Beyond Steel: The Hidden Value in Smart Magnetite Applications

While the steel industry’s transition to Direct Reduced Iron (DRI) technology creates substantial demand for premium magnetite, the hidden value of high-grade magnetite extends far beyond traditional steelmaking. From powering next-generation batteries to enabling medical breakthroughs and optimising industrial processes, magnetite’s unique properties are opening diverse, high-value markets that could transform the business case for Australian magnetite producers like Athena Resources.

The Battery Revolution: Iron Takes Centre Stage

Lithium Iron Phosphate: The Cost-Effective Alternative

In the race to electrify transport and store renewable energy, iron has emerged as an unlikely hero. Lithium iron phosphate (LFP) batteries, which use iron as a key cathode material, are rapidly gaining market share against traditional nickel and cobalt-based batteries.

The advantages are compelling. Research by John Goodenough and colleagues identified LFP batteries for their low cost, non-toxicity, and the natural abundance of iron.1 Unlike cobalt or nickel, iron is readily available and affordable, dramatically reducing both production costs and supply chain risks.2

Major automotive manufacturers have taken notice. As of September 2022, LFP batteries captured 31% of the EV battery market, with Tesla and BYD alone accounting for 68% of LFP-powered vehicles.3 The technology is particularly attractive because it eliminates reliance on conflict minerals like cobalt, which is primarily mined under concerning labour conditions.4

For magnetite producers, this represents a substantial opportunity. High-purity iron materials are essential for LFP cathode production, and as the technology scales globally, demand for consistent, reliable iron sources will grow proportionally.

Vanadium Redox Flow Batteries: Long-Duration Storage

While LFP batteries dominate short-term storage, another iron-related technology is revolutionising long-duration grid storage. Vanadium redox flow batteries (VRFBs) use vanadium ions as charge carriers, offering unique advantages for utility-scale applications.5

VRFBs can deliver over 20,000 charge-discharge cycles without degradation, far exceeding the performance of lithium-ion batteries.6 The technology is particularly suited for grid stabilisation, renewable energy integration, and backup power applications requiring 4-8 hours or more of continuous discharge.

Critically, vanadium is often co-produced from magnetite iron ores. The Western Australian government recently pledged support for a 50 MW/500 MWh vanadium flow battery project specifically to support local battery manufacturing and the emerging vanadium mining industry in the state.7 This creates a direct link between magnetite mining and the battery storage value chain.

For projects like Athena’s Byro Magnetite deposit, the presence of vanadium in magnetite ores could provide additional revenue streams beyond iron concentrate sales, positioning the project as a supplier of multiple critical battery minerals.

Iron-Air Batteries: Multi-Day Grid Storage

Perhaps the most revolutionary iron-based energy storage technology is the iron-air battery, which operates on a principle called “reversible rusting.” When it is discharged, metallic iron reacts with oxygen in the air to form iron hydroxide (rust), releasing electricity. When charging, this reaction reverses.8

Form Energy, a Massachusetts-based company backed by Bill Gates and Jeff Bezos, has commercialised this technology for grid-scale applications. Their iron-air batteries can store electricity for up to 100 hours, providing four days of continuous power at approximately one-tenth the cost of lithium-ion systems.9 10

The batteries are built from safe, abundant materials, including iron, water, and air, with approximately 80% of components sourced domestically within the United States.11 California is currently deploying a 1.5 MW/150 MWh iron-air system that will provide backup power for approximately 1,500 homes for four days.12

As these systems scale globally, they will require consistent supplies of high-purity iron metal. While current systems may use cheaper iron powder, large-scale deployment could create demand for refined iron products from premium magnetite concentrates.

Industrial Applications: Premium Performance for Specialised Processes

Dense Media Separation

Beyond energy storage, magnetite serves critical roles in industrial processing. Dense media separation (DMS) is a mature yet essential application in which magnetite’s unique properties create substantial value.

In DMS processes used in coal preparation and mineral processing, ground magnetite is mixed with water to form a dense slurry. Materials are then floated or sunk based on their density, enabling efficient separation. The key advantage is that magnetite can be recovered and recycled indefinitely using magnetic separation, dramatically reducing operating costs.13

Suppliers providing magnetite with very high purity (approximately 99% Fe₃O₄) and low water absorption can command premium pricing in this market. The reliability and recyclability of premium magnetite products make them essential for operations requiring consistent performance.

Water Treatment and Environmental Applications

High-purity magnetite also finds applications in water treatment processes, where it serves as a coagulant and contaminant absorbent. The material’s magnetic properties enable easy recovery and reuse, reducing waste and operational costs.

Radiation Shielding and Construction

Specialised construction applications, particularly in medical facilities requiring radiation shielding (such as MRI rooms), utilise magnetite aggregate in concrete. The material’s density and non-toxic properties make it ideal for applications where both performance and safety are paramount.

Medical and Healthcare Innovation

Next-Generation MRI Contrast Agents

The medical sector represents perhaps the highest-value application for ultra-pure iron materials. Researchers at MIT have developed new iron oxide nanoparticles as next-generation MRI contrast agents, potentially replacing gadolinium-based dyes that carry toxicity risks.14

These iron-based contrast agents could help avoid rare but serious side effects associated with current imaging technologies. If widely adopted, this application would create demand for extremely high-purity iron oxides, likely produced through chemical processing of premium iron concentrates.

Medical-Grade Stainless Steels

Medical device manufacturers require materials of the highest quality and consistency. Medical-grade stainless steels used in surgical instruments, implants, and hospital equipment must meet strict purity standards to avoid corrosion or adverse reactions.

Companies producing such grades can command substantial premiums. While these markets are relatively small in volume, they pay very high prices per kilogram for specialty metals, making them attractive targets for producers who can meet exacting specifications.

Strategic Implications for Athena Resources

The diverse applications for premium magnetite create multiple strategic opportunities:

Product Diversification: Rather than focusing solely on the steel market, Athena could position Byro magnetite for multiple high-value applications. If the deposit contains vanadium, it creates a direct link to the battery storage value chain.

Premium Positioning: By demonstrating the ability to produce ultra-high-purity magnetite concentrate (70.61% Fe as proven in recent testwork), Athena can target specialised industrial applications that value consistency and quality over volume.

Value-Add Processing: Exploring partnerships with battery technology companies or industrial materials processors could enable Athena to move beyond commodity concentrate sales into higher-margin specialty products.

Market Resilience: Diversification across multiple end-use markets (steel, batteries, industrial, medical) reduces exposure to any single industry’s cyclicality and creates more stable long-term demand.

The Path Forward

The transformation of iron and magnetite from bulk commodities to enabling materials for advanced technologies represents a fundamental shift in how these resources are valued. For Australian producers with high-grade deposits, the opportunity extends far beyond traditional markets.

Success requires more than just producing quality concentrate. It demands:

  • Technical marketing demonstrating product specifications for each application
  • Strategic partnerships with downstream innovators
  • Investment in characterisation and testing to prove suitability for premium uses
  • A commitment to consistent quality and supply reliability

For Athena Resources, the Byro Magnetite Project sits at the intersection of these emerging opportunities. With demonstrated capability to produce 70%+ Fe concentrate and potential for vanadium co-production, the project could serve as a supplier of critical materials across multiple high-growth sectors.

The iron revolution isn’t just about making steel differently. It’s about recognising iron’s role in the technologies that will power, store, and enable the low-carbon future. Premium magnetite producers who understand and pursue these opportunities will capture value far beyond the traditional commodity business.

Athena Resources Limited (ASX: AHN) is focused on developing its Byro Magnetite Project in Western Australia to supply premium magnetite products for sustainable steelmaking and advanced industrial applications. For more information, visit our Project Overview or contact our investor relations team.

References:

  1. Wikipedia. “Lithium iron phosphate battery.” https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery ↩
  2. Noah Chemicals (2023). “Lithium Iron Phosphate (LFP) in Batteries.” https://noahchemicals.com/blog/lithium-iron-phosphate-material-for-batteries/ ↩
  3. Ibid. ↩
  4. Visual Capitalist (2023). “4 Benefits of LFP Batteries for EVs.” https://www.visualcapitalist.com/sp/4-benefits-of-lfp-batteries/ ↩
  5. Wikipedia. “Vanadium redox battery.” https://en.wikipedia.org/wiki/Vanadium_redox_battery ↩
  6. Invinity. “Vanadium Flow Battery Energy Storage.” https://invinity.com/vanadium-flow-batteries/ ↩
  7. RenewEconomy. “Biggest vanadium flow battery in Australia promised for ailing Kalgoorlie grid.” https://reneweconomy.com.au/biggest-vanadium-flow-battery-in-australia-promised-for-ailing-kalgoorlie-grid/ ↩
  8. North Bay Business Journal (2025). “Form Energy launches new battery technology that relies on iron rust.” https://www.northbaybusinessjournal.com/article/article/iron-air-tech-form-energy-mendocino-countyh/ ↩
  9. Scientific American (2024). “Rusty Batteries Could Greatly Improve Grid Energy Storage.” https://www.scientificamerican.com/article/rusty-batteries-could-greatly-improve-grid-energy-storage/ ↩
  10. Popular Mechanics (2023). “Iron-Air Batteries Are Here. They May Alter the Future of Energy.” https://www.popularmechanics.com/science/energy/a42532492/iron-air-battery-energy-storage/ ↩
  11. Form Energy (2024). “Form Energy’s Breakthrough Iron-Air Battery Technology Sets a New Benchmark for Safety in Energy Storage Systems.” https://formenergy.com/form-energys-breakthrough-iron-air-battery-technology-sets-a-new-benchmark-for-safety-in-energy-storage-systems/ ↩
  12. Interesting Engineering (2025). “Rust-powered battery to deliver 100-hour backup in California.” https://interestingengineering.com/energy/iron-air-battery-california-grid-form-energy ↩
  13. LKAB Minerals. “Heavy media separation with Magnetite.” https://www.lkabminerals.com/product-application/heavy-media-separation/ ↩
  14. MIT News (2017). “A new contrast agent for MRI.” https://news.mit.edu/2017/iron-oxide-nanoparticles-contrast-agent-mri-0214 ↩