以粉煤灰为原料制备高纯氧化铝

被引：67

作者：

李来时 ^{[1
]}

翟玉春 ^{[1
]}

秦晋国 ^{[2
]}

吴艳 ^{[1
]}

刘瑛瑛 ^{[1
]}

机构：

[1] 东北大学材料与冶金学院

[2] 润泽投资有限公司

来源：

化工学报 | 2006年 / 09期

关键词：

粉煤灰; 氧化铝; 硫酸铝铵; 工艺; 最佳条件;

D O I：

暂无

中图分类号：

X773 [电力工业];

学科分类号：

083002 ;

摘要：

Ammonium aluminum sulfate hydroxide[NH4Al（SO4）2·12H2O], the precursor of Al2O3, was prepared with the method of sintering, leaching and adjusting the pH value by using fly ash and ammonium sulfate as raw materials.High-purity alumina was prepared by calcining NH4Al（SO4）2·12H2O.The effects of the temperature and time of sintering, molar ratio of（NH4）2SO4 vs the Al2O3 in fly ash and the grain size of fly ash on the extraction efficiency of Al2O3 from fly ash were studied.The efficiency of Al2O3 extraction could reach 95.6 percent under the optimum conditions.The purity of the Al2O3 from calcining NH4Al（SO4）2·12H2O that was refined by recrystallization was higher than 99.9 percent.

引用

页码：2189 / 2193

页数：5