Definition of open-hearth

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< openhearted

open-heart surgery >

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open-hearth
A. gas and air enter
B. pre-heated chamber
C. molten pig iron
D. hearth
E. heating chamber (cold)
F. gas and air exit

o·pen-hearth (

n-härth

) KEY

ADJECTIVE:

Designating or being a reverberatory furnace used in the production of high-quality steel.
Of or relating to the steel produced in such a furnace.

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The American Heritage® Dictionary of the English Language, Fourth Edition.
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