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
收藏
页码：S181 / S187
页数：7
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