Open-hearth furnace
noun
1.
a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
noun
1.
(esp formerly) a steel-making reverbatory furnace in which pig iron and scrap are contained in a shallow hearth and heated by producer gas
noun
1.
a process for making steel using an open-hearth furnace
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