Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery
The aluminum nitride in the secondary aluminum (Al) dross release ammonia gas when it contacts with water. Therefore, the aluminum nitride poses a serious security threat to the environment. Denitrification is an important way to realize the harmless and resource utilization of secondary aluminum as...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences
2025-04-01
|
| Series: | Kuangchan zonghe liyong |
| Subjects: | |
| Online Access: | http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2025.02.006 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849311389888282624 |
|---|---|
| author | Neng QIU Hongfei LIN Lihai LU Qifeng YANG Yuwen ZHOU |
| author_facet | Neng QIU Hongfei LIN Lihai LU Qifeng YANG Yuwen ZHOU |
| author_sort | Neng QIU |
| collection | DOAJ |
| description | The aluminum nitride in the secondary aluminum (Al) dross release ammonia gas when it contacts with water. Therefore, the aluminum nitride poses a serious security threat to the environment. Denitrification is an important way to realize the harmless and resource utilization of secondary aluminum ash. A denitrification process of secondary Al ash was developed in this study. The influences of reaction temperature, reaction time, liquid-solid ratio on the denitrification ratio of secondary Al ash were explored, and the recycling rate of aluminum was also investigated.The results showed that satisfactory denitrification results can be achieved by keeping reaction temperature at 80～95 °C for 3～5 h, and controlled liquid-solid ratio at (4～12):1, the maximum denitrification ratio can reach 97.5%. Considered cost and treatment efficiency, the recommended denitrification parameters were 80 °C, 3 h and liquid-solid ratio of 6:1, and the aluminum loss rate decreased from 5% to 0.29% at these conditions. The denitrification process developed in this study has demonstrated its advantages in lower cost and higher efficiency, and it can further reduce the loss of aluminum resources to improve its reutilization. |
| format | Article |
| id | doaj-art-8d1336feb3d645edb65f92b8c3da0041 |
| institution | Kabale University |
| issn | 1000-6532 |
| language | zho |
| publishDate | 2025-04-01 |
| publisher | Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences |
| record_format | Article |
| series | Kuangchan zonghe liyong |
| spelling | doaj-art-8d1336feb3d645edb65f92b8c3da00412025-08-20T03:53:23ZzhoInstitute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological SciencesKuangchan zonghe liyong1000-65322025-04-01462374210.3969/j.issn.1000-6532.2025.02.0062025-02qiunengRemoval of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum RecoveryNeng QIU0Hongfei LIN1Lihai LU2Qifeng YANG3Yuwen ZHOU4Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning, 530006, Guangxi, ChinaGuangxi Bossco Environmental Protection Technology Co., Ltd., Nanning, 530006, Guangxi, ChinaGuangxi Bossco Environmental Protection Technology Co., Ltd., Nanning, 530006, Guangxi, ChinaGuangxi Bossco Environmental Protection Technology Co., Ltd., Nanning, 530006, Guangxi, ChinaGuangxi Bossco Environmental Protection Technology Co., Ltd., Nanning, 530006, Guangxi, ChinaThe aluminum nitride in the secondary aluminum (Al) dross release ammonia gas when it contacts with water. Therefore, the aluminum nitride poses a serious security threat to the environment. Denitrification is an important way to realize the harmless and resource utilization of secondary aluminum ash. A denitrification process of secondary Al ash was developed in this study. The influences of reaction temperature, reaction time, liquid-solid ratio on the denitrification ratio of secondary Al ash were explored, and the recycling rate of aluminum was also investigated.The results showed that satisfactory denitrification results can be achieved by keeping reaction temperature at 80～95 °C for 3～5 h, and controlled liquid-solid ratio at (4～12):1, the maximum denitrification ratio can reach 97.5%. Considered cost and treatment efficiency, the recommended denitrification parameters were 80 °C, 3 h and liquid-solid ratio of 6:1, and the aluminum loss rate decreased from 5% to 0.29% at these conditions. The denitrification process developed in this study has demonstrated its advantages in lower cost and higher efficiency, and it can further reduce the loss of aluminum resources to improve its reutilization.http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2025.02.006secondary al ashdenitrificationloss ratealuminum recovery |
| spellingShingle | Neng QIU Hongfei LIN Lihai LU Qifeng YANG Yuwen ZHOU Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery Kuangchan zonghe liyong secondary al ash denitrification loss rate aluminum recovery |
| title | Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery |
| title_full | Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery |
| title_fullStr | Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery |
| title_full_unstemmed | Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery |
| title_short | Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery |
| title_sort | removal of aluminum nitride from secondary aluminum ash and its aluminum recovery |
| topic | secondary al ash denitrification loss rate aluminum recovery |
| url | http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2025.02.006 |
| work_keys_str_mv | AT nengqiu removalofaluminumnitridefromsecondaryaluminumashanditsaluminumrecovery AT hongfeilin removalofaluminumnitridefromsecondaryaluminumashanditsaluminumrecovery AT lihailu removalofaluminumnitridefromsecondaryaluminumashanditsaluminumrecovery AT qifengyang removalofaluminumnitridefromsecondaryaluminumashanditsaluminumrecovery AT yuwenzhou removalofaluminumnitridefromsecondaryaluminumashanditsaluminumrecovery |