Which one of the following furnaces is used to reduce iron ore to pig- iron?
A. Puddling furnace
B. Open-hearth furnace
C. Blast furnace
D. Reheating furnace
Answer:C
Which one of the following furnaces is used to reduce iron ore to pig- iron?
A. Puddling furnace B. Open-hearth furnace C. Blast furnace D. Reheating furnace