Blast

noun

1. A violent gust of wind.
2. A forcible stream of gas or liquid from an orifice, for example from a bellows, the mouth, etc.
3. A hit from a pipe.
4. The continuous blowing to which one charge of ore or metal is subjected in a furnace

   "many tons of iron were melted at a blast"

5. The exhaust steam from an engine, driving a column of air out of a boiler chimney, and thus creating an intense draught through the fire; also, any draught produced by the blast.