Abstract
Slag of aluminum is a residue which results during the melting process of primary and secondary aluminum production. Salt slag of aluminum is hazardous solid waste according to the European Catalogue for Hazardous Wastes. Hence, recovery of aluminum not only saves the environment, but also has advantages of financial and economic returns. In this research, aluminum was recovered and purified from the industrial wastes generated as waste from both of State Company for Electrical and Electronic Industries (Baghdad/AlWaziriya) and General Company for Mechanical Industries (Babylon/-Al-Escandria). It was found that these wastes contain tiny proportions of other elements such as iron, copper, nickel, titanium, lead, and potassium. Wastes were recovered for green sustainability, saving energy and cost effectiveness. The method applied for recovering aluminum was pyro-metallurgical method by smelting and refining. X-Ray fluorescence spectroscopy and X- Ray diffraction techniques of the slag sample were used to determine the chemical analysis and phases, respectively. Melting experiments were conducted by using different types of fluxes (KAlF4, NaCl, KCl and AlCl3) at different percentages (0, 5, 10 %) and different melting temperatures (700, 750, 800oC). Design of Experiment (DOE) by Taguchi method, orthogonal array L9, was used in melting experiments. Melting efficiency of aluminum was equal to 84.7%. Electro-refining of aluminum was done by using anhydrous aluminum chloride and NaCl as ionic liquids at low temperature 100 ◦C in electro-refining method producing aluminum of 99% purity.
Highlights
Aluminum is the most abundant element after the oxygen and silicon in the earth’s crust
Secondary aluminum production is by electrolytic smelting by Hall Heroult technique [2]
Recycling aluminium is known as Secondary aluminum
Summary
Aluminum is the most abundant element after the oxygen and silicon in the earth’s crust (by weight). It is never been as a free metal in nature and constitutes approximately 8% of the solid earth surface. Aluminum (Al) is one of the most important metals, since its industrial production, demand for aluminum has been continuously increasing to around 53 million tons in 2014 and its application has expanded to variety of economic sectors. Extraction of aluminum involves mining of bauxite (open pit), and alumina is produced by Bayer process. Secondary aluminum production is by electrolytic smelting by Hall Heroult technique [2]. Recycling aluminium is known as Secondary aluminum. All aluminum products can be recycled after use. Recovering of aluminum is very important because of several environmental and economic
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
