De qué está hecho alto horno
A shaft furnace for smelting pig iron.
- Fuelle — tiene como parte. Air was blown in by bellows, later by blowers.
- Coque — utiliza. The fuel and reducing agent is coke (formerly charcoal).
- Carbón vegetal — utiliza. Before coke, blast furnaces ran on charcoal.
- Piedra — está hecho de. The shaft of a blast furnace is stone.