Browsing NTNU Open by Author "Kar, Manish Kumar"
Now showing items 1-7 of 7
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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 ... -
An Investigation on Reduction of Calcium Added Bauxite Residue Pellets by Hydrogen and Iron Recovery through Physical Separation Methods
Hassanzadeh, Ahmad; Kar, Manish Kumar; Safarian, Jafar; Kowalczuk, Przemyslaw Boguslaw (Peer reviewed; Journal article, 2023)This study investigates the properties of H2-reduced calcium-added bauxite residue, self-hardened pellets, and the feasibility of iron recovery through electrostatic and magnetic separation methods. The oxide pellets are ... -
An Invitation on Characterization of H<inf>2</inf>-Reduced Bauxite Residue and Recovering Iron through Wet Magnetic Separation Processes
Hassanzadeh, Ahmad; Pilla, Ganesh; Kar, Manish Kumar; Kowalczuk, Przemyslaw Boguslaw (Peer reviewed; Journal article, 2023)Recovering iron from the bauxite residue (BR) is one of the long-standing challenges in the mining industry. However, there is a substantial lack of information in the literature regarding sample properties and iron ... -
Iron and alumina recovery from bauxite residue through hydrogen reduction
Kar, Manish Kumar (Doctoral theses at NTNU;2024:183, Doctoral thesis, 2024)The study primarily centers on agglomerating bauxite residue with calcite pellets and reducing in the presence of hydrogen. This process aims to reduce iron oxide complexes while simultaneously forming leachable calcium ... -
Kinetics Study on the Hydrogen Reduction of Bauxite Residue-Calcite Sintered Pellets at Elevated Temperature
Kar, Manish Kumar; Eijk, Casper van der; Safarian, Jafar (Peer reviewed; Journal article, 2023)In this study, the isothermal reduction of bauxite residue-calcite sintered pellets by hydrogen at elevated temperatures and different gas flow rates was investigated. A thermogravimetric technique was applied to study the ... -
Leaching of Hydrogen Pre-Reduced Mn ore to Produce MnO2
Shakya, Utsav; Knive, Haldor Andersen (Bachelor thesis, 2023)HAlMan project team har som mål å utvikle en bærekraftig metode for produksjon av mangandioksid (MnO2). De jobber også med produksjon av manganholdige legeringer for stål og aluminium i tillegg til å utforske ekstraksjon ...