View of a 100-ton capacity ladle of liquid steel removed from an open hearth furnace at an unknown manufacturing plant. Open hearth furnaces are used to burn excess carbon and other impurities out of pig iron, an intermediate product of smelting iron ore, to produce steel. This photograph is one of a set of fourteen stereographs detailing the production of iron and steel by various processes.
“100-Ton Capacity Ladle of Liquid Steel from Open Hearth Furnace Pouring into Ladle.” Underwood & Underwood, n.d. Underwood & Underwood Stereographs of Manufacturing Industries. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/x920fw85p.
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