open-hearth furnace

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a furnace for making steel in which the steel is placed on a shallow hearth and flames of burning gas and hot air play over it

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References in periodicals archive ?
The new mill would replace the group's outdated open hearth furnaces at its Chelyabinsk tube rolling plant.
The intricate web of steelmaking that had lined the banks of the Monongahela River since the days of Andrew Carnegie--the coal barges, coke ovens, blast furnaces, and open hearth furnaces, and the rolling mills, plate mills, wire mills--were all shuttered and closed.
He opted for the Bessemer process when the industry was building open hearth furnaces and committed the company to the production of railroad rails, a narrow, erratic market that would soon level off after the completion of Canada's transcontinental lines.
Shotton steel was made by 12 open hearth furnaces which each consumed 650 gallons of heavy fuel oil per hour and each made 250 tonnes of steel in about 8 or 9 hours.
Bill Parry wrote: The workers feeding the furnaces remind me of the open hearth furnaces at Grangetown, which I helped demolish in the Sixties with a firm called Road Materials.