This is the direction where materials becomes a strategic question, and it deserves to be handled factually rather than dramatically.
The number, and what it measures
The International Energy Agency's Global Critical Minerals Outlook 2025 reports that the average market share of the top three refining nations across the key energy minerals was 86 percent in 2024, up from 82 percent in 2020.
Two things are worth noticing about that figure.
It is an average across several minerals, so individual materials vary, some more concentrated and some less.
And the direction of travel is upward. Despite substantial policy attention and investment aimed at diversification during that period, concentration increased rather than decreased.
Four percentage points in four years, in the direction nobody intended. That is the useful fact, and it says something about how long this takes.
Why refining rather than mining
The distinction matters and it is frequently collapsed in public discussion.
Ore deposits are geographically spread. Several countries have significant reserves of most of these minerals. What is concentrated is the step between ore and usable material: processing, refining and separation into battery-grade or magnet-grade products.
Three reasons that step concentrated.
It is technically demanding. Separating chemically similar elements, particularly the rare earths, requires sophisticated processes developed and refined over decades. It is not a matter of building a plant and switching it on.
It is capital intensive with thin margins. Refining is a commodity business, and returns depend on scale and operating efficiency, which favours incumbents.
It carries environmental burden. Processing generates significant waste streams, and permitting is slow where environmental regulation is strict, which pushed the activity toward jurisdictions where it was easier.
So the practical constraint on diversification is not finding ore. It is building and operating refining capacity, and that requires people who know how.
What the direction covers
The scope: lithium and rare earths, mining, supply chains, recycling and circularity.
Four areas.
Mineral resources and extraction. Where materials come from and how they are won.
Processing and refining. Hydrometallurgy, pyrometallurgy and separation chemistry, which is the concentrated step.
Supply chain analysis. Mapping dependencies, identifying single points of failure, and assessing substitution options.
Recycling and circularity. Recovering materials from end-of-life products and from manufacturing scrap.
Where this sits in the domain
Critical minerals and circular materials is the eleventh and final direction in Astra Trainer's advanced materials domain, and it sits underneath most of the others: energy materials depends on lithium, nickel and graphite, electronic materials on high-purity metals, metallurgy on alloying elements, and magnets on rare earths.
It is usually scoped with the energy, climate and nuclear domain, where energy economics, markets and policy covers the geopolitical and financing layer, and with advanced manufacturing for recycling operations. For partners assessing supply risk, this direction plus supply chain and production operations is the common pairing. You can see the eleven directions here.
Recycling, and what it can honestly contribute
Recycling is frequently presented as the answer to concentration. It helps, and the honest version is more specific.
Where it works well. Manufacturing scrap is the best feedstock available: clean, known composition, concentrated at a single site. Battery gigafactories generate substantial scrap, particularly during ramp-up, and recovering it is both economic and technically straightforward relative to end-of-life material.
Where it is harder. End-of-life products are dispersed, mixed, and designed for performance rather than disassembly. Collection is the first constraint, and separation is the second.
The arithmetic limit nobody states. Recycling can only supply material that was previously put into use. While the installed stock of batteries, motors and electronics is still growing rapidly, the material coming out of the system is far smaller than the material going in. Recycling becomes a major supply source only when stocks stabilise, and that is decades away for most of these applications.
So the accurate framing is that recycling reduces future dependence and cannot close the current gap, and a workforce plan built on the opposite assumption is planning for a different decade.
What it does do immediately is create real jobs now: collection, sorting, black mass processing and hydrometallurgical recovery, which uses the same separations skills the refining problem needs. That overlap is the most useful thing in this section.
The skills that were allowed to lapse
The specific capability gap, named.
Extractive metallurgy. Getting metals out of ores and concentrates. Taught in fewer places than it was, with an ageing workforce, in many Western countries.
Hydrometallurgy and separations chemistry. Solvent extraction, ion exchange and precipitation. The core skill for both refining and recycling, and the scarcest.
Mineral processing. Crushing, grinding, flotation and concentration.
Process metallurgy at plant scale. Running these operations reliably, which is different from designing them.
Geology and resource assessment. Finding and evaluating deposits.
Each of these takes years to build. A country or company deciding to establish refining capacity is committing to a workforce program measured in the same timescale as the plant construction, and frequently discovers that later than it should.
The roles, named
Extractive and process metallurgists.
Hydrometallurgy and separations engineers. The scarcest and most central.
Mineral processing engineers.
Battery recycling process engineers. Growing quickly.
Supply chain risk analysts with materials knowledge. Distinct from general procurement, and increasingly requested.
Geologists and resource geologists.
Environmental and tailings engineers. Waste management is a licence-to-operate issue and a technical specialism.
Materials substitution researchers. Reducing or eliminating dependence on constrained elements, which is a genuine engineering route and a slow one.
Who can be trained into it
Chemical engineers. The strongest pool. Separations, mass transfer and process design transfer directly to hydrometallurgy, and the gap is the mineral and metallurgical specifics.
Chemists. Into separations chemistry and analysis.
Oil, gas and petrochemical process staff. Large-scale chemical processing experience, and the same transition route that appears in the industrial biotechnology and energy articles.
Mining operations staff. Into processing roles, already familiar with the material and the site environment.
Waste and recycling operations staff. Into battery and electronics recycling, where they understand the real input stream.
Procurement and supply chain analysts. Into materials risk work, which needs the technical layer added.
Environmental, safety and regulatory scope. Mineral processing and refining involve strong acids and bases, hazardous reagents, high temperatures and significant waste streams including tailings, and are governed by environmental permitting, water discharge limits and site safety regimes that differ by jurisdiction. Battery recycling adds fire and thermal runaway risk from residual charge. Some materials and processing technologies are subject to export control. Training builds process and materials understanding. It does not constitute permitting, environmental compliance, safety authorisation or trade advice for any facility.
What to take from this
The top three refining nations held an average 86 percent share across key energy minerals in 2024, up from 82 percent in 2020, so concentration rose during a period of concerted effort to reduce it.
The concentration is in processing and refining rather than in ore, which makes it a capability question rather than a geology one.
Hydrometallurgy and separations chemistry is the specific scarce skill, and it serves both refining and recycling, which is the most useful overlap available.
Recycling reduces future dependence and cannot close the current gap while installed stocks are still growing, and a plan assuming otherwise is planning for a later decade.
And chemical engineers, plus oil and gas process staff, are the pools that convert fastest, because the unit operations are the same ones they already know.
How concentrated is critical mineral supply?
The IEA reports the top three refining nations held an average 86 percent market share across key energy minerals in 2024, up from 82 percent in 2020. The figure is an average, so individual minerals vary.
Is the problem mining or refining?
Refining. Ore deposits are geographically spread; what concentrated is processing and separation into usable grades, because it is technically demanding, capital intensive with thin margins, and environmentally burdensome to permit.
Can recycling solve this?
It helps and cannot close the current gap. Recycling can only supply material previously put into use, and while installed stocks are still growing rapidly, output is far smaller than input. Manufacturing scrap is the best near-term feedstock.
Which skills need rebuilding?
Extractive metallurgy, and above all hydrometallurgy and separations chemistry, which serves both refining and recycling. Both take years, on the same timescale as plant construction.
Where does this fit in the domain?
Eleventh of eleven directions in Astra Trainer's advanced materials domain, sitting underneath energy materials, electronic materials and metallurgy. You can see them here.