Extraction of Aluminum from Coal Fly Ash by Alkali Activation with Microwave Heating

被引：4

作者：

Liu, Nengsheng ^{[1
]}

Peng, Jinhui ^{[1
]}

Zhang, Libo ^{[1
]}

Wang, Shixing ^{[1
]}

Huang, Shaojun ^{[2
]}

He, Sufang ^{[2
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China

[2] Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Peoples R China

来源：

JOURNAL OF RESIDUALS SCIENCE & TECHNOLOGY | 2016年 / 13卷

关键词：

RECOVERY; CHEMISTRY; GROWTH;

D O I：

10.12783/issn.1544-8053/13/2/S26

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Recovering aluminum from coal fly ash (CFA) is a practical option for its value-added utilization. The alkali activation of CFA with Na2CO3 was carried out using two heating methods: the conventional heating (CH) and microwave heating (MWH). Compared to CH, MWH enhanced the atomic diffusion and mass transportation in the CFA-Na2CO3 mixture, accelerated the decomposition of mullite and the formation of the soluble Al-containing materials, thus greatly reducing the sintering temperature and dramatically shortening the activation reaction time. Under the moderate activation condition in MWH (700 degrees C and 20 min), the aluminum extraction could reach 95.52% or more.

引用

页码：S181 / S187

页数：7

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