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Erschienen in:
2016 | OriginalPaper | Buchkapitel
Metallurgical Performance of Salt and Chlorine Fluxing Technologies in Casting Furnaces
verfasst von : Mark Badowski, Stephen Instone, Markus Hagen
Erschienen in: Light Metals 2014
Verlag: Springer International Publishing
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Gas fluxing with the addition of chlorine or salt is widely used in the Aluminium industry to remove soluble impurities and nonmetallic inclusions and to produce a dry dross with lower Aluminium content. In particular the removal of alkaline metals Na, Ca and Li is important to achieve the appropriate product quality. The metallurgical performance of this furnace treatment process determines the treatment time required. This can have a significant effect on the furnace cycle time and subsequently overall cast house productivity.This paper presents the results of an extensive production scale study conducted by Hydro Aluminium Rolled Products into the performance of furnace salt and chlorine fluxing technologies. Emphasis is placed on the following metallurgical aspects, alkaline removal kinetics, reduction rate of non-metallic inclusions and dross formation. Safety aspects and the effect of the treatment process on the furnace cycle time is also reviewed.