Blar i SINTEF Industri på forfatter "Tangstad, Merete"
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Pilot Scale Production of Manganese Ferroalloys Using Heat-Treated Mn-Nodules
Tangstad, Merete; Ringdalen, Eli; Manilla, Edmundo; Davila, Daniel (Peer reviewed; Journal article, 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 ... -
Reaction Rate Analysis of Manganese Ore Prereduction in CO-CO2 Atmosphere
Larssen, Trine Asklund; Senk, Dieter Georg; Tangstad, Merete (Peer reviewed; Journal article, 2021) -
Reduction and Dissolution Behaviour of Manganese Slag in the Ferromanganese Process
Li, Xiang; Tang, Kai; Tangstad, Merete (Journal article; Peer reviewed, 2020)The reduction and liquidus behaviour of manganese slag with different basicities were studied in non-isothermal experiments in the temperature range of 1400–1500 °C. Certain amounts of quartz were added to Assmang ore ... -
SiC crystalline micro bullets on bio-carbon based charcoal substrate
Jayakumari, Sethulakshmy; Vullum, Per Erik; Van Helvoort, Antonius; Tangstad, Merete (Peer reviewed; Journal article, 2020)Silicon carbide (SiC) micro bullets were grown on a bio-carbon based charcoal substrate, the morphology and crystal structure were analyzed. In order to collect the crystallographic details scanning electron microscopy ... -
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 ... -
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 ... -
Slag Properties in the Primary Production Process of Mn-Ferroalloys.
Tangstad, Merete; Bublik, Sergey; Haghdani, Shokouh; Einarsrud, Kristian Etienne; Tang, Kai (Peer reviewed; Journal article, 2021)The thermodynamic and kinetic properties of the carbothermic reduction of MnO in the five-component slag, MnO-SiO2-CaO-MgO-Al2O3, is critical in the production process of Mn-ferroalloys. While the reduction rate is mainly ... -
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 ... -
Thermodynamic and Kinetic Behavior of B and Na Through the Contact of B-Doped Silicon with Na2O-SiO2 Slags
Safarian-Dastjerdi, Jafar; Tranell, Gabriella; Tangstad, Merete (Peer reviewed; Journal article, 2013)Boron (B) is the most problematic impurity to be removed in the processes applied for the production of solar grade silicon. Boron removal from liquid silicon by sodium-silicate slags is experimentally studied and it is ... -
The Use of Eutectic Fe-Si-B Alloy as a Phase Change Material in Thermal Energy Storage Systems
Jiao, Jianmeng; Grorud, Bettina; Sindland, Caroline; Safarian, Jafar; Tang, Kai; Sellevoll, Kathrine; Tangstad, Merete (Journal article; Peer reviewed, 2019)Fe-26.38Si-9.35B eutectic alloy is proposed as a phase change material (PCM) as it exhibits high latent heat, high thermal conductivity, moderate melting point, and low cost. For successful implementation of it in the ... -
The use of hydrogen as a potential reductant in the chromite smelting industry
Davies, Jamey; Paktunc, Dogan; Ramos-Hernandez, José Juan; Tangstad, Merete; Ringdalen, Eli; Beukes, Johan P.; Bessarabov, Dmitri G.; Du Preez, Stephanus P. (Peer reviewed; Journal article, 2022)The chromium (Cr) content of stainless steel originates from recycled scrap and/or ferrochrome (FeCr), which is mainly produced by the carbothermic reduction of chromite ore. Ever-increasing pressure on FeCr producers to ...