Alumina extraction from coal fly ash with ammonium sulfate and sulfuric acid

被引：0

作者：

Yang J. ^{[1
,2
]}

Sun H. ^{[1
,2
]}

Peng T. ^{[1
,2
]}

Lin Y. ^{[1
,2
]}

机构：

[1] Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, 621010, Sichuan

[2] Institute of Mineral Materials & Application, Southwest University of Science and Technology, Mianyang, 621010, Sichuan

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2016年 / 44卷 / 10期

关键词：

Al[!sub]2[!/sub]O[!sub]3[!/sub; Ammonium sulfate; Coal fly ash; Sulfuric acid;

D O I：

10.14062/j.issn.0454-5648.2016.10.23

中图分类号：

学科分类号：

摘要：

A roasting activation process of coal fly ash (CFA-1) using the composite additives of ammonium sulfate ((NH4)2SO4) and sulfuric acid (H2SO4) was developed. The products obtained under different roasting conditions and their liquid-leached residues were characterized by X-ray diffractometry and scanning electron microscopy. The results show that, the composite additives promote the transformation of Al2O3 in coal fly ash into NH4Al(SO4)2; the Al2O3 extraction efficiency from coal fly ash reaches 84.7% under the optimal roasting condition, i.e., roasting at 400℃ for 2h in air with a heating rate of 7℃·min-1, the molar ratio of SO42- in mix roasting additives to Al2O3 in coal fly ash at 8.0, and the molar ratio of H2SO4 to (NH4)2SO4 at 1.5. © 2016, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：1538 / 1542

页数：4

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