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By the turn of the century, most of Carnegie's steel came from vast brick ovens called open-hearth furnaces. They were the future of steel-making. In 1890 at The extreme heat eventually burned out the impurities in the iron, resulting in silvery white steel. Before the furnace was tapped and the steel poured out,
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www.pbs.org/wgbh/amex/carnegie/sfeature/mf_furnace.html
www.pbs.org/wgbh/amex/carnegie/sfeature/mf_furnace.html
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Open hearth steel furnace. United States Patent 2753171. US Patent References: Open-hearth-furnace construction - - 1769367 ...
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www.freepatentsonline.com/2753171.html
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Some text here ... Open-hearth blast furnace, U.S. Steel Company's South Works, c. 1952. ... The Electronic Encyclopedia of Chicago © 2005 Chicago Historical Society. The Encyclopedia of Chicago © 2004 The Newberry Library. All Rights Reserved. Portions are copyrighted by other institutions and individuals.
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www.encyclopedia.chicagohistory.org/pages/3638.html
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This image has no model or property release. Any commercial use requires additional clearance. (Why?) Contact your local office to see if we can clear this image for you. No resale application use without the prior permission of Time, Inc. ... Steel Worker...
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www.gettyimages.com/detail/tlp5501544/Time-Life-Picture...
www.gettyimages.com/detail/tlp5501544/Time-Life-Pictures
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(b) operating and monitoring furnaces to convert or refine pig- iron or scrap-metal to produce steel; (c) operating and monitoring furnaces to convert or refine non- ferrous metals; (d) performing related tasks; (e) supervising other workers. ... Furnace-operator, refining/steel (open-hearth furnace)
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www.ilo.org/public/english/bureau/stat/isco/isco88/8121...
www.ilo.org/public/english/bureau/stat/isco/isco88/8121.htm
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Ninety per cent of all metal—ferrous and nonferrous— fabricated and used in the United States is steel; and ninety per cent of this steel is the product of the basic open-hearth furnace.
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www.ysfbooks.com/CATALOGUE/ENGINEERING/basichearth.htm
www.ysfbooks.com/CATALOGUE/ENGINEERING/basichearth.htm
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When an open-hearth furnace is tapped a big ladle is brought into position, a workman runs a crowbar through the clay stopper holding back the molten metal, and it runs out like buttermilk from ... What slag accompanies it rises to the top as oil on water and overflows the sides when the ladle becomes full of the melted steel.
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www.catskillarchive.com/rrextra/trib0420.Html
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Britannica online encyclopedia article on open-hearth furnace (metallurgy), ...or 1,600° C) was high enough to permit melting steel for the first time, producing a homogeneous metal of uniform composition that he used to manufacture watch and clock springs. ... steel production (in steel (metallurgy): Open-hearth steelmaking;
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www.britannica.com/EBchecked/topic/429660/open-hearth-f...
www.britannica.com/EBchecked/topic/429660/open-hearth-furnace
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Regenerative blast-furnace stoves. Storage cell. Dynamite. SOLVAY Soda Process. Beginning of metallography--- SORBY. SIEMENS' Open Hearth Steel Process. Chrome steel. Tungsten tool steel. Celluloid, the first plastic.
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hilltop.bradley.edu/~rbg/el2.html
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