blast furnace summary | Britannica
https://www.britannica.com/summary/blast-furnace
WebBlast furnaces were used in China as early as 200 bc, and appeared in Europe in the 13th century, replacing the bloomery process. Modern blast furnaces are 70–120 ft (20–35 m) high, have 20–45-ft (6–14-m) hearth diameters, use coke fuel, and can produce 1,000–10,000 tons (900–9,000 metric tons) of pig iron daily.
DA: 6 PA: 90 MOZ Rank: 53