What blast furnace is made of

A shaft furnace for smelting pig iron.

Bellows — has part. Air was blown in by bellows, later by blowers.
Coke — uses. The fuel and reducing agent is coke (formerly charcoal).
Charcoal — uses. Before coke, blast furnaces ran on charcoal.
Stone — is made of. The shaft of a blast furnace is stone.