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| Research status and progress of alumina recovery from fly ash |
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Received:April 02, 2021
Revised:April 10, 2021
Accepted:April 13, 2021
Published Online:June 29, 2021
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| DOI： |
| KeyWord:Fly ash;Alumina;Alkali process;Acid process |
| Author | Institution |
| HOU Huiyao |
School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing |
| CHEN Yongqqiang |
School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing |
| MA Baozhong |
School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing |
| SHAO Shuang |
School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing |
| WANG Chengyan |
School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing |
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| Abstract: |
| Comprehensive utilization of high-value elements in high alumina fly ash, especially the high content of aluminum, can not only reduce the dependence of China on foreign high-quality bauxite, but also alleviate the pressure of solid waste treatment in coal-fired power plants in China. Some basic properties of fly ash and the technological progress of extracting alumina from fly ash are described. The processes of extracting alumina from fly ash, such as alkali process, acid process, acid-base combination and carbothermal reduction process, bioleaching process and gas phase extraction process, are introduced. The advantages and disadvantages of different processes are pointed out, Finally, the development direction of alumina extraction from fly ash in the future is proposed. |
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