Blar i Institutt for materialteknologi på tidsskrift "Metallurgical and Materials Transactions B"
Viser treff 21-40 av 41
-
Nucleation of SiO2-CaO-Al2O3 Slag in Oxidative Ladle Refining of Metallurgical Grade Silicon
(Peer reviewed; Journal article, 2021)Oxidative ladle refining (OLR) is the most used refining method in industrial production of metallurgical grade silicon. OLR is performed by purging the liquid alloy with oxygen-enhanced air at 1823 K to 1873 K, reacting ... -
On the phosphorus evaporation from liquid silicon by Knudsen effusion mass spectrometry
(Peer reviewed; Journal article, 2022)Silicon refining for solar applications is intensively on demand, and removal of phosphorus from Si is one of the most challenging steps. Evaporation of P from liquid Si in a vacuum refining process is the most efficient ... -
On the Production of W–Fe–B Ternary Compounds by Self-propagating High-Temperature Synthesis
(Peer reviewed; Journal article, 2022)In this study, one-step production of W2FeB2 and WFeB compounds from oxide raw materials was carried out through cost-effective and energy-efficient aluminothermic self-propagating high-temperature synthesis (SHS). ... -
Oxidation and Fume Formation from Liquid Silicomanganese Alloys Exposed to Atmospheres Containing Moisture
(Peer reviewed; Journal article, 2022)In industrial applications and laboratory studies, it has been shown that the use of water spray may significantly reduce the amount of fume generated from the oxidation process of liquid high carbon ferromanganese alloy. ... -
Oxidative Refining of Metallurgical Grade Silicon: Lab-Scale Measurements on the Overarching Refining Behavior of Ca and Al
(Peer reviewed; Journal article, 2022)Oxidative ladle refining (OLR) is the most widely used refining process for removal of dissolved Ca and Al in the industrial production of metallurgical grade silicon (MG-Si). Refining occurs by purging the silicon alloy ... -
Phase Distribution During Slag Formation in Mn Ferroalloy Production
(Peer reviewed; Journal article, 2022)Phase development during slag formation and reduction of Comilog and Assmang ores in a setup that simulates the conditions in an industrial SAF process under different coke bed temperatures, 1473 K (1200 °C), 1673 K (1400 ... -
Phase transformations in quartz used in silicon and ferrosilicon
(Peer reviewed; Journal article, 2021)Different quartz types are used as raw material for silicon and ferrosilicon production. Upon heating, the quartz will experience phase transformations to other silica polymorphs. In this study the phase transformation ... -
Pre-reduction of United Manganese of Kalahari Ore in CO/CO<inf>2</inf>, H<inf>2</inf>/H<inf>2</inf>O, and H<inf>2</inf> Atmospheres
(Peer reviewed; Journal article, 2023)The incorporation of hydrogen, which is a relatively unexplored reductant used during ferromanganese (FeMn) production, is an attractive approach to lessen atmospheric gaseous carbon release. The influence of hydrogen on ... -
Prereduction Behavior of Manganese Ores With Solid Carbon and in CO/CO<inf>2</inf> Gas Atmosphere
(Peer reviewed; Journal article, 2022)The prereduction reactions in the submerged arc furnace (SAF) are highly decisive of the total carbon, and energy consumption of the ferromanganese process. Therefore, understanding the dependency of prereduction behavior ... -
Production Rate of SiO Gas from Industrial Quartz and Silicon
(Peer reviewed; Journal article, 2021)The production rate of SiO gas from industrial quartz and silicon has been investigated by isothermal heat treatment experiments. Mixtures of silicon and different quartz samples have been heated to temperatures ranging ... -
A Raman-Structure Model for the Viscosity of SiO2- CaO-Al2O3 System
(Peer reviewed; Journal article, 2022)The relationship between structure and viscosity of molten slags is investigated using the Raman spectroscopy technique. To this end, a group of 20 synthetic slags in the SiO2-CaO-Al2O3 ternary system is considered. The ... -
Reaction Rate Analysis of Manganese Ore Prereduction in CO-CO2 Atmosphere
(Peer reviewed; Journal article, 2021)Variations in energy efficiency and climate gas emissions in production of manganese ferroalloys are largely related to the solid-state reduction of the manganese ores used as raw material in the production. The gas-solid ... -
Recovery of Precious Metals (Au, Ag, Pt, and Pd) from Urban Mining Through Copper Smelting
(Peer reviewed; Journal article, 2020)With the aim of investigating deportments of precious metals in pyrometallurgical processing of waste electrical and electronic equipment, the distributions of selected precious metals (gold, silver, platinum, and palladium) ... -
Reduction of Manganese Ores in CO-CO2 Atmospheres
(Peer reviewed; Journal article, 2021)The reduction of higher manganese oxides to MnO in the prereduction zone of a ferromanganese furnace is largely decisive for the overall energy efficiency and climate gas emissions for the overall production process. ... -
A Review of Ferroalloy Tapping Models
(Peer reviewed; Journal article, 2021)Tapping is an important furnace operation in the ferroalloy industry and poses a number of complex and coupled challenges of both practical and economical importance. Owing to the hazardous high-temperature conditions ... -
Slag Properties in the Primary Production Process of Mn-Ferroalloys
(Peer reviewed; Journal article, 2021)The present study has investigated the influence of sulfur content in synthetic FeMn and SiMn from 0 to 1.00 wt pct on interfacial properties between these ferroalloys and slags. The effect of experimental parameters such ... -
Sn-Aided Joining of Cast Aluminum and Steel Through a Compound Casting Process
(Peer reviewed; Journal article, 2021)Obtaining a strong bond between aluminum and steel is challenging due to poor wettability between aluminum melt and steel and brittle intermetallic phases forming in the interface. In this research, a novel coating method, ... -
State of Reactions in Silicomanganese Smelting Process
(Peer reviewed; Journal article, 2022)Recent studies by Safarian et al. and Kim show that carbothermic smelting processes for SiMn alloys proceed by multiple reactions consisting of oxidation of carbon, simultaneous reduction of MnO and SiO2 species, and ... -
A Study of Bubble Behavior and Anode Effect on the Graphite and Industrial Carbon Anode in a See-Through Furnace During Aluminium Electrolysis
(Peer reviewed; Journal article, 2022)Anode gas bubble behavior and anode effect on graphite and industrial carbon rod-shaped anode in a cryolite melt have been studied using a see-through furnace. The different carbon materials have different properties which ... -
Synthesis and Characterization of 12CaO·7Al2O3 Slags: The Effects of Impurities and Atmospheres on the Phase Relations
(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 ...