碱活化微波萃取粉煤灰中铝的研究

Journal of Residuals Science & Technology Pub Date : 2016-01-01 DOI:10.12783/ISSN.1544-8053/13/2/S26

Nengsheng Liu, Libo Zhang Shixing Wang Shaojun Huang Sufang He Jinhui Peng

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引用次数: 3

摘要

从粉煤灰中回收铝是一种实用的铝增值利用方法。采用常规加热(CH)和微波加热(MWH)两种加热方法，对Na2CO3对CFA进行碱活化。与CH相比，MWH增强了CFA-Na2CO3混合物中的原子扩散和质量输运，加速了莫来石的分解和可溶性含al物质的形成，从而大大降低了烧结温度，大大缩短了活化反应时间。在中等活化条件下(700℃，20 min)，铝的提取率可达95.52%以上。

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

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°C and 20 min), the aluminum extraction could reach 95.52% or more.

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来源期刊

Journal of Residuals Science & Technology 环境科学-工程：环境

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： The international Journal of Residuals Science & Technology (JRST) is a blind-refereed quarterly devoted to conscientious analysis and commentary regarding significant environmental sciences-oriented research and technical management of residuals in the environment. The journal provides a forum for scientific investigations addressing contamination within environmental media of air, water, soil, and biota and also offers studies exploring source, fate, transport, and ecological effects of environmental contamination.