【摘 要】
：
Technological investigations were carried out based on the Bayer process.Predesilication characteristic of the bauxite,the effects of digestion temperature and retention time,concentration of Na2 O am
【机 构】
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Environmental and Chemical Engineering College,Nanchang University,Nanchang,33003,China
【出 处】
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The 6th International Conference on Separation and Technolog
论文部分内容阅读
Technological investigations were carried out based on the Bayer process.Predesilication characteristic of the bauxite,the effects of digestion temperature and retention time,concentration of Na2 O amount of CaO addition on Al2O3 digestion efficiency in Bayer process and the settling characteristics of the red mud were determined.The bauxite in the northern region of China is diasporic type with high silica (in 6-15% SiO2).The main silica minerals in the bauxite are kaolinite and chamosite.The presence of high silica causes high bound-soda losses in the red mud in the Bayer process,but part of silica content in the bauxite was in the form of chamosite,the bound-soda losses could be greaOy reduced with chamosite mineral by using Bayer process.Therefore,it is necessary to study digestion characteristics of the special diasporic bauxite and settling separation properties of the red mud by Bayer process.
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