Study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum dross
The black aluminum dross (BAD) from aluminum recycling industry is considered to be a hazardous material due to containing a large amount of AlN and fluoride salt. The potential environmental problems caused by BAD restrict the sustainable development of the aluminum recycling industry. A calcining-...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-12-01
|
| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535223008225 |
| _version_ | 1797615937752399872 |
|---|---|
| author | Mingzhuang Xie Rongbin Li Fengqin Liu Hongliang Zhao |
| author_facet | Mingzhuang Xie Rongbin Li Fengqin Liu Hongliang Zhao |
| author_sort | Mingzhuang Xie |
| collection | DOAJ |
| description | The black aluminum dross (BAD) from aluminum recycling industry is considered to be a hazardous material due to containing a large amount of AlN and fluoride salt. The potential environmental problems caused by BAD restrict the sustainable development of the aluminum recycling industry. A calcining-leaching process for preparing α-Al2O3 by using BAD is proposed in this paper. The transformation mechanism of toxic substances is discussed in detail based on the analysis of TG-DTG-DSC&MS. The results show that the reaction between AlN and O2 occurs in the range of 500–1000 °C. Most of the gaseous products are N2, and there is also a small amount of NO. The average conversion rate is 0.087 mg/min. The average volatilization rate of chloride salt in BAD under Ar atmosphere is 0.065 mg/min, and the average volatilization rate under Ar + O2 atmosphere is 0.089 mg/min, which is slightly higher than that of pure Ar atmosphere. The BAD processed by calcination-leaching process contain more than 95 % corundum and magnesia-aluminum spinel, which can be used as high-quality raw materials for the preparation of refractory materials. |
| first_indexed | 2024-03-11T07:34:05Z |
| format | Article |
| id | doaj.art-93c09dfbf5a745ee979ef83d4cdb365b |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-03-11T07:34:05Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-93c09dfbf5a745ee979ef83d4cdb365b2023-11-17T05:26:07ZengElsevierArabian Journal of Chemistry1878-53522023-12-011612105360Study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum drossMingzhuang Xie0Rongbin Li1Fengqin Liu2Hongliang Zhao3State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaCorresponding authors.; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaCorresponding authors.; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaThe black aluminum dross (BAD) from aluminum recycling industry is considered to be a hazardous material due to containing a large amount of AlN and fluoride salt. The potential environmental problems caused by BAD restrict the sustainable development of the aluminum recycling industry. A calcining-leaching process for preparing α-Al2O3 by using BAD is proposed in this paper. The transformation mechanism of toxic substances is discussed in detail based on the analysis of TG-DTG-DSC&MS. The results show that the reaction between AlN and O2 occurs in the range of 500–1000 °C. Most of the gaseous products are N2, and there is also a small amount of NO. The average conversion rate is 0.087 mg/min. The average volatilization rate of chloride salt in BAD under Ar atmosphere is 0.065 mg/min, and the average volatilization rate under Ar + O2 atmosphere is 0.089 mg/min, which is slightly higher than that of pure Ar atmosphere. The BAD processed by calcination-leaching process contain more than 95 % corundum and magnesia-aluminum spinel, which can be used as high-quality raw materials for the preparation of refractory materials.http://www.sciencedirect.com/science/article/pii/S1878535223008225Aluminum recyclingBlack aluminum drossAluminum nitrideα-Al2O3TG-DTG-DSC&MS |
| spellingShingle | Mingzhuang Xie Rongbin Li Fengqin Liu Hongliang Zhao Study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum dross Arabian Journal of Chemistry Aluminum recycling Black aluminum dross Aluminum nitride α-Al2O3 TG-DTG-DSC&MS |
| title | Study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum dross |
| title_full | Study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum dross |
| title_fullStr | Study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum dross |
| title_full_unstemmed | Study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum dross |
| title_short | Study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum dross |
| title_sort | study on thermal behavior of hazardous substances in the process of preparing corundum from black aluminum dross |
| topic | Aluminum recycling Black aluminum dross Aluminum nitride α-Al2O3 TG-DTG-DSC&MS |
| url | http://www.sciencedirect.com/science/article/pii/S1878535223008225 |
| work_keys_str_mv | AT mingzhuangxie studyonthermalbehaviorofhazardoussubstancesintheprocessofpreparingcorundumfromblackaluminumdross AT rongbinli studyonthermalbehaviorofhazardoussubstancesintheprocessofpreparingcorundumfromblackaluminumdross AT fengqinliu studyonthermalbehaviorofhazardoussubstancesintheprocessofpreparingcorundumfromblackaluminumdross AT hongliangzhao studyonthermalbehaviorofhazardoussubstancesintheprocessofpreparingcorundumfromblackaluminumdross |