Kinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate
查看参考文献25篇
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文摘
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The further development of the extraction of alumina that is produced in the calcination process of ammonium sulfate mixed with fly ash was limited because of the lack of systematic theoretical study. In order to aggrandize the research of the calcination process, the kinetics and reaction mechanism of the calcinations were studied. The result suggests that there are two stages in the calcination process, and the alumina extraction rate increases swiftly in the initial stage, but slows down increasing in the later stage. The apparent activation energy of the initial and later stages equals to 13.31 and 35.65 kJ·mol~(-1), respectively. In the initial stage, ammonium sulfate reacts directly with mullite in the fly ash to form ammonium aluminum sulfate, while in the later stage, aluminum sulfate is formed by the reaction between ammonium aluminum sulfate and ammonium sulfate. |
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来源
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Chinese Journal of Chemical Engineering
,2014,22(9):1027-1032 【核心库】
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DOI
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10.1016/j.cjche.2014.06.033
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关键词
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Mixing calcinations
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Kinetics
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Activation energy
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Reaction mechanism
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地址
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1.
College of Resources and Civil Engineering, Northeastern University, Shenyang, 110819
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Shenyang Aluminum and Magnesium Engineering and Research Institute, Shenyang, 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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the National Science and Technology Project of China
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文献收藏号
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CSCD:5277249
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