期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：233
期号：4
页码：042027
DOI：10.1088/1755-1315/233/4/042027
出版社：IOP Publishing
摘要：Aluminum ash is an industrial waste residue produced during alumina electrolysis and aluminum processing and casting. In the experiment, alumina powder with a purity of 98.97% was prepared by sintering with sodium hydroxide and the process conditions affecting the dissolution rate of Al2O3 from aluminum ash were studied. The best process conditions for the dissolution of Al2O3 are the sintering temperature of 700°C, the alkali-ash ratio of 1.2:1, and the time of 2h using orthogonal experiments. The phases of the aluminum ash and alumina were determined by X-ray diffraction(XRD) analysis. The chemical compositions of the aluminum ash and alumina were determined by X-ray fluorescence (XRF) spectroscopy. The microstructure and morphology of the aluminum ash and alumina were studied with scanning electron microscopy (SEM). Alumina prepared can be used as a metallurgical material.
