open-hearth furnace

noun

(esp formerly) a steel-making reverbatory furnace in which pig iron and scrap are contained in a shallow hearth and heated by producer gas

The ends of the blooming mill and open hearth furnace buildings were crushed in by the force of the flood.

You know the cinder pits are located in the open-hearth furnace building.

The Bessemer “Converter” has, however, itself given place to the Siemens open-hearth furnace.

The terrific heat from the first nozzle caused the metal to glow under the torch as if in an open-hearth furnace.

In the most promising form of this process an acid converter and a basic open-hearth furnace are used.

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