Kinetics study of microwave enhanced reactions between diasporic bauxite and alkali solution
作者: Thiquynhxuan LeShaohua JuSivasankar KoppalaJinhui PengBo PanLibo ZhangQi WangXiteng Li
作者单位: 1Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
2Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
3State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
4Key Laboratory of Intensification Metallurgy, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
刊名: Journal of Alloys and Compounds, 2018, Vol.749 , pp.652-663
来源数据库: Elsevier Journal
DOI: 10.1016/j.jallcom.2018.03.323
关键词: Diasporic bauxiteMicrowave heatingConventional heatingReaction kineticsMechanism
英文摘要: Abstract(#br)In this work, the kinetic reactions between NaOH and the Al-bearing minerals were investigated, when the slurry mixture of diasporic bauxite and alkaline solutions were roasted by microwave (MWH) and conventional heating (CH). The XRD patterns reveal that the MWH method effectively promotes the reactions between NaOH with Al-bearing minerals to form NaAlO 2 , and inhibits the dehydration of AlOOH. Compared to CH, MWH greatly decreases the roasting temperature nearly 400 °C and shortens the reaction time by 3 times to completely transform Al-bearing minerals from raw bauxite into NaAlO 2 . The model fitting results show that the kinetics of the reactions between NaOH and the Al-bearing minerals for both heating methods can be described by the Jander's model. The value of...
全文获取路径: Elsevier  (合作)
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影响因子:2.39 (2012)

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关键词翻译
关键词翻译
  • microwave 微波
  • bauxite 铝土矿
  • study 学习
  • between 在中间
  • solution 溶液
  • alkali 
  • enhanced 增强