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 ... -
Beneficiation of fluxed titaniferous slag to a marketable titania product using the modified upgraded slag process
Goso, Xolisa; Petersen, Jochen; Tangstad, Merete; Safarian, Jafar (Peer reviewed; Journal article, 2021)Smelting production of a limestone-fluxed titaniferous slag with low MgO content for subsequent beneficiation using the modified Upgraded Slag (UGS) process was investigated, with the aim of producing a marketable titania ... -
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 ... -
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. ... -
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 ... -
Characterization, Calcination and Pre-Reduction of Polymetallic Manganese Nodules by Hydrogen and Methane
Brustad, Ole Kristian; Låstad, Jonas; Hoseinpur Kermani, Arman; Safarian, Jafar (Peer reviewed; Journal article, 2022)A polymetallic manganese nodule was characterized and further calcined and pre-reduced by H2, CH4, and H2-CH4 mixtures at elevated temperatures. It was found that the main Mn and Fe elements coexisted in the ore in different ... -
Comparative kinetics study of different iron-containing pellets with hydrogen at isothermal conditions
Kar, Manish Kumar; Zhu, Mengyi; Safarian, Jafar (Peer reviewed; Journal article, 2023)Using hydrogen to produce iron is a promising way for the steel industry to achieve the goal of carbon neutrality. The reducibility of iron-bearing oxides by hydrogen significantly impacts the productivity and energy ... -
Comparative Study of Hydrogen Reduction of Bauxite Residue-Calcium Sintered and Self-Hardened Pellets Followed by Magnetic Separation for Iron Recovery
Kar, Manish Kumar; Hassanzadeh, Ahmad; Eijk, Casper van der; Safarian, Jafar (Journal article; Peer reviewed, 2023)To minimize the carbon footprint in the industrial valourization of bauxite residue, hydrogen was used as a reducing agent. The current study experimentally investigated hydrogen reduction of bauxite residue-CaO sintered ... -
Computational reacting flow models for the pre-reduction of lumpy Nchwaning manganese ore with hydrogen
Khama, Mopeli; Reynolds, Q.G.; Xakalashe, B.X.; Sarkar, Alok; Safarian, Jafar (Peer reviewed; Journal article, 2024) -
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 ... -
The Effect of Process Conditions on Sulfuric Acid Leaching of Manganese Sludge
Safarian, Jafar; Eini, Ariel Skaug; Pedersen, Markus Antonius Elinsønn; Haghdani, Shokouh (Peer reviewed; Journal article, 2023)Manganese sludge, an industrial waste product in the ferroalloy industry, contains various components and holds significant importance for sustainable development through its valorization. This study focuses on characterizing ...