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| Keywords: Siemens's direct reduction early furnace.png Réduction directe inventé par Carl Wilhelm Siemens Il consiste en deux cornues parallèle en fonte alimentant le laboratoire d'un four à réverbère Carl Wilhelm Siemens It consists in 2 cast-iron retorts ore hoppers feeding the laboratory of an open-hearth steel-melting furnace 1890 https //archive org/details/metallurgyofstee00howerich The metallurgy of steel p 283 Henry Marion Howe 1848-1922 other versions PD-old-70-1923 Uploaded with UploadWizard Carl Wilhelm Siemens Direct reduction Images from The metallurgy of steel by H E Howe | ||||
