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  • 1
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 32 (1986), S. 1459-1465 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: This paper focuses on two aspects of smelting operation that are highly dependent on the rate of heat transfer in the molten bath. As a consequence of the elevated temperature and the corrosive nature of the fluoride mixture, the cell sidewalls are designed so that some electrolyte will freeze onto them, protecting the carbon from erosion and at the same time insulating the cell against excessive heat loss. The thickness and dynamic variation of this frozen ledge are determined by the convective heat transfer from the bath to the freeze surface.Another situation where the rate of convective heat flow exerts a subtle influence is the dissolution of aluminium oxide powder in the bath. The localized feeding of large quantities of the powder causes transient electrolyte freezing on some of the added material, hindering its dissolution and causing the formation of an alumina sludge below the molten aluminium pad.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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