WordReference Random House Learner's Dictionary of American English © 2025
ˈblast ˌfur•nace, n. [countable]
  1. Metallurgya large vertical furnace for melting iron ore.

WordReference Random House Unabridged Dictionary of American English © 2025
blast′ fur′nace, 
  1. Metallurgya 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.
  • 1700–10

Collins Concise English Dictionary © HarperCollins Publishers::
blast furnace
  1. 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
'blast furnace' also found in these entries (note: many are not synonyms or translations):
Darby - bell - black copper - blow - bosh - bott - bridge - burden - bustle pipe - cast - flush - forehearth - hearth - inwall - mantle - notch - ore hearth - pig - pig iron - salamander - scaffold - scour - skip car - stock - tap - taphole - tapper - tuyère

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