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  • The Global Aluminium Industry 40 years from 1972

    aluminium industry of the early 1970s was highly integrated, since the companies with smelters were operating alumina plants to supply alumina to the smelters and bauxite mines to supply bauxite to alumina refineries. Vertical integration also extended beyond the integration of mining, refining and smelting.

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    The two of the best known processes are smelting and roasting. The two are actually different methods, but both involve heating the ore to high temperatures. Technically, any methods which consist of processing ore by heating it are called "pyrometallurgy".

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    Today in Energy. Glossary › FAQS › ... After alumina is extracted from bauxite ore, further processing called 'smelting' is necessary to convert it into aluminum. In this process, alumina is dissolved in a solution and a strong electric current is applied. This process has generally remained unchanged since its invention in 1886.

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    The two main processing stages for aluminium production are alumina refining (Bayer process ) and aluminium smelting (Hall–Heroult process ) as shown schematically in Fig. 5. The Hall–Heroult electrolytic process was adopted over a hundred years ago, and is the only process for aluminium production in commercial use today.

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  • From ore to steel – ArcelorMittal

    Processing. The steelmaking process starts with the processing of iron ore. The rock containing iron ore is ground and the ore is extracted using magnetic rollers. Finegrained iron ore is processed into coarsegrained clumps for use in the blast furnace. Coal is cleaned of impurities in a coke furnace, yielding an almost pure form of carbon.

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