Wat er werkelijk wordt vervoerd
This is the most-crossed border in the atlas. Rare-earth ore is mined in one country, chemically opened in a second, separated into individual elements, turned into metal and alloy in a third, made into a magnet, and only then fitted into a motor. Mining rare earths outside China solves the first step of five.
- Het materiaal
- Neodymium
- De variëteit
- Weathered carbonatite concentrate, high in neodymium and praseodymium
- Waar het begint
- Australia — Mount Weld, a 2-billion-year-old volcanic pipe whose top has been rotted by weathering into a natural concentrate
Stap voor stap, en grens voor grens
Australia · Mount Weld, Western Australia in beheer bij Lynas Rare Earths (Mijnbouwer)
Mining a natural concentrate
Open-pit mining of deeply weathered carbonatite. Weathering has already done much of the concentrating work over geological time.
Waarom hier: Carbonatite pipes are rare, and ones with a thick weathered cap are rarer still.
Australia · Mount Weld concentrator in beheer bij Lynas Rare Earths (Mijnbouwer)
Flotation to a concentrate
Milled and floated to a mineral concentrate at roughly 40% rare-earth oxide.
Wat er met de rest gebeurde: 980 tonnes of tailings, on site, in Australia.
Waarom hier: Concentrate at the mine, always.
Malaysia · Fremantle to Kuantan, Malaysia in beheer bij Lynas Malaysia (Raffinaderij)
First border crossing
Concentrate is shipped to Malaysia, where the plant that cracks it was built.
Waarom hier: The cracking and separation plant was permitted and built here rather than in Australia — a decision about chemistry, cost and permitting that took years and remains contested.
Malaysia · Kuantan, Pahang in beheer bij Lynas Malaysia (Chemisch)
Cracking it open with acid
Roasted with concentrated sulfuric acid to break the mineral apart, then leached. Thorium and uranium that came with the ore have to be separated and managed here.
Wat er met de rest gebeurde: The radioactive residue is the reason this step is hard to permit anywhere, and the reason so few countries have it.
Waarom hier: Because someone was willing to build it and see it through.
Malaysia · Separation plant in beheer bij Lynas Malaysia (Raffinaderij)
Hundreds of stages to tell them apart
Solvent extraction through hundreds of mixer-settler stages, exploiting differences in ionic radius so small they are almost invisible. Out come separated oxides: neodymium-praseodymium, lanthanum, cerium.
Wat er met de rest gebeurde: Cerium and lanthanum come out too, in larger quantities than anyone wants them. Surplus light rare earths are the industry's structural problem.
Waarom hier: This is the hardest step in the chain and the one with the fewest operators worldwide.
China · Metal and alloy plants in beheer bij Metal and magnet makers (Fabrikant)
Oxide to metal to alloy
The oxide is reduced to metal by molten-salt electrolysis, then strip-cast with iron and boron into a rapidly-quenched NdFeB alloy ribbon.
Waarom hier: Metal-making capacity outside China is very small. This is the step a Western mine cannot yet route around.
China · Ningbo or Ganzhou in beheer bij Magnet manufacturer (Fabrikant)
Making the magnet
Hydrogen decrepitation, jet milling to a few microns, pressing in a magnetic field to align the grains, sintering, machining, and a nickel-copper-nickel coating so it does not corrode. Dysprosium or terbium is diffused into the grain boundaries so it survives heat.
Wat er met de rest gebeurde: Machining swarf is recycled internally — magnet scrap is one of the few genuinely closed loops in this industry.
Waarom hier: Roughly 30% of a sintered magnet's mass is rare earth. This is where the ore finally becomes a component.
Germany · Motor and vehicle plants in beheer bij Motor and vehicle manufacturers (Fabrikant)
Into a traction motor
1.6 tonnes of magnet is on the order of two thousand car traction motors, or the generator of a single large offshore wind turbine.
Waarom hier: Four countries, three oceans, five processing steps — from one tonne of Australian rock to the thing that makes an electric car move.
Dit is een uitgewerkt voorbeeld. Het volgt een opgegeven beginhoeveelheid door gepubliceerde typische opbrengsten en rendementen, zodat de verhoudingen controleerbaar zijn; het is geen verslag van een concrete zending. Routefeiten — welke landen, welke processen, en waarom het materiaal niet zomaar elders kan worden verwerkt — zijn samengesteld uit openbare bronnen.