| Abstract Scope |
Production of deoxidation granules for steel metallurgy is done by re-melting aluminum scrap in a two-chamber furnace. In order to determine the amounts of aluminum, non-metals and foreign metals in mixed scrap of an Austrian Al-smelter, the representative sampling of Al-scrap is carried out first. Subsequently, the obtained sample is divided manually into the different fractions. These are on the one hand the fractions of Al and foreign metals like Cu, Fe, Zn and brass, and on the other hand non-metals such as plastics, glass, wood and fines. Accurate characterization of the separated fines is done by TGA, TC, XRF and XRD analysis. Furthermore, melting experiments of the scrap on laboratory scale into a primary aluminum melt are conducted according to the industrial process. The results are of great importance, since the quality of the scrap influences the melting process significantly and the purchasing department can adjust accordingly. |