Blar i NTNU Open på forfatter "Safarian, Jafar"
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Aluminothermic reduction of manganese oxide from selected mno-containing slags
Kudyba, Artur; Akhtar, Shahid; Johansen, Inge; Safarian, Jafar (Peer reviewed; Journal article, 2021)The aluminothermic reduction process of manganese oxide from different slags by aluminum was investigated using pure Al and two types of industrial Al dross. Two types of MnO-containing slags were used: a synthetic highly ... -
Aluminum Recovery from White Aluminum Dross by a Mechanically Activated Phase Separation and Remelting Process
Kudyba, Artur; Akhtar, Shahid; Johansen, Inge; Safarian, Jafar (Journal article; Peer reviewed, 2021)The aluminum recovery from white aluminum dross by a mechanical treatment and sizing followed by remelting process was investigated. The dross was subjected to a ball mill, and the obtained particles were sized in different ... -
AMADEUS: Next generation materials and solid state devices for ultra high temperature energy storage and conversion
Datas, Alejandro; Cristobal, Ana Belen; del Cañizo, Carlos; Antolin, Elisa; Beaughon, Michel; Nikolopoulos, Nikolaos; Nikolopoulos, Aristeidis; Zeneli, Myrto; Sobczak, Natalia; Polkowski, Wojciech; Tangstad, Merete; Safarian, Jafar; Trucchi, Daniele M; Bellucci, Alessandro; Girolami, Marco; Marx, Roman; Bestenlehner, Dominik; Lang, Stephan; Vitulano, Aniello; Sabbatella, Gianfranco; Marti, Antonio (Journal article; Peer reviewed, 2018)Starting in January 2017, AMADEUS (www.amadeus-project.eu) is the first project funded by the European Commission to research on a new generation of materials and solid state devices for ultra-high temperature energy storage ... -
BORON REMOVAL FROM MOLTEN SILICON BY GAS BLOWING USING DIFFERENT GAS MIXTURES
Sanna, Claudio (Master thesis, 2016)- -
Boron Removal from Silicon by Moisturized Gases
Safarian, Jafar; Sana, Claudio; Tranell, Gabriella (Chapter, 2017)The photovoltaic (PV) industry is in rapid growth and a large supply of PV feedstock materials must be provided to maintain this growth. Since silicon is still the dominant material for the fabrication of solar cells, ... -
Boron Removal from Silicon Melt by gas Blowing Technique
Hoseinpur Kermani, Arman; Andersson, Stefan; Müller, Michael; Tang, Kai; Safarian, Jafar (Peer reviewed; Journal article, 2022)Due to the detrimental effects of boron (B) on the efficiency of silicon (Si) photovoltaic cells, complete boron removal from Si is necessary to produce solar grade Si (SoG–Si, with a maximum limit of 0.1 ppmw boron). Gas ... -
BORON REMOVAL FROM SILICON USING GAS REFINING AND DIFFERENT CRUCIBLE MATERIALS
Bhat, Akshay (Master thesis, 2016)- -
Bærekraftig Gjenvinning av Metaller fra Manganslam via Syreleaching
Eini, Ariel Skaug.; Pedersen, Markus Antonius Elinsønn. (Bachelor thesis, 2022)I oppgaven ble effekten av ulike forsøksparametere på metallutbyttet fra leaching av manganslam undersøkt. Det ble gjort ved å syreleache 13 prøver hvor noen av parameterne ble holdt like og noen ble variert. Tre forskjellige ... -
Characteristics of Calcium-Aluminate Slags and Pig Iron Produced from Smelting-Reduction of Low-Grade Bauxites
Azof, Fabian Imanasa; Kolbeinsen, Leiv; Safarian, Jafar (Journal article; Peer reviewed, 2018)Low-grade bauxite ores are not favorable in the conventional Bayer process for alumina production, as they are producing more bauxite residue (red mud) and accompanying lower alumina yield than high-grade ores. In the ... -
Characterization of Polymetallic Manganese Nodules and Reduction by Hydrogen and Methane
Brustad, Ole Kristian; Låstad, Jonas (Bachelor thesis, 2022)Feltet havbunns gruvedrift har blitt utforsket siden 1800-tallet, med stor utvikling rundt 1970- tallet. P˚a grunn av en økning i etterspørselen etter verdifulle metaller slik som kobber, kobolt og nikkel har dette feltet ... -
Duplex Process to Produce Ferromanganese and Direct Reduced Iron by Natural Gas
Safarian, Jafar (Peer reviewed; Journal article, 2021)The application of natural gas instead of solid carbon to produce ferromanganese is a way forward in sustainable development. Mass and energy balances for an integrated duplex process to produce ferromanganese and direct ... -
Effect of acid leaching conditions on impurity removal from silicon doped by magnesium
Espelien, Stine; Safarian, Jafar (Journal article; Peer reviewed, 2017)The effect of magnesium addition into a commercial silicon and its leaching refining behavior is studied for producing solar grade silicon feedstock. Two different levels of Mg is added into a commercial silicon and the ... -
Effect of Magnesium Addition on Removal of Impurities from Silicon by Hydrometallurgical Treatment
Espelien, Stine; Tranell, Gabriella; Safarian, Jafar (Chapter, 2017)Hydrometallurgical treatment of silicon is an effective process for the removal of metallic impurities for producing solar grade silicon feedstock. In the present research, the removal of impurities from silicon is studied ... -
Effect of Magnesium Addition on Removal of Impurities from Silicon by Hydrometallurgical Treatment
Espelien, Stine; Tranell, Gabriella; Safarian, Jafar (Chapter, 2017)Hydrometallurgical treatment of silicon is an effective process for the removal of metallic impurities for producing solar grade silicon feedstock. In the present research, the removal of impurities from silicon is studied ... -
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 ... -
Ekstraksjon av sjeldne jordarter fra "grey mud" ved bruk av saltsyre
Salvesen, Malin (Master thesis, 2019)Bayer prosessen som brukes til produksjon av aluminiumoksid er ikke veldig bærekraftig på grunn av stor produksjon av avfallet rødslam. Dette avfallet skaper miljutfordringer på grunn av sin nødvendige lagring på land. En ... -
Evaluation of Calcium Aluminate Slags and Pig Irons Produced from the Smelting-Reduction of Diasporic Bauxite
Lazou, Adamantia; Kolbeinsen, Leiv; Safarian, Jafar (Peer reviewed; Journal article, 2021)This work evaluates the characteristics of calcium aluminate slag and pig iron samples obtained from the smelting of calcined and reduced diasporic bauxite ore. The study is conducted in the Pedersen process framework, ... -
High temperature interaction between Si–B alloys and Si3N4
Jiao, Jian Meng; Tang, Kai; Safarian, Jafar; Grorud, Bettina; Sellevoll, Kathrine; Tangstad, Merete (Peer reviewed; Journal article, 2021)Si3N4 is a candidate crucible material for Si–B alloys in high temperature thermal energy storage system. In this regard, the phase formation in the Si–B alloys and the interaction between the alloys and Si3N4 were ... -
High Temperature Interaction of Si-B Alloys with Graphite Crucible in Thermal Energy Storage Systems
Jiao, Jianmeng; Safarian, Jafar; Grorud, Bettina; Tangstad, Merete (Journal article; Peer reviewed, 2019)Si-B alloys are proposed as a potential phase change material (PCM) in the novel high temperature thermal energy storage systems. For successfully introducing the new PCM, the selection of proper refractory material in the ... -
Hydrogen-Based Iron Recovery from Bauxite Residue
Velle, Sander Ose; Vollan, Frida; Skibelid, Olivia Bogen (Bachelor thesis, 2022)Valorisering av bauksittavfall er essensielt for bærekraftig produksjon av aluminium, og undersøkes videre i denne bacheloroppgaven. Hydrogenreduksjon av jernoksider i en blanding av bauksitt-avfall og kalkstein ble studert ...