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| View Original: | Siemens's direct reduction rotary furnace sketch.png (523x362) | |||
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| Keywords: Siemens's direct reduction rotary furnace sketch.png Réduction directe inventé par Carl Wilhelm Siemens fondé sur le principe d'un tambour rotatif Carl Wilhelm Siemens based on the revolving drum principle 1914 https //archive org/details/principlesofmeta00hioruoft Principles of metallurgy p 129 Arthur Horseman Hiorns 1849-1920 other versions PD-old-70-1923 Direct reduction Carl Wilhelm Siemens Rotary kilns | ||||
