Mining, manufacturing and steelmaking are some of them.

A. Jackson has written:

'Modern steelmaking for steelmakers'

Iron ore is typically first crushed and then separated from gangue minerals through processes such as magnetic separation or froth flotation. The concentrated iron ore is then processed in a blast furnace to produce molten iron, which can be further refined into steel through different methods such as basic oxygen steelmaking or electric arc furnace steelmaking.

Steelmaking, printing, gunpowder, and compasses

what caused the steelmaking industry to boom and why?

The steel-making industry boomed mainly because of a new manufacturing technique called the Bessemer steel process. this allowed steel to be produced at a much faster pace allowing the industry to boom. :)