کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4769116 | 1362515 | 2016 | 39 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new process of extracting alumina from high-alumina coal fly ash in NH4HSO4Â +Â H2SO4 mixed solution
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Alumina was leached from high-alumina coal fly ash with a NH4HSO4Â +Â H2SO4 mixed solution. The leaching behavior was systematically investigated, as were factors such as mixed solution composition and concentration, reaction time and temperature, and liquid-to-solid ratio. In optimal conditions, the alumina extraction ratios can reach 87.8%, 91.1%, and 87.5% for the three different sources of coal fly ash, respectively. The phases and morphology of the raw materials and residues were also analyzed through X-ray diffraction and scanning electron microscopy-energy dispersive spectroscopy. Results showed that mullite, which is the main form taken by alumina in high-alumina coal fly ash, can be effectively decomposed to release the alumina and induce a new amorphous silica phase in mixed solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 165, Part 2, October 2016, Pages 336-344
Journal: Hydrometallurgy - Volume 165, Part 2, October 2016, Pages 336-344
نویسندگان
Dehua Xu, Huiquan Li, Weijun Bao, Chenye Wang,