Why Vanadium Supply Is Controlled by Steel Mills, Not Miners

Most of the vanadium moving through global supply chains today was never mined for its own sake. It arrived as a passenger, locked inside iron ore or dissolved in crude oil, and was recovered only because throwing it away eventually made less sense than keeping it.

That is unusual for a metal this strategically important. Copper is mined as copper. Nickel is mined as nickel. Vanadium, by contrast, reaches the market through three separate routes, each governed by a different industry, a different economic logic, and a different set of vulnerabilities. Whoever controls steel and petroleum, it turns out, effectively controls vanadium, not the people trading vanadium itself.

What follows untangles the three source pathways and explains why the economics of each make vanadium supply behave unlike almost any other industrial metal. Understand these routes and the strange behaviour of vanadium prices stops looking random.

Where vanadium actually forms: titanomagnetite and primary mining

Vanadium’s story begins in slowly cooling magma. In large layered igneous intrusions, where molten rock settles and crystallises over long geological timescales, vanadium atoms slip into the crystal structure of magnetite as the mineral forms. The result is titanomagnetite ore, a mineral system that carries iron, titanium, and vanadium together from the very beginning.

This co-mineral relationship is the reason primary vanadium mining is not really about digging up vanadium at all. It is about recovering something that was always hiding inside the iron.

Titanomagnetite resource estimation involves separating the vanadium, iron, and titanium credits that co-occur in the same ore body, a process that shapes how projects are valued and which revenue stream is treated as primary versus byproduct.

The defining characteristics of titanomagnetite deposits are worth spelling out:

• They form in layered igneous intrusions, where cooling magma allows minerals to separate and settle
• Vanadium, iron, and titanium occur together as co-minerals rather than as separate ore bodies
• Vanadium concentrates in magnetite because it substitutes directly into the mineral’s crystal lattice during cooling

The key distinction of primary mining is economic, not just geological. When an operation is built specifically to recover vanadium, the full cost of mining, beneficiation, roasting, and leaching falls on the vanadium output alone. There is no steel mill or refinery next door absorbing those costs. That single fact shapes everything about how competitive these mines can be.

The two primary operations that define the benchmark

Two operations dominate the primary category. The largest and most significant titanomagnetite-hosted vanadium resource on the planet is the Bushveld Complex in South Africa. Bushveld Minerals reported nine-month 2024 production of 2,546 metric tons of contained vanadium, against full-year group guidance of 3,800-4,000 metric tons.

Outside South Africa, the standout is the Maracás Menchen mine in Brazil, operated by Largo Inc., where ore is targeted specifically for its vanadium yield rather than recovered as a byproduct. Maracás Menchen produced 9,264 tonnes of vanadium pentoxide (V₂O₅) equivalent in 2024, followed by 9,150 tonnes in 2025. Both operations produce high-purity V₂O₅ as a primary product, which sets their material quality apart from slag-derived output.

The USGS Mineral Commodity Summaries 2026 puts world mine production at 118,000 tonnes of vanadium in 2024, a figure that makes the combined output of the world’s two most important primary operations look structurally marginal against the broader supply base.

Now weigh those numbers against the total. The USGS Mineral Commodity Summaries 2026 put world mine production at 118,000 tonnes of vanadium in 2024. The combined output of the world’s two most important primary vanadium operations fits inside a rounding error of that figure. Primary mining, in other words, is structurally marginal. It is not the backbone of supply, and because the right igneous intrusion is genuinely rare, new primary supply cannot simply be conjured up when demand calls for it.

Primary vanadium development outside the Bushveld Complex and Brazil illustrates the geological scarcity argument directly: only a small number of jurisdictions host the layered igneous intrusions where titanomagnetite ore bodies of commercial scale can form.

How steel slag became vanadium’s dominant delivery mechanism

To understand where most vanadium comes from, you have to look inside a basic oxygen furnace (BOF), the vessel where molten iron is turned into steel. When vanadium-bearing iron is processed here, high-velocity oxygen jets are blasted into the melt to strip out unwanted elements.

Vanadium has a strong driving force for oxidation, stronger even than phosphorus. So the oxygen preferentially seizes it, converting it into stable oxides at the boundary between the molten metal and the floating slag layer above.

Here is the pivotal detail. Once oxidised, vanadium barely dissolves in liquid steel. It has a high affinity for the solid oxide phases in the slag instead, so it migrates upward and concentrates there rather than staying in the finished steel.

That behaviour is captured by the partition coefficient, the ratio describing how strongly an element distributes into slag versus metal. For vanadium, that ratio runs from 7.6 to 43.4 in favour of the slag. The conditions inside the furnace determine where in that range you land.

That range is not an abstraction. For every tonne of vanadium ending up in steel, somewhere between 7.6 and 43.4 tonnes report to slag. Byproduct recovery is not incidental at steelmaking scale. It is structurally inevitable.

China’s structural grip on slag-derived supply

Because slag recovery scales with steel output, the country that makes the most steel captures the most vanadium. That country is China, and the dominance is not a geopolitical strategy so much as an arithmetic consequence.

More than 86% of China’s vanadium production comes directly from vanadium slag, and the country produced 84,000 tonnes of vanadium in 2024, according to the USGS Mineral Commodity Summaries 2026.

China accounts for roughly 72% of global mine production, with about 71% of its domestic output coming from the top five producers using slag technology. Chinese vanadium slag output reached 1.838 million tonnes in 2023 on a standard 10% vanadium basis. Globally, steel slag pathways deliver around 70% of all vanadium supply.

China’s vanadium policy operates through steel standards, environmental enforcement, and slag processing incentives rather than direct commodity management, which is why price moves that look like supply shocks are often administrative decisions made in Beijing’s industrial bureaus.

What this means for you is stark. The majority of the world’s vanadium is not controlled by vanadium producers at all. It is controlled by steel mills, whose output rises and falls with construction and manufacturing cycles that have nothing to do with vanadium demand. When steel production softens, byproduct vanadium supply softens with it, regardless of how badly the market wants the metal. And Chinese co-producers hold latent slag reprocessing capacity that can be switched on without new mines if prices rise enough to justify it, making the supply response asymmetric.

Petroleum residues: the third source and why it is shrinking

The third pathway is the smallest and the most exposed. Vanadium occurs naturally in heavy crude oils, with Venezuelan and Iranian crudes among the richest sources. During refining and catalytic cracking, that vanadium accumulates in spent catalysts and heavy fuel oil residues, which can then be reprocessed into commercially usable vanadium compounds.

Like slag, this is a byproduct stream. But its parent industry is petroleum, not steel, so the volume of vanadium available depends entirely on how much heavy crude the world is refining.

The three sub-sources feeding this pathway are:

• Spent catalysts from catalytic cracking units
• Fuel oil residues left after processing heavy crude
• Utility fly ash from burning residual fuels

The United States illustrates both the mechanism and the fragility. American secondary vanadium production relies entirely on these waste materials, contributing over 5,700 tonnes of supply in 2023. Globally, petroleum residues account for only about 5% of vanadium supply.

This supply pathway cannot be expanded by any decision made inside the vanadium market. It can only grow or shrink based on choices made in the petroleum industry.

That is what makes it structurally vulnerable. Refinery reconfigurations, a shift toward lighter crudes, and broader decarbonisation are all reducing the volume of heavy residues being processed. The pathway is being squeezed from both ends, from the feedstock side and the processing side. For anyone tracking long-term availability, the implication is uncomfortable: this is supply that will not be replaced by new capacity if energy transition erodes heavy crude refining. It will simply, and quietly, disappear.

Why most vanadium is a byproduct and what that means for supply

Bring the three pathways together and a single economic argument emerges. Roughly 75% of global vanadium supply, around 70% from steel slag plus about 5% from petroleum residues, is tied to industries that do not primarily care about vanadium at all.

The consequence is a cost asymmetry that primary miners cannot beat. Chinese steel mills allocate the vast bulk of their mining, capital, and operating costs to steel. Recovering vanadium from slag is treated as a waste-stream upgrade with only marginal incremental cost, which parks slag-derived material permanently in the lowest quartile of the cost curve.

Primary miners have no such luxury. They shoulder the full capital intensity of dedicated mining, beneficiation, roasting, and leaching, then have to compete against material produced at near-zero marginal cost. During price downturns, primary projects face curtailment while steel-linked slag producers keep going as long as steel stays profitable.

This is why supply cannot respond cleanly to vanadium demand. The largest producers only lift output when steel demand rises, not when vanadium demand rises. Primary miners can respond, but only once prices clear their economic thresholds, which rules them out at low or moderate price levels.

The 2018 price spike proves the point. Consider the causal chain:

1. Strict environmental inspections shut down several Chinese vanadium-producing steel mills, cutting output
2. China’s new rebar standard (GB/T 1499.2-2018) suddenly raised the vanadium intensity required in structural steel
3. Aggressive restocking collided with tightened supply, sending prices vertical
4. Previously suspended capacity restarted in response to the high prices
5. Prices collapsed as that capacity returned and compliance gaps in the standard emerged

V₂O₅ prices ran from roughly US$2.50/lb in 2016 to over US$30/lb by late 2018, with ferrovanadium exceeding US$125/kg, before crashing back down.

Notice what drove all of it. A steel standard and environmental policy, not a vanadium supply shortage. That is your analytical framework for every future price move: ask first what is happening in steel, then in petroleum, and only then consider primary mine supply. The answer to “why did vanadium prices move?” almost always starts in a different industry entirely.

What the byproduct structure means for vanadium’s future availability

The tension now building is straightforward to state and hard to resolve. Demand is heading toward batteries, while supply still comes from steel mills and refineries. Currently, 85-90% of vanadium demand sits in the steel sector, used as a micro-alloy in high-strength low-alloy (HSLA) steels at 0.03-0.10% vanadium content, while less than 2% goes to vanadium redox flow batteries (VRFBs), the large-scale energy storage systems increasingly used to balance renewable power grids.

VRFB demand is forecast to grow at a compound annual growth rate of roughly 56.7% through 2030, yet batteries currently absorb less than 2% of vanadium supply. The scale of that mismatch is the defining question for the market.

To avoid shortages, global supply may need to expand by around 6.9% per year, requiring an additional 15,000-20,000 tonnes of V₂O₅ annually by 2030. The problem is that the supply system was never designed to answer battery-market signals. It was built to harvest value from steel and petroleum waste streams.

Three structural vulnerabilities sit inside that model:

• Steel-cycle dependency: most supply rises and falls with steel output, not vanadium demand
• Petroleum transition risk: residue supply erodes as heavy crude refining declines
• Geographic concentration: supply and processing lean heavily on China, Russia, and South Africa

Latent Chinese slag capacity offers a partial release valve. Producers there could expand recovery relatively quickly and cheaply if prices justify the reprocessing investment. But that is a price-threshold reaction, not a planned expansion, and it depends on steel economics cooperating.

History shows how fast this system can break. The 2015 closure of South Africa’s Evraz Highveld Steel and Vanadium removed an estimated 10-15% of global feedstock from a single operation, eventually helping to tighten the entire market. If steel production weakens just as VRFB demand accelerates, the gap could open faster than primary mining can fill it. The future of vanadium supply, in the end, will be decided in the steel industry, the petroleum industry, and by whether prices ever rise high enough to reward the full cost of primary mining. None of those decisions belong to the vanadium market itself.

Reading the vanadium market through its supply structure

You now have a lens that most market commentary lacks. When vanadium prices move, the explanation almost never begins in the vanadium market. It begins in steel policy, petroleum throughput, or an environmental ruling that shutters a slag operation.

That reframes how you read the news. A rebar standard change in China, a curtailment at a major slag producer, a shift in how much heavy crude the world refines: each is a vanadium supply event, even when it is reported as a steel or energy story. The 2018 run from US$2.50/lb to over US$30/lb remains the cleanest illustration of that truth.

Investors translating the supply structure analysis into portfolio decisions will find our full explainer on ASX vanadium stocks useful; it maps how the byproduct cost dynamic and battery demand growth interact with equity valuations and project-stage risk.

The deeper point is that vanadium is one of the rare industrial metals where the supply decision is made by producers who do not primarily care about vanadium. That makes supply-and-demand analysis fundamentally different here, and the same logic applies to other metals recovered as co-products from large industrial processes.

The coming decade will test a supply structure that was built for an entirely different purpose. Whether primary mining can grow enough to supplement the byproduct base will decide whether rising battery demand becomes a manageable stretch or a genuine shortage.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results. Financial projections are subject to market conditions and various risk factors.