open-hearth pro-cess

open-hearth process

noun
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.

Origin:
1885–90

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World English Dictionary
open-hearth process
 
n
a process for making steel using an open-hearth furnace

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