• Pilot Scale Production of Manganese Ferroalloys Using Heat-Treated Mn-Nodules 

      Tangstad, Merete; Ringdalen, Eli; Manilla, Edmundo; Davila, Daniel (Journal article; Peer reviewed, 2017)
      Pilot-scale experiments are one way to investigate the process patterns and the reaction mechanisms of processes and raw materials. To understand a process fully, both theoretical considerations as well as small-scale ...
    • Reduction Mechanisms in Manganese Ore and Deposition of Carbon from Natural Gas 

      Svoen, Stine (Master thesis, 2017)
      This report investigates the deposition of carbon from natural gas onto manganese ore and the effect of reduction of the higher manganese oxides. Manganese ore has been heated in an argon atmosphere, before methane was ...
    • Reduction of SiO2 to SiC using natural gas 

      Ksiazek, Michal Tomasz; Tangstad, Merete; Dalaker, Halvor; Ringdalen, Eli (Journal article; Peer reviewed, 2014)
      This paper presents a preliminary study of SiC production by use of natural gas for reduction of silica. Direct reduction of SiO2 by gas mixtures containing CH4, H2, and Ar was studied at temperatures between 1273 K and ...
    • Reduction Rates of SiMn Slags from Various Raw Materials 

      Kim, Pyunghwa Peace (Doctoral theses at NTNU;2018:260, Doctoral thesis, 2018)
    • Reduction Rates of SiMn Slags from Various Raw Materials 

      Kim, Pyunghwa Peace (Doctoral theses at NTNU;2018:260, Doctoral thesis, 2018)
      The kinetic information in the SiMn (Silicomanganese) process from melting of raw materials to production of metal was investigated in this work. This is of interest for the SiMn production industries where the effect of ...
    • Road-map for gas in the Norwegian metallurgical industry: greater value creation and reduced emissions 

      Dalaker, Halvor; Ringdalen, Eli; Kolbeinsen, Leiv; Mårdalen, Jostein (Research report, 2017)
      In order to increase the use of gas in metal production, we will need to develop new – and to further develop existing – gas-based technologies, which will need to be adopted on an industrial scale. In order to provide a ...
    • Shock Heating Test of Quartz for Si and FeSi Production 

      Jusnes, Karin Fjeldstad; Tangstad, Merete; Ringdalen, Eli (Research report, 2017)
      Six different quartz types used as raw material for Si and FeSi production, were shock heated to 1500 °C in an induction furnace. The amounts of fines produced were measured and compared. The method has been used before ...
    • SiC formation and SiO reactivity of methane at high temperatures 

      Aarnæs, Trygve Storm; Tangstad, Merete; Ringdalen, Eli (Peer reviewed; Journal article, 2021)
      Methane (CH4) is a carbon source currently not in use in the production of silicon. Using a gaseous carbon source instead of conventional solid carbon sources presents an opportunity to rethink silicon production. Preliminary ...
    • SiC production using SiO 2 and Cagglomerates 

      Li, Fei (Doctoral theses at NTNU;2017:180, Doctoral thesis, 2017)
      Due to the possible shortage of high-quality fossil carbon materials and charcoal for the Si industry, this study will focus on the possibility of using natural gas as the substitute of commercially scarce high quality ...
    • Silicon carbide formation from methane and silicon monoxide 

      Aarnæs, Trygve Storm; Ringdalen, Eli; Tangstad, Merete (Peer reviewed; Journal article, 2020)
      Silicon carbide (SiC) formation plays an important role during the production of elemental silicon. SiC forms through a high temperature reaction between silicon monoxide gas (SiO) and carbon. Currently, the carbon sources ...
    • Steam Reforming of Methane on Sponge Iron: Influence of GasComposition on Reaction Rate 

      Ramos Ribeiro, Tiago; Neto, João Batista Ferreira; Poco, Joao G R; Takano, Cyro; Kolbeinsen, Leiv; Ringdalen, Eli (Peer reviewed; Journal article, 2020)
      Direct Reduction processes use gases (CO and H2) for iron reduction and production of sponge iron or direct reduced iron (DRI). The generation of this gas occurs through methane reforming, which can be done in a reformer ...
    • Synthesis and Reduction-Carburization of (Fe,Mg)(Cr,Al)2O4 Composite Spinel Solid Solution With CH4 

      Canaguier, Vincent (Doctoral theses at NTNU;2018:193, Doctoral thesis, 2018)