Bellqvis D., Ångström S., Magnusson M., Nordhag L., Falk O., Gustavsson L., 2015, Closing the Loop – Processing of Waste By-product from Aluminum Recycling Into Useful Product for the Steel Industry, Chemical Engineering Transactions, 45, 661-666.
During melting of aluminum scrap a slag residue is formed. The slag residue, called black dross, has no industrial use and has to be landfilled. The work presented herein aims at developing a novel treatment process for the slag, converting it into a useful product for the steel industry and thereby replacing commercially available products made from virgin material. The concept consists of flash melting black dross and lime to form a synthetic slag former for treatment of high quality steel. Results from the modelling work indicate that the overall energy savings for an extended use of the developed product at the SSAB Europe Luleå site amounts to 31 GWh/y corresponding to 8 kt CO2/y, in addition to the process removing the need for landfill of around 20 kt of black dross per year with subsequent risk of leakage of toxic compounds.
