Was tatsächlich transportiert wird
Pilbara hematite is rich enough to ship almost as it comes out of the ground. There is no flotation, no smelting, no chemistry at the mine — just crushing and screening, a private heavy-haul railway and a purpose-built port. All the transformation happens on another continent.
- Das Material
- Iron Ore
- Die Varietät
- Direct-shipping hematite fines, around 62% iron
- Wo es beginnt
- Australia — The Pilbara, where banded iron formation was laid down over two billion years ago
Schritt für Schritt und Grenze für Grenze
Australia · Pilbara, Western Australia gehalten von Rio Tinto, BHP, FMG and others (Bergmann)
Blast, load, haul
Enriched hematite is drilled, blasted and hauled — much of it by autonomous trucks and driverless trains.
Warum hier: Weathering leached the silica out of ancient banded iron formation and left almost pure hematite behind.
Australia · Mine-site plant gehalten von Miners (Bergmann)
Crush and screen. That is all.
Crushed and screened into lump and fines. No concentration is needed — the ore is already close to a saleable grade.
Was mit dem Rest geschah: Almost nothing is discarded. Compare that with copper, where 984 tonnes in 1,000 go to tailings.
Warum hier: Where the ore is good enough to ship, nobody builds a plant.
China · Port Hedland to Chinese mills gehalten von Miners and steelmakers (Händler)
Rail, port, Capesize
Trains up to 2.5 km long run to a private port, and Capesize bulkers sail to China. This is the highest-tonnage trade route on the planet.
Warum hier: The steel mills are in Asia and the ore is in Australia. The whole business is logistics.
China · Integrated steelworks gehalten von Steelmaker (Hersteller)
Sinter, coke, and a blast furnace
Fines are sintered into lumps; coking coal is baked into coke. In the furnace the carbon strips the oxygen off the iron oxide — a chemical reaction, not just heat.
Was mit dem Rest geschah: Roughly 500 kg of coking coal per tonne of hot metal, and the CO2 that comes with it. This reaction is why steel is hard to decarbonise.
Warum hier: Integrated steelworks sit next to ports and next to demand.
China · Basic oxygen furnace gehalten von Steelmaker (Hersteller)
Blowing the carbon back out
Oxygen is blown through the hot metal to burn the carbon down to a few tenths of a percent. Manganese goes in — every tonne of steel needs some — and then whatever else the grade calls for: chromium, nickel, niobium, vanadium.
Warum hier: Steel is the alloy where a dozen other materials in this atlas quietly end up.
China · Rolling mills gehalten von Fabricators (Hersteller)
Buildings, cars, rail, ships
Cast, rolled and cut. 620 tonnes of steel is roughly the frame of a mid-rise building, or five hundred cars.
Was mit dem Rest geschah: Steel made from scrap in an electric arc furnace emits a fraction of this route's carbon. How fast steel can decarbonise depends on how much scrap exists — and you cannot recycle steel that has not been built yet.
Warum hier: Two countries, one ocean, and by weight the largest thing humans move.
Dies ist ein ausgearbeitetes Beispiel. Es verfolgt eine angegebene Ausgangsmenge anhand veröffentlichter typischer Ausbeuten und Ausbringungsgrade, sodass die Verhältnisse nachprüfbar sind; es handelt sich nicht um den Nachweis einer bestimmten Lieferung. Routenfakten — welche Länder, welche Prozesse und warum das Material nicht einfach anderswo verarbeitet werden kann — sind aus öffentlichen Berichten zusammengestellt.