Convection-diffusion Model For Alumina Concentration in Hall-Héroult Process*. Issue 21 (2022)

• Record Type: Journal Article
• Authors: Moreira, Lucas José da Silva; Besançon, Gildas; Ferrante, Francesco; Fiacchini, Mirko; Roustan, Hervé
• Is Part Of: IFAC-PapersOnLine. Volume 55:Issue 21(2022)
• Page Start: 150
• Page End: 155
• Publication Date: 2022
• Subjects: Hall-Héroult process -- Process Modeling; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2022.09.259
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: Hall-Héroult process is an electrolysis method to produce aluminum at industrial scale. It is based on an electrochemical reaction that requires an alumina dissolution in a bath solution. The hazardous operational conditions make it difficult the development of a sensor for continuous measurement. Moreover, local variations of alumina concentration throughout the pot cell arise during daily operations. This paper presents a modeling procedure to obtain a spatio-temporal dynamic representation of alumina concentration distribution. From the convection-diffusion relations, the alumina source term is analyzed and expanded to obtain the relations between the available signals and the output. The goal is to develop a system that is able to predict the obtained measurement by taking into account transport properties. The model is validated with industrial data and compared with other models.