Now showing items 21-40 of 46

    • Hydrometallurgical Purification of Magnesium-Doped Silicon by Different Acids 

      Safarian, Jafar; Espelien, Stine (Chapter, 2017)
      The purification of commercial metallurgical grade silicon through alloying and then acid leaching is studied. Magnesium is added into molten silicon and then acid leaching of the solidified Si-Mg alloy by HCl, H2SO4 and ...
    • Inverse modelling of interfacial tension between ferroalloy and slag using openfoam 

      Bublik, Sergey; Einarsrud, Kristian Etienne (Chapter, 2020)
      The entrainment of molten ferroalloy droplets in slag during tapping operations is strongly related to turbulence and interfacial forces between alloy and slag. Therefore, interfacial phenomena are of great importance for ...
    • Iron Separation from Bauxite Through Smelting-Reduction Process 

      Sellæg, Hanne; Kolbeinsen, Leiv; Safarian, Jafar (Chapter, 2017)
      In the alumina production process through the dominant commercial Bayer process red mud, which is not consumable and causes serious environmental challenges is produced. Alternative sustainable process for bauxite treatment ...
    • Kinetics of the leaching of alumina-containing slag for alumina recovery 

      Azof, Fabian Imanasa; Kolbeinsen, Leiv; Safarian, Jafar (Chapter, 2019)
      The leaching kinetics of an alumina-containing slag produced from the smelting-reduction of low-grade bauxite, which contained a significant amount of iron and low levels of SiO2 and TiO2, is studied. The leaching rates ...
    • 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 ...
    • Mass Transfer of Al and Ca Between Silicon and Synthetic SiO2-CaO-Al2O3 Slags 

      Bjørnstad, Erlend Lunnan; Tranell, Gabriella (Chapter, 2017)
      The mass transfer of Al and Ca between silicon and synthetic SiO2 −CaO − Al2O3 slags of varying composition has been investigated, using different experimental set-ups. Samples were kept at 1600◦C, varying the holding times ...
    • Mechanisms of inhibitor action - passivation and self-healing 

      Jevremovic, Ivana; Chen, Ying-Hsuan; Altin, Abdulrahman; Erbe, Andreas (Chapter, 2020)
      In this chapter, we will briefly review the systematics of corrosion inhibitors and the classical mechanisms of action of corrosion inhibitors, the latter with an emphasis on inhibitors interacting with the material surface. ...
    • Medieval copper mining and smelting in Central Norway 

      Stenvik, Lars Fredrik; Espelund, Arne (Chapter, 2019)
      In Norway, copper was used in alloys from the Bronze Age onwards, but domestic copper mining and smelting has not been recognized before the Late Middle Ages. A copper smelter found in Meråker Municipality in Central Norway ...
    • Modeling of Recrystallization of Commercial Particle Containing Al-Alloys 

      Marthinsen, Knut; Huang, Ke; Wang, Ning (Chapter, 2020)
      In order to describe and discuss the recrystallization behavior of commercial particle containing Al-alloys, the physical basis and a mathematical formulation of a softening model nicknamed ALSOFT, accounting for the ...
    • Modified Pechini Synthesis of Oxide Powders and Thin Films 

      Sunde, Tor Olav Løveng; Grande, Tor; Einarsrud, Mari-Ann (Handbook of Sol-Gel Science and Technology;, Chapter; Peer reviewed, 2016)
      The modified Pechini method has become one of the most popular synthesis methods for complex oxide materials due to its simplicity and versatility. The method can be applied to synthesize nanocrystalline powders, bulk ...
    • Nanostructured thin filmse - background, preparation and relation to the technological revolution of the 21st century 

      Benelmekki, Maria; Erbe, Andreas (Chapter, 2019)
      Thin film technology is a mature field encompassing a wide range of applications such as electronics, optical communications, and biosystems. The list of potential applications is practically endless with an impact in ...
    • On modelling electrochemical gas evolution using the volume of fluid method 

      Vachaparambil, Kurian J.; Einarsrud, Kristian Etienne (Chapter, 2020)
      In this work we describe the various building block relevant in simulating electrochemical gas evolution using Volume of Fluid (VOF) method. These building blocks are implemented in the VOF solver available in OpenFOAM® ...
    • Phase Transformations from Quartz to Cristobalite 

      Jusnes, Karin Fjeldstad; Tangstad, Merete; Ringdalen, Eli (The Minerals, Metals & Materials Series;, Chapter; Conference object, 2018)
      Two quartz types used in the silicon and ferrosilicon industry were heated to temperatures of 1600 and 1700 °C. The parameters varied were the temperature and the holding time at maximum temperature. The amount of quartz, ...
    • Porous Carbon Anodes for the Supply of Methane during Electrowinning of Aluminium 

      Khalaghi, Babak; Gudbrandsen, Henrik; Kjos, Ole Sigmund; Osen, Karen Sende; Mokkelbost, Tommy; Haarberg, Geir Martin (Chapter, 2016)
      One of the major downsides of the current aluminium production process is the high amount of CO2 e mission. One alternative is to replace the consumable carbon anodes with inert anodes so that oxygen evolves instead of CO2 ...
    • Recycling of Aluminium from Mixed Household Waste 

      Eggen, Sigvart; Sandaunet, Kurt; Kolbeinsen, Leiv; Kvithyld, Anne (Chapter, 2020)
      Aluminium is used in packaging due to its density, strength and preservative capabilities. This paper outlines a methodology to evaluate the recyclability of aluminium waste, where parameters of scrap type, pre-treatment ...
    • Recycling of Aluminium from Mixed Household Waste 

      Eggen, Sigvart; Sandaunet, Kurt; Kolbeinsen, Leiv; Kvithyld, Anne (Chapter, 2020)
      Aluminium is used in packaging due to its density, strength and preservative capabilities. This paper outlines a methodology to evaluate the recyclability of aluminium waste, where parameters of scrap type, pre-treatment ...
    • SILICON PURIFICATION THROUGH MAGNESIUM ADDITION AND ACID LEACHING 

      Safarian, Jafar; Tranell, Gabriella (Chapter, 2016)
      Silicon is the dominant material in photovoltaic devices and with regard to the PV market growth, the demand for solar grade silicon feedstock is expected to be high in the future. Although solar silicon is currently ...
    • Slag-metal interactions in the FeMn tapping process: Interfacial properties and wetting 

      Bublik, Sergey; Bao, Sarina; Tangstad, Merete; Einarsrud, Kristian Etienne (Chapter, 2019)
      FeMn-alloys are produced by transforming ore and carbon materials into FeMn and slag at high temperatures in a furnace. Entrainment of FeMn in slag during tapping reduces the yield. Entrainment and subsequent separation ...
    • Smelting-reduction of bauxite for sustainable alumina production 

      Safarian, Jafar; Kolbeinsen, Leiv (Chapter, 2016)
      Bauxite ore is the main raw material for aluminum production, it is converted into alumina (Al2O3) to obtain a proper charge material for aluminum production in Hall-Heroult process. Bayer process is the main commercial ...
    • Sour Gas Corrosion—Corrosion of Steels and Other Metallic Materials in Aqueous Environments Containing H2S 

      Genchev, Georgi; Erbe, Andreas (Chapter, 2013)
      The corrosion of metals, mainly steels, in contact with H2S-containing solutions is a general problem especially in gas and oil production. The corrosion products are hydrogen and iron sulfides. Penetration of the hydrogen ...