Apa yang sebenarnya bergerak
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.
- Materialnya
- Neodymium
- Varietasnya
- Weathered carbonatite concentrate, high in neodymium and praseodymium
- Titik awal
- Australia — Mount Weld, a 2-billion-year-old volcanic pipe whose top has been rotted by weathering into a natural concentrate
Langkah demi langkah, perbatasan demi perbatasan
Australia · Mount Weld, Western Australia dipegang oleh Lynas Rare Earths (Penambang)
Mining a natural concentrate
Open-pit mining of deeply weathered carbonatite. Weathering has already done much of the concentrating work over geological time.
Mengapa di sini: Carbonatite pipes are rare, and ones with a thick weathered cap are rarer still.
Australia · Mount Weld concentrator dipegang oleh Lynas Rare Earths (Penambang)
Flotation to a concentrate
Milled and floated to a mineral concentrate at roughly 40% rare-earth oxide.
Apa yang terjadi pada sisanya: 980 tonnes of tailings, on site, in Australia.
Mengapa di sini: Concentrate at the mine, always.
Malaysia · Fremantle to Kuantan, Malaysia dipegang oleh Lynas Malaysia (Pemurni)
First border crossing
Concentrate is shipped to Malaysia, where the plant that cracks it was built.
Mengapa di sini: 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 dipegang oleh Lynas Malaysia (Kimia)
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.
Apa yang terjadi pada sisanya: The radioactive residue is the reason this step is hard to permit anywhere, and the reason so few countries have it.
Mengapa di sini: Because someone was willing to build it and see it through.
Malaysia · Separation plant dipegang oleh Lynas Malaysia (Pemurni)
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.
Apa yang terjadi pada sisanya: Cerium and lanthanum come out too, in larger quantities than anyone wants them. Surplus light rare earths are the industry's structural problem.
Mengapa di sini: This is the hardest step in the chain and the one with the fewest operators worldwide.
China · Metal and alloy plants dipegang oleh Metal and magnet makers (Produsen)
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.
Mengapa di sini: Metal-making capacity outside China is very small. This is the step a Western mine cannot yet route around.
China · Ningbo or Ganzhou dipegang oleh Magnet manufacturer (Produsen)
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.
Apa yang terjadi pada sisanya: Machining swarf is recycled internally — magnet scrap is one of the few genuinely closed loops in this industry.
Mengapa di sini: 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 dipegang oleh Motor and vehicle manufacturers (Produsen)
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.
Mengapa di sini: Four countries, three oceans, five processing steps — from one tonne of Australian rock to the thing that makes an electric car move.
Ini adalah contoh terhitung. Contoh ini mengikuti kuantitas awal yang dinyatakan melalui hasil dan perolehan tipikal yang dipublikasikan, sehingga proporsinya dapat diperiksa; ini bukan catatan pengiriman tertentu. Fakta rute — negara mana saja, proses apa saja, dan mengapa material tersebut tidak dapat begitu saja ditangani di tempat lain — dikompilasi dari laporan publik.