|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Oxide Sensor Measurements and Simultaneous Optical Observations during Dissolution of Alumina in Cryolite Melt
||Luis Bracamonte, Kristian Etienne Einarsrud, Christian Rosenkilde, Espen Sandnes
|On-Site Speaker (Planned)
Faster dissolution of alumina in a cryolite based bath is one of the key challenges for increasing the energy efficiency and production rate for the Hall-Héroult process. More knowledge of the alumina dissolution process becomes important in order to obtain the improvements. In this work an alumina sensor based on the electromotive force principle was applied to measure the concentration of dissolved alumina in a cryolite based bath from the addition of the alumina and throughout the entire dissolution process. Simultaneously, the dissolution process was video recorded. The measurements were performed in a see-through furnace applying a crucible of quartz, and three different industrial grade secondary aluminas were added in 1 wt% subsequent additions. The general working principle of the sensor was studied and the information extracted from the video recordings was used to explain the sensor results as well as the general dissolution phenomena at different alumina concentrations.
||Planned: Light Metals