April 10, 1864.—The modern process of manufacturing open hearth steel was started by PierreEmile Martin, who melted together pig-iron, scrap, and iron ore in a Siemen's regenerative furnace. Martin's ...
IN open-hearth steel-making, chemical reactions take place between the metal bath and a supernatant slag layer, and any material balance on the process demands an accurate knowledge of the masses ...
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