Blar i NTNU Open på forfatter "Azof, Fabian Imanasa"
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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 ... -
Kinetics of the leaching of alumina-containing slag for alumina recovery
Azof, Fabian Imanasa; Kolbeinsen, Leiv; Safarian, Jafar (Chapter, 2019)The leaching kinetics of an alumina-containing slag produced from the smelting-reduction of low-grade bauxite, which contained a significant amount of iron and low levels of SiO2 and TiO2, is studied. The leaching rates ... -
Leaching characteristics and mechanism of the synthetic calcium-aluminate slags for alumina recovery
Azof, Fabian Imanasa; Yang, Yongxiang; Panias, Dimitrios; Kolbeinsen, Leiv; Safarian, Jafar (Journal article; Peer reviewed, 2019)The leaching characteristics and mechanism of synthetic CaO-Al2O3 slags in alkaline solution at atmospheric pressure have been studied. The purpose of the study is to have a better understanding of the leaching part of the ... -
Leaching kinetics and mechanism of slag produced from smelting-reduction of bauxite for alumina recovery
Azof, Fabian Imanasa; Safarian, Jafar (Peer reviewed; Journal article, 2020)In the present study, we investigate the kinetics and mechanism of the leaching of calcium aluminate slag in Na2CO3 solution for alumina recovery. The slag consists of leachable phases, e.g., 12CaO·7Al2O3, CaO·Al2O3, ... -
Pyrometallurgical and Hydrometallurgical Treatment of Calcium Aluminate-containing Slags for Alumina Recovery
Azof, Fabian Imanasa (Doctoral theses at NTNU;2020:82, Doctoral thesis, 2020)The pyrometallurgical and hydrometallurgical part of the Pedersen process has been studied. The process can be seen as one of the most potent alternative processes to recover alumina from bauxite more sustainably than the ... -
Synthesis and Characterization of 12CaO·7Al2O3 Slags: The Effects of Impurities and Atmospheres on the Phase Relations
Azof, Fabian Imanasa; Tang, Kai; You, Jinglin; Safarian, Jafar (Journal article; Peer reviewed, 2020)Synthesis of crystalline slags of 12CaO·7Al2O3 phase from the corresponding melt compositions in different atmospheric conditions and different purities is investigated. Observations using a thermogravimetry coupled with ... -
The leachability of a ternary CaO-Al2O3-SiO2 slag produced from smelting-reduction of low-grade bauxite for alumina recovery
Azof, Fabian Imanasa; Vafeias, Michail; Panias, Dimitrios; Safarian, Jafar (Journal article; Peer reviewed, 2019)A combination of smelting-reduction of bauxite and leaching treatment of the produced slag for alumina recovery is known as the Pedersen process. The process is considered to be more sustainable for producing metallurgical-grade ... -
The Leachability of Calcium Aluminate Phases in Slags for the Extraction of Alumina
Azof, Fabian Imanasa; Safarian, Jafar; Kolbeinsen, Leiv (Journal article, 2017)Alumina is used primarily as feedstock for aluminum production. It occurs naturally in bauxite and clay and other minerals, and can be concentrated in industrial by-products such as coal gangue, fly ash, blast furnace slag, ...