About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Reduction Technology
|
| Presentation Title |
Assessment of Anode Current as an Indicator of Alumina Concentration and Pot Conditions in Aluminum Reduction Pots |
| Author(s) |
Huaipeng Zhang, Yingyao Yang, Xianwei Hu, Wei Liu, Zhiqi Su, Junfeng Qi, Zhibin Zhao |
| On-Site Speaker (Planned) |
Huaipeng Zhang |
| Abstract Scope |
Real-time monitoring of alumina concentration in industrial aluminum reduction pots remains a significant challenge, and determining its spatial distribution proves even more difficult. Anode current distribution is regarded as a promising indicator for characterizing both alumina concentration and the pot conditions. In this study, anode current signals were systematically evaluated in both the time and frequency domains, using sampling data and continuously recorded anode currents from 500kA aluminum reduction pots. Time-domain analysis reveals that in 76.7% of the measurement data and time periods, changes in anode current were inverse to the change in alumina concentration, which is consistent with the electrochemical consumption mechanism. In comparison with theoretical calculations, however, only seven out of 30 groups show alumina concentration change rates within ±40 % of theoretical values, suggesting that unsteady mass transfer between regions cannot be neglected. Frequency-domain analysis reveals distinct spectral characteristics under normal operation, severe fluctuations, and anode effects. Specifically, spectral power is concentrated near zero frequency under normal conditions; in the 0.15-0.20 Hz range, spectral power increases across multiple regions during severe fluctuations; and during anode effects, low-frequency spectral power is enhanced across a broad band. These findings provide experimental evidence supporting the use of anode current signals for assessing alumina concentration trends and identifying pot conditions. |
| Proceedings Inclusion? |
Planned: Light Metals |