| Abstract Scope |
Due to the high energy demand of primary aluminium production, secondary routes such as aluminium dross recycling have gained importance. This study focuses on black dross, a by-product of industrial dross recovery, containing Al2O3, metal oxides, halides, and residual aluminium. Initial leaching tests were conducted using H2SO4, HNO3, and HCl to determine the most effective acid, followed by thermal treatment. Black dross samples were roasted at four temperatures, then leached with H2SO4 to extract alumina-based ceramic powders. The optimal sample, roasted at 1500 °C with suitable MgAl2O4 content, was sintered up to 1600 °C without applied pressure. Pellets (∅1.7 cm × 0.5 cm) were formed under two different loads. Sintered products were characterized via SEM, XRD, hardness (HV), and Archimedes density methods. The black dross mixed with MgO, sintered at 1600 °C, showed 31.26% shrinkage and a density of 2.65 g/cm³, confirming its potential as a ceramic material. |