Question

Answer all the questions given under the caption.

Iron and Steel

1. In the olden days iron ore was smelted in brick furnaces. Charcoal was used as fuel.
2. The iron produced was not sturdy and strong. It had to be smelted again.
3. How was the cast iron blowing cylinder later improved?
4. How did the rolling mill increases fuel efficiency in iron production?

Answer 1

1. In the olden days, iron ore was smelted in brick furnaces. Charcoal was used as fuel.
2. The iron produced was not sturdy and strong. It had to be smelted again.
3. The cast iron blowing cylinder waster improved by making it double acting, which allowed higher blast furnace temperatures.
4. The rolling mill machine, for rolling steel or any other metal into sheets, proved to be fifteen times faster than hammering wrought iron. Hot blast greatly increased fuel efficiency in iron production.