Effect of Fractional Precipitation on Quality of Nanostructured Alumina Produced from Black Aluminium Dross Waste
Black aluminium dross produced from a local aluminium smelting plant was used in this study. Solvothermal method was used to produce nanostructured alumina from this waste. Initial product obtained is of low quality with 86.9% Al2O3 content and mixed crystalline phases of 71% α-alumina and 29% calcium dodeca aluminate (CaO(Al2O3)6). The introduction of the fractional precipitation stage into the process helps in improving the purity of the alumina product to 96.5% and also produces 100% α-alumina crystalline phase. The study also shows that the crystallite size of the α-alumina products produced from this process is less than 100nm.
Zainal Arifin Ahmad, Muhd Ambar Yarmo, Fauziah Haji Abdul Aziz, Dr. Meor Yusoff Meor Sulaiman, Badrol Ahmad, Khairul Nizar Ismail, Nik Akmar Rejab
Y. M.S. Meor et al., "Effect of Fractional Precipitation on Quality of Nanostructured Alumina Produced from Black Aluminium Dross Waste", Advanced Materials Research, Vol. 173, pp. 24-28, 2011