clean energy and manufacturing value chains.
Next steps for value-added product development
Lincoln Minerals is continuing its technical work, concentrating on pathways for downstream graphite applications. This includes scoping for a battery anode material processing facility in South Australia. Such development would support domestic manufacturing initiatives and reinforce Australia's role in international energy storage supply networks.
The company’s scoping study and laboratory findings serve as the foundation for further technical and economic evaluation, underpinning a decision expected at the end of the current development stage. Lincoln Minerals (ASX:LML) continues to establish its presence within the ASX 200 index through its contributions to the battery and critical minerals ecosystem.
