文章基本信息

标题：Preparation of Alumina from Aluminum Ash by Sintering with Sodium hydroxide
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作者：Xiaolong Li ; Xiaolong Li ; Yujing Ou 等
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.