矿产综合利用Issue(6)：42-45,4.
由膨润土制取氧化铝晶须试验研究
Experimental Research of Preparation of Alumina Whiskers from Bentonite
黄伶俐 1于少明 1程磊磊 1潘晓峰1
作者信息
- 1. 合肥工业大学化工学院,安徽合肥230009
- 折叠
摘要
Abstract
The preparation method of alumina whiskers from bentonite was studied. The appropriate process route was determined. The structure, composition and morphology of ammonium aluminium carbonate hydroxide whiskers and alumina whiskers were analysed and characterized by XRD, SEM and TG. The results showed that in the relatively good acid leaching condition, the montmorillonite in the bentonite was almost decomposed, among which those soluble components such as aluminum were dissolved in the acid and the silicon which was changed into the active silica was maintained in the acid leaching residue with gangues such as quartz. Through iron precipitation by potas-sium permanganate, the content of iron in the acid leaching filtrate was obviously decreased. The removal rate of iron was more than 96%. Using the hydrothermal synthesis of precursor of ammonium aluminium carbonate hydroxide whisker,at the temperature of 900 - 1100℃, after being calcined for 4h, different crystal structure of alumina whisker could be obtained with the diameter about 500nm, the length about l0μm and the ratio of length to diameter about 20.关键词
膨润土/碱式碳酸铝铵晶须/氧化铝晶须Key words
Bentonite/ Ammonium aluminium carbonate hydroxide whiskers/ Alumina whiskers分类
矿业与冶金引用本文复制引用
黄伶俐,于少明,程磊磊,潘晓峰..由膨润土制取氧化铝晶须试验研究[J].矿产综合利用,2012,(6):42-45,4.
