Process mechanism of aluminum extraction from secondary aluminum dross by roasting with ammonium sulfate
文献类型：期刊论文
| 作者 | Lei, Bing-Hong2,3,4; Liu, Hong-Hui3,4; Zhang, Hong-Ling1,3,4; Zhang, Di3,4; Dong, Yu-Ming3,4; Lou, Tai-Ping2; Xu, Hong-Bin1,3,4 |
| 刊名 | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
 |
| 出版日期 | 2022-05-28 |
| 卷号 | 32期号:5页码:1418-1429 |
| ISSN号 | 10040609 |
| 关键词 | Alumina - Aluminum hydroxide - Aluminum nitride - Ammonia - Calcination - Calcium fluoride - Decomposition - Fluorspar - III-V semiconductors - Infrared spectroscopy - Sodium compounds - Zinc sulfide |
| DOI | 10.11817/j.ysxb.1004.0609.2021-40135 |
| 英文摘要 | The secondary aluminum dross is one of Al-bearing hazardous wastes produced in the electrolytic aluminum industry. Due to the complex chemical composition of secondary aluminum dross, its aluminum resources have not been effectively utilized. The aluminum resources of secondary aluminum dross can be efficiently recovered by roasting with ammonium sulfate to form ammonium aluminum sulfate, which can easily dissolve into the water. In this paper, the process mechanism of aluminum extraction from secondary aluminum dross through roasting with ammonium sulfate was investigated by thermogravimetric-infrared spectroscopy, XRD, SEM and HSC. The results show that Al2O3, AlN, Na3AlF6, Al and NaAl11O17 are the main Al-containing phases in secondary aluminum dross. The thermal decomposition process of secondary aluminum dross and ammonium sulfate mixture can be divided into six stages. In the stage of 30-215 , physical water gradually volatilizes. In the stage of 215-300 , (NH4)2SO4 is decomposed into NH4HSO4 and NH3. In the stage of 300-337 , NH4HSO4 decomposes and produces SO2, NH3, and H2O. In the stage of 337-437 , Al2O3 reacts with (NH4)2SO4 to produce NH4Al(SO4)2, NH3, and H2O. Besides, Al-containing phases (Al, AlN and NaAl11O17) and fluorides (Na3AlF6, CaF2)) reacts with (NH4)2SO4 to form corresponding sulfates. In the stage of 437-556 , NH4Al(SO4)2 is decomposed into Al2(SO4)3, SO2, NH3, and H2O. In the stage of 556-900 , Al2(SO4)3 is decomposed into Al2O3 and SO2. Therefore, the optimum temperature range of the process is from 300 to 500 . 漏 2022, China Science Publishing & Media Ltd. All right reserved. |
| 学科主题 | Aluminum Oxide |
| 项目编号 | Project(2018YFC1901906) supported by the National Key Research and Development Program of China |
| 出版者 | Central South University of Technology |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/61176]  |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing; 100049, China 2.School of Metallurgy, Northeastern University, Shenyang; 110000, China 3.CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 4.National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China |
| 推荐引用方式 GB/T 7714 | Lei, Bing-Hong,Liu, Hong-Hui,Zhang, Hong-Ling,et al. Process mechanism of aluminum extraction from secondary aluminum dross by roasting with ammonium sulfate[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2022,32(5):1418-1429. |
| APA | Lei, Bing-Hong.,Liu, Hong-Hui.,Zhang, Hong-Ling.,Zhang, Di.,Dong, Yu-Ming.,...&Xu, Hong-Bin.(2022).Process mechanism of aluminum extraction from secondary aluminum dross by roasting with ammonium sulfate.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,32(5),1418-1429. |
| MLA | Lei, Bing-Hong,et al."Process mechanism of aluminum extraction from secondary aluminum dross by roasting with ammonium sulfate".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 32.5(2022):1418-1429. |
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来源：过程工程研究所
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