|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Studies on Anode Preheating Using Individual Anode Current Signals in Hall-Héroult Reduction Cells
||Ali Jassim, Sergey Akmetov, Barry Welch, Jie Bao, Maria Skyllas-Kazacos, Yuchen Yao
|On-Site Speaker (Planned)
The proportional increase in modern cells amperage and anode size while aiming for low energy input has resulted in slowing the process of anode current pick-up rate. Changes in cell thermal and electrical balance due to anode replacement (while a thick layer of frozen electrolyte is formed under a new anode) causes a slower anode current pickup rate which may require 4 days to reach the target current. Variations in cell conditions following anode replacement result in increasing cell magnetohydrodynamic instability and prolonged presence of low superheat zones. They increase the possibility of forming local abnormalities such as anode spikes. As part of continuous enhancement programme, the latest developed individual anode current monitoring system in Dubal was used to study the benefits of preheating anodes up to 500 °C. The work includes studying the impact of anode preheating on current pickup rate while conducting operations such as anode dressing.
||Planned: Light Metals Volume