Aluminium industry makes a considerable contribution to the world economy. A primary aluminium production obtained a level close to 46 million tons annually, while a secondary, from a recycling, app. 20 million tons annually. A secondary aluminium production in Poland is estimated at the level of 200.000 tons/year [10]. At constantly growing consumption of aluminium and its alloys the amount of wastes generated by its production is also growing. The main waste generated in the aluminium melting process are dross (depending on the applied alloys melting process the amount of dross can reach 12% of the metal charge) [1].
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