Clean Graphite Future
Renascor Begins HF-Free Battery-Grade Graphite Processing in Adelaide, Boosting Stock
Key Points
Renascor says its HF-free PSG purification approach is intended to deliver environmental and cost advantages by reducing reagent use and handling, alongside recycling elements of the process (“prove … environmental benefits of its HF-free process through lower reagent use, recycling, and reduced handling requirements”).
Managing director David Christensen framed the milestone as “For the first time, we are operating the process under production conditions with graphite and reagents, with the objective of demonstrating the production of battery-grade graphite and generating qualification material for prospective customers.”
The current demonstration campaign is expected to continue “into the next quarter before larger operating runs begin,” with the next phase aimed at producing optimised operating data and larger-scale qualification samples.
Renascor reiterates that its Siviour Graphite Deposit is “the world’s second-largest reported Proven Graphite Reserve” and “the largest graphite reserve located outside Africa,” reinforcing the scale of its mine-to-battery positioning.
Despite the 22 June jump, one report notes the stock was “down approximately 6.67% over the past 12 months,” underscoring that the rally was coming from a weaker longer-term performance backdrop.
Renascor Resources has begun running graphite through its hydrofluoric acid-free purification plant in Adelaide, producing battery-grade spherical graphite for the first time under real production conditions. The company's shares jumped 12% to AUD 0.056 on 22 June 2026 following the announcement, according to Mining Weekly.
The milestone is a key step in Renascor's plan to build a fully integrated supply chain — from its Siviour mine on South Australia's Eyre Peninsula all the way to finished battery anode material. The company says the plant is now running across all major process systems at target settings, Finn News Network reported.
What HF-Free Processing Means and Why It Matters
Making graphite pure enough for lithium-ion batteries — 99.95% purity — has traditionally required hydrofluoric acid, or HF. HF is highly toxic and expensive to handle. China controls over 90% of the world's graphite processing and dominates this step. Renascor's approach replaces HF with a caustic bake circuit, using less hazardous reagents, according to Discovery Alert.
The environmental upside is direct. The HF-free method cuts reagent use, allows recycling within the process, and reduces handling risks. Managing director David Christensen said: "For the first time, we are operating the process under production conditions with graphite and reagents, with the objective of demonstrating the production of battery-grade graphite and generating qualification material for prospective customers."
Adelaide Plant Running, Qualification Samples the Next Target
The Adelaide demonstration plant is co-funded by the Australian Federal Government through the Modern Manufacturing Initiative. All major process systems — including the caustic bake circuit — are running at target parameters. The current campaign is designed to validate continuous performance and collect operating and cost data, ShareCafe reported.
The processing run is expected to continue into the next quarter before larger operating runs begin. Qualification samples produced during this phase will be sent to prospective battery customers. Tier-1 battery makers typically need 6 to 12 months of testing material from a specific facility before signing long-term supply deals.
Siviour Deposit Anchors a Mine-to-Anode Strategy
Renascor's processing work is backed by the Siviour Graphite Deposit, which it describes as the world's second-largest reported Proven Graphite Reserve and the largest outside Africa. The deposit sits on the Eyre Peninsula in South Australia and is suited to low-cost open-pit mining. The proposed commercial plant aims to produce 28,000 tonnes of purified spherical graphite per year.
The project previously secured a conditional A$185 million loan from the Australian Government's Critical Minerals Facility via Export Finance Australia. South Korean firm POSCO International has signed a non-binding memorandum of understanding covering potential offtake and equity investment, reinforcing the project's international commercial interest.
Stock Jumps 12% But Funding Gap Keeps Analysts Cautious
The 12% single-day share price gain came from a weak base. Renascor's stock was down roughly 6.67% over the prior 12 months, reflecting the broader slump across lithium and graphite stocks, according to Stockhead. The rally pushed the share price to AUD 0.056, with trading volume running at four times the 30-day average.
Analysts praised the technical milestone but flagged the path ahead. The company is still pre-revenue, and funding for the full commercial plant — estimated at over A$200 million — has not been secured. A Final Investment Decision is expected by year-end if the demonstration data matches projections. Bears also warn that silicon-heavy anodes and synthetic graphite could reduce demand for natural graphite before Renascor reaches full-scale output around 2027 or 2028.
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