Materials of Construction, Their Manufacture, Properties, And Uses
The book Materials of Construction, Their Manufacture, Properties, And Uses was written by author Adelbert Philo Mills Here you can read free online of Materials of Construction, Their Manufacture, Properties, And Uses book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Materials of Construction, Their Manufacture, Properties, And Uses a good or bad book?
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The reducing agent serves to remove the oxygen from the oxides of iron, leaving metallic iron together with such elements as carbon, sihcon, manganese, phos- phorus, and sulphur, which are invariably present either in the ore or in the fuel used in melting. The flux, usually limestone, combines with the gangue of the ore and the ash of the fuel, producing a fusible slag which may be separated from the metallic iron. The forms of iron ore of greatest commercial importance are hematite, limonite,... magnetite, and iron carbonate. 284. Hematite. Hematite, sometimes called " red hematite " or " red iron ore," is anhydrous ferric oxide, FeaOs, containing when pure 70 per cent iron. It occurs usually in granular or massive structure, although it sometimes has a columnar formation or a brilliant scaly structure, when it is called " specular hematite." It is usually very hard and heavy, varies from black to brick red in color and often occurs as an earthy ore which is cheaply handled. An oolitic form of hematite occurs in enormous quantities in France, Lothringen, and Luxemburg.
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