Effect of Temperature on Phase and Alumina Extraction Efficiency of the Product from Sintering Coal Fly Ash with Ammonium Sulfate
查看参考文献21篇
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文摘
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A new developed technology for extracting alumina from coal fly ash was studied in this paper. In this technology, coal fly ash is first sintered with ammonium sulfate, forming ammonium aluminum sulfate in the resultant product, where alumina can be easily leached without using any strong acid or alkali. The products obtained under different sintering conditions were characterized by X-ray diffractometry. Alumina extraction efficiency of these products was also investigated. The results show that the sintering temperature and time substantially influence the phase composition and alumina extraction efficiency of sintered products, while the heating rate has little influence. The optimal sintering condition is 400 °C for 3 h in air with a heating rate of 6 °C·min~(–1).Under the optimal sintering condition, the alumina extraction efficiency from as-sintered coal fly ash can reach 85% or more. |
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来源
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Chinese Journal of Chemical Engineering
,2014,22(11-12):1363-1367 【核心库】
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关键词
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Coal fly ash
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Ammonium sulfate
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Sintering temperature
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Phase
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Alumina extraction efficiency
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地址
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1.
Shenyang University of Technology, School of Materials Science and Engineering, Liaoning, 110178
2.
Shenyang Aluminum and Magnesium Engineering and Research Institute, Liaoning, 110001
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1004-9541 |
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学科
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化学工业 |
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基金
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Supported by the Special Project for High-end CNC Machine Tools and Basic Manufacturing Equipment of China
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Liaoning Excellent Talents in University
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国家自然科学基金
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文献收藏号
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CSCD:5313976
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