The benefits of circulation in aluminum reverberatory furnacesare well documented and include higher productivity, and reducedfuel consumption and dross generation. One popular method toachieve the benefits of circulation is electromagnetic stirring.That said, this technology has certain drawbacks preventing itsuniversal acceptance: high capital cost, high operating cost(especially power consumption and maintenance of water cooledcopper tubes), reluctance to use water in close proximity to moltenmetal, and in some cases the inability to operate through fullthickness refractory hearths. This paper describes a technologywhich amounts to the reinvention of traditional electromagneticstirring devices, effectively addressing all of the above negativeaspects of traditional systems. In this paper we will describe howthese issues are addressed and results documented in recentinstallations.
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