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Open hearth furnace workers at the Zaporizhstal steel mill in Ukraine taking a steel sample, c. 2012 Tapping open-hearth furnace, VEB Rohrkombinat Riesa, East Germany, 1982. An open-hearth furnace or open hearth furnace is any of several kinds of industrial furnace in which excess carbon and other impurities are burnt out of pig iron to produce ...
Siemens-Martin open hearth furnace. The process of refining steel in a hearth, as developed by Pierre-Émile Martin, consists of smelting a mixture of cast iron and scrap or ore, then refining it by decarburization, desulfurization and dephosphorization. This method makes it possible to produce fine and alloy steels by adding noble elements.
By 1962 five of the six open hearth furnaces at the plant had been converted. [1] Conversion time of the open hearths to the oxygen-based process was around 28 days on average, with a stated capital cost of £180,000 each. [4] In 1966 the Appleby-Frodingham steelworks decided to replace the AJAX production with Linz-Donawitz (LD) converters. [3]
The Seimens furnace is also known as an open hearth furnace in Australia. Not quite sure where the material on the Catalan forge belongs, but probably under open hearth furnace as well, it seems to be a predecessor of the Seimens process. Andrewa 18:45, 7 October 2005 (UTC)
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The ends of these tubes were left open to allow air to pass through. The obstruction caused by the tubes played a role in breaking up and throwing down the tars suspended in the gas. Typically, plants using cast-iron mains and apparatus allowed 5 square feet of superficial area per 1,000 cubic feet of gas made per day.
6 open-hearth furnaces; Torrance 4 open-hearth furnaces (+2 from 1923 survey) 1 5-ton Heroult electric furnace (+ 2 tons) Portland 1 Tropenas 3-ton converter; 1 Greene electric furnace; for comparison, Pacific Coast Steel Company, biggest competitor at the time South San Francisco: 6 open-hearth furnaces; Youngstown (Seattle): 4 open-hearth ...
The second, turning out up to 400,000 tons a year, had two 100-ton secondary treatment furnaces with a continuous turning mechanism and eccentric bottom tap-holes. There were also two open hearth furnace steel mills. The first had five 100-ton ovens with an annual capacity of 300,000 tons a year, and a rolling mill for up to 450,000 tons of ...