DICT.TW Dictionary Taiwan
blast furnace
鼓風爐
Blast n.
1. A violent gust of wind.
And see where surly Winter passes off,
Far to the north, and calls his ruffian blasts;
His blasts obey, and quit the howling hill. --Thomson.
2. A forcible stream of air from an orifice, as from a bellows, the mouth, etc. Hence: The continuous blowing to which one charge of ore or metal is subjected in a furnace; as, to melt so many tons of iron at a blast.
Note: ☞ The terms hot blast and cold blast are employed to designate whether the current is heated or not heated before entering the furnace. A blast furnace is said to be in blast while it is in operation, and out of blast when not in use.
3. The exhaust steam from and 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.
4. The sound made by blowing a wind instrument; strictly, the sound produces at one breath.
One blast upon his bugle horn
Were worth a thousand men. --Sir W. Scott.
The blast of triumph o'er thy grave. --Bryant.
5. A sudden, pernicious effect, as if by a noxious wind, especially on animals and plants; a blight.
By the blast of God they perish. --Job iv. 9.
Virtue preserved from fell destruction's blast. --Shak.
6. The act of rending, or attempting to rend, heavy masses of rock, earth, etc., by the explosion of gunpowder, dynamite, etc.; also, the charge used for this purpose. “Large blasts are often used.”
7. A flatulent disease of sheep.
Blast furnace, a furnace, usually a shaft furnace for smelting ores, into which air is forced by pressure.
Blast hole, a hole in the bottom of a pump stock through which water enters.
Blast nozzle, a fixed or variable orifice in the delivery end of a blast pipe; -- called also blast orifice.
In full blast, in complete operation; in a state of great activity. See Blast, n., 2. [Colloq.]
blast furnace
n : a furnace for smelting of iron from iron oxide ores;
combustion is intensified by a blast of air