战国液态生铁冶炼
Cast Iron Smelting
Achieved blast furnace temperatures above 1150°C by the 5th century BCE to fully melt and cast iron. The West did not master this until the 14th century — a lead of nearly two millennia.
战国液态
Scientific Principle
High-temperature metallurgy: Fe₂O₃ + 3CO → 2Fe + 3CO₂. Carbon lowers the melting point (eutectic at 1148°C).