• Extent of Ore Prereduction in Pilot-scale Production of High Carbon Ferromanganese 

      Mukono, Tichaona; Gjøvik, Jonas Einan; Gaertner, Heiko; Wallin, Maria; Ringdalen, Eli; Tangstad, Merete (Peer reviewed; Journal article, 2021)
      Three pilot-scale experiments have been conducted at SINTEF/NTNU in a 440 kVA AC electric furnace to demonstrate the process operation, energy requirements and CO2 emissions in the production of high carbon ferromanganese ...
    • Isothermal Reduction of Nchwaning Manganese Ore in CO/CO2/H2 Atmospheres 

      Schanche, Trygve Lindahl; Tangstad, Merete (Journal article, 2021)
      In the industrial production of manganese ferroalloys, incomplete pre-reduction of higher manganese- and iron oxides in the furnace causes an excess consumption of carbon and energy. Pre-treatment of the manganese raw ...