ما الذي يتنقّل فعلاً
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.
- المادة
- Iron Ore
- النوع
- Direct-shipping hematite fines, around 62% iron
- حيث يبدأ
- Australia — The Pilbara, where banded iron formation was laid down over two billion years ago
خطوة خطوة، وحدًّا حدًّا
Australia · Pilbara, Western Australia بحوزة Rio Tinto, BHP, FMG and others (شركة التعدين)
Blast, load, haul
Enriched hematite is drilled, blasted and hauled — much of it by autonomous trucks and driverless trains.
لماذا هنا: Weathering leached the silica out of ancient banded iron formation and left almost pure hematite behind.
Australia · Mine-site plant بحوزة Miners (شركة التعدين)
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.
ما الذي جرى للباقي: Almost nothing is discarded. Compare that with copper, where 984 tonnes in 1,000 go to tailings.
لماذا هنا: Where the ore is good enough to ship, nobody builds a plant.
China · Port Hedland to Chinese mills بحوزة Miners and steelmakers (متداول)
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.
لماذا هنا: The steel mills are in Asia and the ore is in Australia. The whole business is logistics.
China · Integrated steelworks بحوزة Steelmaker (الشركة المصنّعة)
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.
ما الذي جرى للباقي: 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.
لماذا هنا: Integrated steelworks sit next to ports and next to demand.
China · Basic oxygen furnace بحوزة Steelmaker (الشركة المصنّعة)
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.
لماذا هنا: Steel is the alloy where a dozen other materials in this atlas quietly end up.
China · Rolling mills بحوزة Fabricators (الشركة المصنّعة)
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.
ما الذي جرى للباقي: 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.
لماذا هنا: Two countries, one ocean, and by weight the largest thing humans move.
هذا مثال تطبيقي. يتتبّع كمية ابتدائية محددة عبر معدلات عائد واسترداد نموذجية منشورة، مما يجعل النسب قابلة للتحقق؛ وهو ليس سجلاً لشحنة فعلية. وقد جُمعت وقائع المسار — الدول، والعمليات، وأسباب تعذّر معالجة المادة في مكان آخر — من تقارير متاحة للعموم.