• A Model Based Parametric Study of Alumina Feeding and Dissolution 

      Aase, Simen; Bekkevoll, Simen; Forberg, Sigmund A.K. (Bachelor thesis, 2020)
      Alumina blir brukt som råmateriale i den energikrevende Hall-Hèroult-prosessen for produksjon av aluminium. I denne prosessen blir aluminapulver matet til et kryolittbad med jevne mellomrom. Det utfordrende miljøet i den ...
    • Alumina Dissolution in Cryolite Melts - Formation and Behavior of Rafts 

      Gylver, Sindre Engzelius (Master thesis, 2018)
      Alumina is the raw-material used for aluminum production in the Hall-Héroult process. Though the process is used for several years, some phenomena is not fully investigated yet. One of those is the formation of floating ...
    • Alumina feeding and raft formation: Raft collection and process parameters 

      Gylver, Sindre Engzelius; Omdahl, Nina Helene; Prytz, Ann Kristin; Meyer, Astrid Johanne; Lossius, Lorentz Petter; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2019)
      Alumina, alongside with electricity and carbon, is the raw material used for production of aluminium in the Hall-Héroult process. An efficient dissolution process is important to acquire stable conditions for the cell, ...
    • CFD Modelling of Alumina Feeding 

      Einarsrud, Kristian Etienne; Gylver, Sindre Engzelius; Manger, Eirik (Journal article, 2018)
      The dissolution and distribution of alumina in molten cryolite bath is a complex process, involving heat and mass transfer, phase transition and dynamics for a particle population with variable size and properties. Although ...
    • Lab Scale Experiments on Alumina Raft Formation 

      Gylver, Sindre Engzelius; Solheim, Asbjørn; Gudbrandsen, Henrik; Follo, Åste Hegglid; Einarsrud, Kristian Etienne (Chapter, 2020)
      During feeding of alumina into a Hall-Héroult cell, rafts floating on the bath surface may be formed. In this study, rafts were created in a laboratory furnace by adding 4 g secondary alumina in industrial bath. Samples ...
    • On Gaseous Emissions During Alumina Feeding 

      Gylver, Sindre Engzelius; Follo, Åste Hegglid; Aulie, Vegard; Granlund, Helene Marie; Sørhuus, Anders; Sandnes, Espen; Einarsrud, Kristian Etienne (Peer reviewed; Journal article, 2021)
      Aluminium electrolysis involves feeding of alumina into a cryolite-based bath. Water originating from alumina as well as from air reacts with fluorides and results in HF evolution. Untreated HF gas is a significant ...
    • The micro- and macrostructure of alumina rafts 

      Gylver, Sindre Engzelius; Nina Helene, Omdahl; Rørvik, Stein; Hansen, Ingrid; Nautnes, Andrea; Neverdal, Sofie Nilssen; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2019)
      As alumina particles are fed to aluminium reduction cells, a frozen layer of bath is typically formed on the particle surface, due to the relatively low bath superheat. For particles in close proximity, platelets with ...