A Sustainable Green Approach towards the Production of High Purity Alumina from Waste Aluminium Dross

Solid waste encompasses various materials discarded from homes, industries and construction including organic, paper, plastic, metal, glass and hazardous waste. Recycling is crucial for environmental preservation, involving the collection, processing and conversion of waste into reusable materials, mitigating greenhouse gas emissions and conserving landfill space. Bauxite, treated with alkaline leaching, yields aluminium and derivatives. Accumulation poses environmental risks, leaching harmful substances. Despite hazards, it is a valuable alumina source. Processing is challenging; remelting with salts recovers metal. A complex method involves soda-roasting, alkali leaching and purification, with around 90% alumina recovery. Chemical recycling is a key advantage. Resulting aluminium hydroxide is primarily bayerite. The aluminium hydroxide was then put through calcinations, resulting in the formation of high purity alumina, aluminium chloride, aluminium sulphate water purifiers, steel making accelerators, building materials, refractory materials, composite materials etc. The study involved examining the characterization of SAD and its refined products through a range of analytical techniques including thermodynamic analysis, X-ray diffraction analysis, X-ray fluorescence spectroscopy, Fourier transform infrared analysis and chemical analysis respectively. The results show that aluminium dross is not only be used only to efficiently extract high purity alumina compounds, but also to effectively achieve the green disposal of toxic components in SAD and to achieve its high-value utilization and thereby avoiding stockpiling.