Noun
a furnace for smelting of iron from iron oxide ores; combustion is intensified by a blast of air
Source: WordNetblast-furnace
Perhaps the fires through which I had passed would have a purifying effect on me, just as a blast furnace burns the impurities out of steel. Clarence Thomas
As with type IV, type V Portland cement has mainly been supplanted by the use of ordinary cement with added ground granulated blast furnace slag or tertiary blended cements containing slag and fly ash. Source: Internet
By 20, he was earning a relatively good wage doing "incredibly heavy and dangerous work" in the blast furnace. Source: Internet
Epstein Economic and Social History pp. 200–201 The blast furnace appeared around 1350 in Sweden, increasing the quantity of iron produced and improving its quality. Source: Internet
Pigott, Vincent C. (1999). p. 8. The earliest evidence of the use of a blast furnace in China dates to the 1st century AD, citation and cupola furnaces were used as early as the Warring States period (403–221 BCE). Source: Internet
Graphite Blocks are also used in parts of blast furnace linings where the high thermal conductivity of the graphite is critical. Source: Internet