Aluminium Silicon Hypereutectic Alloys from 6063 Alloy’s Black Dross Using Silicon Lumps and Flux

Abstract

The study on the extraction of Aluminium metal from industrial waste like aluminium dross (black dross) to be used in the production of aluminium silicon hypereutectic alloy and testing the resulted hypereutectic alloy chemically, physically, and mechanically has been carried out. The amount of the black dross used undergoes pretreatment by immersion the dross samples in tap water and settled overnight to assure the maximum separation of nonmetallic, aluminium nitride, aluminium carbide and aluminium oxide, the properties of tap water used for pretreatment dross samples was recorded to see the effect of dross content on the tap water. The pretreated dross samples were dried in electric furnace at 60ₒc for 2hrs then samples of 60 gm remelted in a graphite crucible and amount of flux(sodium chloride, potassium chloride, cryolite and calcium fluoride) (1:1) is added, then different quantities of silicon lumps are added too. The graphite crucible is put in the carbolite furnace at 800ₒc for 30 minutes. The molten aluminium silicon is poured in specific moulds for the chemical and physical examination, which shows the formation of aluminium silicon hypereutectic alloys with good chemical, physical and mechanical properties. Thus the dross is a great source for both aluminium metal high grade and aluminium silicon hypereutectic alloy.