Aluminum Slag
Aluminum slag is a type of waste material that results from the aluminum smelting process. Slag contains a large amount of aluminum and is divided into two types: black and white slag. "White slag" contains 15-70% aluminum, while "black slag" contains 12-18% aluminum.
WHAT IS ALUMINUM SLAG?
Black slag also contains a large amount of salt. Aluminum slag has good benefits, especially considering its tensile strength, and can be even more beneficial after certain studies. Slag is a mixture of aluminum, aluminum oxide, and oxides of alloying elements; halide, carbide, or nitride compounds of these metals are also regularly encountered. Typically, the slag resulting from any aluminum process contains a large amount of metallic aluminum. This is mechanically fixed in a cellular structure of aluminum oxide, which has a tensile strength large enough to hold aluminum up to 20 times its own weight.
ALUMINUM SLAG RECYCLING
Aluminum slag recycling is a residue, a waste, that arises from two different stages of aluminum production: primary and secondary (direct) production, and recycling. Although the generally accepted belief is that the aim is to get rid of the slag during aluminum production, research has shown that slags produced and used under appropriate conditions yield considerable profits annually.
The Aluminum Slag Recycling process is applied to the aluminum slag waste to obtain aluminum metal and aluminum oxide. While white slag is mostly used during the recycling process, the aluminum oxide is separated from the aluminum metal after the process applied in a rotating drum. While the metal accumulates in the drum, the oxide is drawn in by a fan and fed into bag filters. In this way, aluminum slag is separated from the aluminum, and then aluminum oxide and aluminum metal are separated from the slag.