Blar i Institutt for materialteknologi på tidsskrift "The Minerals, Metals & Materials Series"
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A Method for Assessment of Recyclability of Aluminum from Incinerated Household Waste
(Journal article; Peer reviewed, 2019)Aluminum is widely used in daily household consumable goods such as food and drink packaging materials, storage containers, etc. The disposal of such goods into household waste means that this waste stream contains a ... -
Adapting Modern Industrial Operation Parameters in a Standardized Laboratory Cell for Measuring Current Efficiency for Aluminium Deposition: Unexpected Challenges and Lessons Learned
(Journal article, 2020)“Current efficiency” is an important cell parameter which shows how efficiently current is used to produce aluminium. Operational parameters that affect current efficiency have been widely studied in the aluminium industry, ... -
Analysis of the Interplay Between Thermo-solutal Convection and Equiaxed Grain Motion in Relation to Macrosegregation Formation in AA5182 Sheet Ingots
(Peer reviewed; Journal article, 2019)Shrinkage induced flow, thermo-solutal convection and equiaxed grain motion are the major transport mechanisms contributing to macrosegregation formation in aluminum alloys produced through Direct Chill casting. Experimental ... -
Automated Metal Cleanliness Analyzer (AMCA) – An Alternative Assessment of Metal Cleanliness in Aluminum Melts
(Peer reviewed; Journal article, 2021)The established industry standards for assessing the cleanliness of aluminum melts are PoDFA (Porous Disc Filtration Apparatus) and LiMCA (Liquid Metal Cleanliness Analyzer) analyses. PoDFA provides the necessary qualitative ... -
Carbon cathode wear in aluminium electrolysis cells
(Journal article; Peer reviewed, 2019)Autopsies of six spent potlinings with different carbon cathode block grades, amperage regimes and cell technologies were conducted at three separate smelters to reveal possible mechanisms causing cathode wear. Microstructure ... -
CFD Study on Continuous Tapping of Silicon
(Peer reviewed; Journal article, 2022)Silicon is mostly produced in rotating submerged arc furnaces with continuous tapping of metal. The burden is often dense due to condensates. Thus, furnace gas does not escape easily to the top of the burden and some gas ... -
Characterization of industrial hydrocarbon samples from anode baking furnace off-gas treatment facility
(Peer reviewed; Journal article, 2023)Polycyclic aromatic hydrocarbons (PAHs) are naturally present in raw materials used as a binder in prebaked anodes for electrolysis of aluminum. Green anodes are baked to about 1200 °C through a cycle of 14–17 days where ... -
Compaction of aluminium foil and its effect on oxidation and recycling yield
(Peer reviewed; Journal article, 2021)One of the problems when recycling aluminium is its oxidation and consequent metal loss. This is especially critical for the thin sheet/foil materials used for food packaging applications. Compacting the scrap into briquettes ... -
Direct Production of Aluminum Manganese and Silicon Alloys in Aluminum Reduction Cells: A Laboratory Test
(Journal article, 2022)Aluminum smelters produce pure aluminum in reduction cells by the Hall-Héroult process but supply a variety of alloys to their customers. The alloys are produced in the cast house, as master alloys containing the desired ... -
Direct Production of Aluminum Titanium Alloys in Aluminum Reduction Cells: A Laboratory Test.
(Journal article, 2022)Aluminum smelters produce pure aluminum in reduction cells by the Hall-Héroult process, however, aluminum is usually supplied as a variety of alloys to their customers. The alloys are produced in the casthouse, as desired ... -
Discussion of bi-film index and LiMCA data in industrial aluminum remelting trials
(Journal article; Peer reviewed, 2018)The trend in the aluminum high end market is to set unrealistic quality requirements e.g. inclusion free metal. The importance of quality and the ability to measure is growing. LiMCA is a unique, well-established tool for ... -
Dissolution Characteristics and Concentration Measurements of Alumina in Cryolite Melts
(Peer reviewed; Journal article, 2021)Alumina dissolution is one of the most important processes in the Hall-Héroult process. In this work, video recording using a high-speed camera and a see-through cell and electromotive force (emf) based alumina sensor ... -
Dynamic Current and Power Distributions in a Submerged Arc Furnace
(Journal article; Peer reviewed, 2019)Most submerged arc furnaces used for the production of ferroalloys run on three-phase alternating current. This affects the electrical operation of the furnace and thus it is of interest to study alternating current ... -
Effect of Compaction and Thermal De-coating Pre-treatments on the Recyclability of Coated and Uncoated Aluminium
(Journal article, 2022)Scrap pre-treatments, such as compaction and thermal de-coating, are standard industrial practices for recycling aluminium post-consumer scrap. This study compares the recyclability of a coated and uncoated 8111 alloy under ... -
Electrochemical Reduction of Iron Oxides in Aqueous NaOH Electrolyte Including Iron Residue from Nickel and Zinc Electrowinning Processes
(Journal article, 2022)Experiments were carried out in NaOH-H2O (50–50 wt%) electrolyte with a suspension of Fe2O3 particles at ~100 ℃. A rotating disk electrode of graphite or silver was used as the cathode. The current efficiency for iron ... -
Evaporation and diffusion of Mn in inert systems
(Journal article; Peer reviewed, 2018)This research is aimed to improve our knowledge on the dust formation and clustering in the ferroalloy industry. Specifically, this paper focuses on the evaporation of manganese metal, and how different parameters influence ... -
Formation of Carbon Build-Up on the Flue Wall of Anode Baking Furnace
(Journal article; Peer reviewed, 2017)A hard carbon build-up layer often forms on the flue wall surface in anode baking furnaces. The layer accumulates over thermal circles and needs to be mechanically removed regularly to ensure sufficient space for the anodes ... -
Furnace Atmosphere and Dissolved Hydrogen in Aluminium
(Peer reviewed; Journal article, 2019)Hydrogen solubility is much higher in liquid than in solid aluminium. Therefore, if the hydrogen concentration in liquid aluminium is too high prior to solidification, there is high risk of gas porosity formation during ... -
Impact of inlet flow on macrosegregation formation accounting for grain motion and morphology evolution in DC casting of aluminium
(Peer reviewed; Journal article, 2018) -
Influence of Cryolite Content on the Thermal Properties and Coalescence Efficiency of NaCl-KCl salt flux
(Peer reviewed; Journal article, 2023)Salt fluxes with fluoride additions are necessary for the treatment and recycling of contaminated or oxidized aluminium scrap. This study aims to investigate the effect of cryolite additions on the thermal properties and ...