After recycling scrap aluminum, because the aluminum content in the waste products varies, it is almost impossible to restore it to pure aluminum. Even if it is feasible, the cost must be very high. And our aluminum ingots generally refer to aluminum ingots for remelting. With a content of 99.7%, it can be considered a pure substance. Therefore, scrap aluminum is generally used to directly process aluminum alloys or cast into aluminum rods after being quenched and tempered.
Since the raw materials of recycled aluminum are mainly scrap aluminum materials, scrap aluminum includes scrap aluminum castings (mainly Al-Si alloy), scrap aluminum forgings (Al-Mg-Mn, Al-Cu-Mn and other alloys), and profiles (Al-Mn, Al-Mg and other alloys) scrap cables (mainly pure aluminum) and other various materials, sometimes even mixed with some non-aluminum alloy scrap parts (such as Zn, Pb alloy, etc.), which gives The formulation of recycled aluminum brings great inconvenience.
How to formulate this kind of raw materials with multiple complex components into recycled aluminum ingots with qualified composition is the core issue of recycled aluminum production. The first step in the recycled aluminum production process is the sorting and classification process of scrap aluminum.