Recycling. Recycle of Aluminum.

In recycling of aluminum, the quality and the yield of molten aluminum at remelting are important subjects. For recycled products, secondary aluminum material used to be predominant but now compounds of 4iu minum and polymers account for the majority. This paper focuses on aluminum used beverage cans (U, 13, C.) as a typical example of recycled aluminum, and discusses the effects, etc. of pretreatment of material (paint removal by chemical method) on the molten aluminum quality and aluminum yield at remelting. The investigation results indicate that paint removal is effective for improving the molten aluminum quality, in partfeular, for reduction of impurity element titanium, as well as improving the aluminum yield.