- a large vertical furnace for smelting iron from ore, using coke as fuel: designed so as to direct a continuous blast of air through the fuel in order to obtain a high rate of combustion.
Origin of blast furnace
First recorded in 1700–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for blast furnace
Build a smelting-house, blast-furnace, kiln for cleansing ore.Perseverance Island
In the blast-furnace all lead ores are successfully smelted.
Use of coke in blast-furnace—Abram Darby, England, about 1720.The Story of Great Inventions
Elmer Ellsworth Burns
Through the quick sparks of fire I tried to watch the blast-furnace below.'Green Balls'
Suddenly there was a rushing noise like an escape of air from some blast-furnace.Now It Can Be Told
- a vertical cylindrical furnace for smelting iron, copper, lead, and tin ores. The ore, scrap, solid fuel, and slag-forming materials are fed through the top and a blast of preheated air is forced through the charge from the bottom. Metal and slag are run off from the base