Blast Furnace Ironmaking Technology

Timeline

1. 1100–1200North China · North ChinaFrom the Northern Song through the Jin and Yuan periods, China commonly used tall shaft furnaces for continuous ironmaking, charging charcoal blast, iron ore, and flux in layers, producing large quantities of pig iron that could be further refined into steel, far exceeding the bloomery era in output.
2. 1200–1350Persia and Anatolia · AnatoliaAround the 13th century, blast furnace or similar blast-shaft furnace technology spread via the Silk Road and Mongol Empire territories to Persia and Anatolia, where local metallurgical craftsmen absorbed the principles of continuous ironmaking, laying the groundwork for Europe's adoption.
3. 1300–1450Rhineland · RhinelandAround the 1320s, blast furnaces were built in the Rhineland, Scandinavia, and other parts of Western Europe, using water-powered bellows for blast and charcoal as fuel to produce cast iron; rising iron output supported demand for farm tools, cannon barrels, and architectural ironwork.
4. 1450–1700England · EnglandEurope developed a two-stage system producing cast iron in blast furnaces and then decarbonizing it into wrought iron in refining forges (such as the finery forge), continuously expanding the variety and output of iron goods; forestry resources and charcoal supply became limiting factors.
5. 1700–1800England · EnglandIn 18th-century England, coke successfully replaced charcoal to fuel blast furnaces, breaking through the forest resource bottleneck, causing iron output to surge and supporting railway, machinery, and steam engine manufacturing, marking the prologue of the modern steel industry.