Blar i Institutt for materialteknologi på tidsskrift "Metallurgical and Materials Transactions B"

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    • Behavior of Al4C3 Particles During Flotation and Sedimentation in Aluminum Melts 

      Gökelma, Mertol; Aarnæs, Trygve Storm; Maier, Jürgen; F. Renkel, Maria; Ekstrøm, Kai Erik; Friedrich, Bernd; Tranell, Gabriella (Peer reviewed; Journal article, 2021)
      Al4C3 particles form during the primary production of aluminum via molten salt electrolysis due to the carbon solubility and direct contact between bath, metal, and carbon anodes. Additional Al4C3 may form during melt ...

    • Behavior of Slag in Ferromanganese and Silicomanganese Smelting Process 

      Lee, Young E.; Kolbeinsen, Leiv (Peer reviewed; Journal article, 2021)
      A review of studies by Safarian et al. and Kim show that the smelting reaction at equilibrium for ferromanganese and silicomanganese alloys is defined by the coupled reaction in the carbon-saturated condition 2Mn––––+(Si ...

    • Bubble Evolution on Different Carbon Anode Designs in Cryolite Melt 

      Stanic, Nikolina; Jevremovic, Ivana; Martinez, Ana Maria Cuellar; Sandnes, Espen (Peer reviewed; Journal article, 2020)
      The anode potential has been shown to be highly dependent on anode geometry and orientation in the Hall–Héroult process. This work is an experimental laboratory scale study of the effect of anode geometry and orientation ...

    • Carburization of Manganese Oxide Sources by Natural Gas 

      Cheraghi, Alireza; Yoozbashizadeh, Hossein; Safarian, Jafar (Peer reviewed; Journal article, 2022)
      Carburization of Comilog ore, pure MnO powder, and MnO pellet by natural gas was studied by experimental work. XRD, SEM-EDS, and thermogravimetric techniques were used for characterization and reduction behavior analysis. ...

    • Characterization, thermodynamics and mechanism of formation of SiC-SiOx core–shell nanowires 

      Broggi, Andrea; Ringdalen, Eli; Tangstad, Merete (Peer reviewed; Journal article, 2020)
      Silicon carbide nanowires are valuable for electronic and optical applications, due to their high mechanical and electrical properties. Previous studies demonstrated that nanowires can be produced easily, by mixing a ...

    • Comparative study of AC and DC solvers based on current and power distributions in a submerged arc furnace 

      Tesfahunegn, Yonatan; Magnusson, Tordur; Tangstad, Merete; Sævarsdottir, Gudrun A. (Peer reviewed; Journal article, 2020)
      This work discusses 3D models of current distribution in a three-phase submerged arc furnace that contains several components, such as electrodes, central arcs, craters, crater walls, and side arcs that connect electrodes ...

    • Effect of different SiO2 polymorphs on the reaction between SiO2 and SiC in Si production 

      Folstad, Marit Buhaug; Ringdalen, Eli; Tveit, Halvard; Tangstad, Merete (Peer reviewed; Journal article, 2021)
      This work investigates the phase transformations in silica (SiO2) during heating to a target temperature between 1700 °C and 1900 °C and the effect of SiO2 polymorphs on the reduction reaction 2SiO2 + SiC = 3SiO + CO in ...

    • Effect of Moisture, Hydrogen, and Water–Gas Shift Reaction on the Prereduction Behavior of Comilog and Nchwaning Manganese Ores 

      Larssen, Trine Asklund; Tangstad, Merete (Peer reviewed; Journal article, 2022)
      The ore–gas reactions in the prereduction zone in a ferromanganese furnace are largely decisive of the overall energy efficiency, carbon consumption, and climate gas emissions in ferromanganese production. An increased ...

    • Effects of La2O3 Addition into CaO-SiO2 Slag: Structural Evolution and Impurity Separation from Si-Sn Alloy 

      Zhu, Mengyi; Wu, Guixuan; Azarov, Alexander; Monakhov, Eduard; Tang, Kai; Müller, Michael; Safarian, Jafar (Peer reviewed; Journal article, 2021)
      Boron (B) and phosphorus (P) are the most problematic impurities to be removed in the production of solar-grade silicon by the metallurgical process. In this work, the distribution of B and P between CaO-(La2O3)-SiO2 slags ...

    • Experimental Study on the Chemical Stability of Phosphate Bonded Al2O3-based Ceramic Foam Filters (CFFs) 

      Bergin, Are; Voigt, Claudia; Fritzsch, Robert; Akhtar, Shahid; Arnberg, Lars; Aneziris, Christos G; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2021)
      Production of high-quality aluminum products requires an extensive melt treatment process, even more so with the increasing focus on recycling and sustainability. Filtration is a commonly used process segment for removal ...

    • Influence of grain refiners on the wettability of Al2O3 substrate by aluminum melt 

      Yang, Jiawei; Bao, Sarina; Akhtar, Shahid; Shen, Ping; Li, Yanjun (Peer reviewed; Journal article, 2020)
      It is well known that grain refiner additions in aluminum melts significantly reduce the filtration efficiency of ceramic foam filters (CFF). However, the mechanism remains unclear. In this work, the influence of grain ...

    • The Influences of Grain Refiner, Inclusion Level, and Filter Grade on the Filtration Performance of Aluminum Melt 

      Yang, Jiawei; Bao, Sarina; Akhtar, Shahid; Tundal, Ulf; Tjøtta, Stig; Li, Yanjun (Peer reviewed; Journal article, 2021)
      The addition of grain refiner particles in the aluminum melt is known to reduce the filtration efficiency of ceramic foam filter (CFF). In the present work, a systematic study on the influence of the addition level of ...

    • The Interactions Between Oxide Film Inclusions and Inoculation Particles TiB2 in Aluminum Melt 

      Yang, Jiawei; Bao, Sarina; Akhtar, Shahid; Li, Yanjun (Peer reviewed; Journal article, 2021)
      In this work, a systematic study on the interactions between aluminum oxide films and TiB2 grain refiner particles and their effect on grain refinement behavior have been conducted. Oxide f ilms were introduced into a ...

    • Interfacial Behaviour in Ferroalloys: The Influence of FeMn Slag Composition 

      Bublik, Sergey; Tangstad, Merete; Einarsrud, Kristian Etienne (Peer reviewed; Journal article, 2022)
      The present study investigated the interfacial interaction between FeMn alloy and slags of different compositions and basicity from 0.4 to 1.2 in a sessile drop furnace. Interfacial tension between the FeMn alloy and the ...

    • Interfacial Behaviour in Ferroalloys: The Influence of Sulfur in FeMn and SiMn Systems 

      Bublik, Sergey; Bao, Sarina; Tangstad, Merete; Einarsrud, Kristian Etienne (Peer reviewed; Journal article, 2021)
      The present study has investigated the influence of sulfur content in synthetic FeMn and SiMn from 0 to 1.00 wt pct on interfacial properties between these ferroalloys and slags. The effect of experimental parameters such ...

    • Investigation of Two Immiscible Liquids Wetting at Elevated Temperature: Interaction Between Liquid FeMn Alloy and Liquid Slag 

      Bao, Sarina; Tangstad, Merete; Tang, Kai; Einarsrud, Kristian Etienne; Syvertsen, Martin; Onsøien, Morten Ingar; Kudyba, Artur; Bublik, Sergey (Peer reviewed; Journal article, 2021)
      The goal of the current work is to develop a methodology to study the wetting behaviour of two immiscible liquids at high temperatures, and to investigate the parameters which influence the wetting properties. The wetting ...

    • Kinetics of Slag Reduction in Silicomanganese Production 

      Canaguier, Vincent Yves; Tangstad, Merete (Peer reviewed; Journal article, 2020)
      In this study, the reduction of three silicomanganese charges prepared from industrial raw materials was investigated under isothermal conditions between 1783 K and 1933 K (1510 °C and 1660 °C). The main reactions examined ...

    • Magnesiothermic Reduction of Natural Quartz 

      Rasouli, Azam; Herstad, Karl Edvin; Safarian, Jafar; Tranell, Gabriella (Journal article; Peer reviewed, 2022)
      In the current work, the metallothermic reduction of natural quartz by magnesium has been studied at 1373 K under different reaction conditions, i.e. quartz type, quartz particle size, Mg:SiO2 mole ratio and reaction time. ...

    • Modeling Alumina Feeding With the µ(I)-Rheology 

      Gylver, Sindre Engzelius; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2023)
      Efficient feeding and dissolution of alumina are necessary in order to maintain a stable Hall–Héroult process. One dose of alumina contains several thousand grains, and simulating the motion of individual particles is in ...

    • Modeling Viscosity of High Titania Slag 

      Hu, Kai; Tang, Kai; Lv, Xuewei; Safarian, Jafar; Yan, Zhiming; Song, Bing (Peer reviewed; Journal article, 2020)
      TiO2-FeO-Ti2O3 slag system is the dominant system for industrial high-titania slag production. In the present work, viscosities of TiO2-FeO and TiO2-FeO-Ti2O3 systems were experimentally determined using the concentric ...