|
| Mechanism of High Temperature Treatment of Spent Cathode in Aluminum Electrolysis |
|
Received:December 02, 2022
Revised:December 06, 2022
Accepted:December 12, 2022
Published Online:February 13, 2023
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2023.03.009 |
| KeyWord:electrolytic aluminium; spent cathode; high temperature treatment method; degree of graphitization; graphite grains |
| Author | Institution |
| SHEN Shi-fu |
矿冶科技集团有限公司 |
| LIU Peng |
滨州市宏通资源综合利用有限公司 |
| WANG Jin-ling |
矿冶科技集团有限公司 |
| LIU Hai-ying |
矿冶科技集团有限公司 |
| CHEN Yong-jian |
滨州市宏通资源综合利用有限公司 |
| CHAI Xiao |
滨州市宏通资源综合利用有限公司 |
| WANG Kai |
矿冶科技集团有限公司 |
|
| Hits: 1663 |
| Download times: 1713 |
| Abstract: |
| High temperature treatment method is the main research direction in treating spent cathode of aluminum electrolysis. The effects of calcination temperature, calcination time and particle size of sample on removal efficiency of cyanide, fluoride and other elements were studied, and the relationship between degree of graphitization, true density, powder resistivity and calcination temperature were investigated. The results show that cyanide can be completely decomposed by roasting at 600 ℃, fluorine and other components (without carbon) can be removed by roasting at 1 000 ℃ above. The removal rate of fluorine and other components rises with the increase of calcination temperature. The graphitization degree and true density of graphite fragments rises with the increase of calcination temperature. When the calcination temperature reaches 2 600 ℃, the graphitization degree and true density of graphite fragments reach 98.4% and 2.270 3 g/cm3 respectively. The resistivity of graphite powder drops with the increase of calcination temperature. The calcinated graphite grains are of high application value. |
| Close |