|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Alumina Concentration Measurements in Cryolite Melts
||Luis Bracamonte, Espen Sandnes, Christian Rosenkilde, Karoline Nilsen
|On-Site Speaker (Planned)
The alumina dissolution is one of the most important processes for advanced aluminium electrolysis. For a better understanding and improvements on the dissolution process, it is important to find an effective and reliable method to perform in situ measurements in the cryolite melt, obtaining in this way the variation in alumina concentration during the entire electrolysis process.
Electromotive force (emf) measurements between a graphite sensor and the two different reference electrodes graphite and aluminium, were performed during the addition of alumina and throughout the entire dissolution process.
Cell reactions between the graphite probe and the two reference electrodes were derived, and the theoretical cell voltages were calculated. Experimental measurements were analyzed and compared with the theoretical calculations, in order to determine the reliability of the electrochemical method for determination of alumina concentration in cryolite melts, and to obtain a characterization of the dissolution process.
||Planned: Light Metals