The benefits of circulation in aluminum reverberatory furnaces are well documented and include higher productivity, and reduced fuel consumption and dross generation. One popular method to achieve the benefits of circulation is electromagnetic stirring. That said, this technology has certain drawbacks preventing its universal acceptance: high capital cost, high operating cost (especially power consumption and maintenance of water cooled copper tubes), reluctance to use water in close proximity to molten metal, and in some cases the inability to operate through full thickness refractory hearths. This paper describes a technology which amounts to the reinvention of traditional electromagnetic stirring devices, effectively addressing all of the above negative aspects of traditional systems. In this paper we will describe how these issues are addressed and results documented in recent installations.
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