A5012999233- Bauxite Residue and Utilization
- Extraction and Separation Processes
- Aluminum Alloys Composites Properties
- Molten salt chemistry and electrochemical processes
- Recycling and utilization of industrial and municipal waste in materials production
- Aluminum Alloy Microstructure Properties
- Metal Extraction and Bioleaching
- Metallurgical Processes and Thermodynamics
- Iron and Steelmaking Processes
- Chemical and Physical Properties in Aqueous Solutions
- Advanced ceramic materials synthesis
- Metallurgy and Material Science
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Clay minerals and soil interactions
- Remote-Sensing Image Classification
- Ionic liquids properties and applications
- Concrete and Cement Materials Research
- Soil Geostatistics and Mapping
- Membrane-based Ion Separation Techniques
- Radioactive element chemistry and processing
- Renal function and acid-base balance
- Magnesium Oxide Properties and Applications
- Mine drainage and remediation techniques
- Advanced materials and composites
National Technical University of Athens
2015-2025
Agios Pavlos General Hospital
2021
Stavros Niarchos Foundation
2021
KU Leuven
2017
Swedish University of Agricultural Sciences
2017
British Geological Survey
2017
Geological Survey of Finland
2017
Outokumpu (Finland)
2017
National Taiwan University of Arts
2012
The scope of this work is to develop and optimize a reductive roasting process followed by wet magnetic separation for iron recovery from bauxite residue (BR). aim the transformation nonmagnetic phases found in BR (namely hematite goethite), ones such as magnetite, wüstite, metallic iron. can be fractionated second stage through separation, forming valuable concentrate leaving containing rare earth elements among other constituents. BR-roasting has been modeled using thermochemical software...
The behavior of platinum group metals (PGMs) during their recovery with smelting spent automotive ceramic catalysts powder in the presence metallic copper at elevated temperatures is studied this paper.Two different metal mechanisms proved to be active process: 1) Wetting micro-dispersed particulates PGMs slag by molten copper, formation droplets attracted microparticles and settling Cu-PGMs alloy through bottom crucible ("wetting"); 2) Settling solid a solution ("settling").The are divided...
Scandium (Sc) has various technological applications, but the concentrations of Sc in ores are low. Both, mining low concentrated and production industrial-grade a heavy burden on environment. Bauxite residue (BR) from alumina represents one major sources Europe (Ochsenkühn-Petropulu et al., 1994). The goal this study is to assess environmental impacts cradle gate novel route developed Aluminium project (SCALE) extract at < 100 ppm BR, concentrate upgrade it pure ScF3 Sc2O3 ultimately refine...
Carbonation precipitation processes have been widely used due to their numerous applications in a wide range of fields. The complexity these lies within the interplay transport phenomena, multiphase flows, chemical reactions, and solid precipitation, deeming experimental analysis in-depth mechanistic understanding process dynamics rather challenging task. In this work, three-dimensional CFD model is developed, focusing on carbonation step process, taking into account flow liquid solution...
Abstract Metallurgical grade alumina is produced worldwide through the well-known Bayer process, which unavoidably generates bauxite residue (BR, also known as red mud) in almost equal amounts to alumina. This study aims valorization of BR a smelting-reduction process obtain calcium aluminate slags that can be proper feed for recovery via Pedersen process. It investigates thermodynamics and characteristics pig iron from mixtures BR, beneficiation byproduct, lime. In this context, evolution...
Numerous European industries are heavily dependent on imported rare earth element (REE) raw materials. This has created a need for the Union (EU) to ensure sustainable supply of REE minerals, as well develop from ground up currently non-existent extraction and processing industry. In order support this, Commission, through Seventh Framework Programme (FP7) scheme, funded EURARE project which runs 1st January 2013 31st December 2017. Through project, selected deposits have been researched in...
Primary iron metallurgy is characterised by significant direct carbon dioxide emissions, due to the carbothermic reduction of ore. This paper deals with electrification primary production developing a new and innovative process for carbon-free metallic from bauxite residue which byproduct alumina industry. It based on electroreduction oxides suspensions in concentrated sodium hydroxide solutions, at low temperature normal pressure. The oxide source used present study provided MYTILINEOS SA,...
Abstract The Bayer Process is the dominant industrial method to produce alumina from bauxite ore. Due generation of large amounts Bauxite Residue (red mud), an alternative method, called Pedersen Process, our interest. This process makes use a combination pyrometallurgical and hydrometallurgical techniques in order prevent generation. In conventional iron separated form pig through carbothermic smelting-reduction step which has CO 2 emission similar that during production. eliminate this...
The increasing demand for aluminum in conjunction with the limited available bauxite deposits Europe results dire need evaluation of alternative raw materials whole value chain alumina production. present paper focuses on possible use nepheline syenite, originated as a mine byproduct, production through leaching an azeotropic HCl solution. Previous work syenite dissolution focused more extraction potassium and sodium values. In this work, emphasis is given at characteristics leachability...
There is a growing interest in the characterization of mining residues, both for environmental assessments and critical raw materials recovery. The lack sufficient situ samples hampers an effective geostatistical modelling material concentrations variability. This paper proposes method to characterize aluminum spatial variability mine residue from remote sensing data imprecise information daily dumping procedures. proposed mapping within Greek bauxite residue, using Sentinel-2 imagery....
Scandium, a valuable element with restricted production sources mainly situated in China and Russia, is typically obtained as by-product during the of various materials. As demand for scandium grows expanding aluminum fuel cell industries, significant investments rare earth mining USA Australia, there need to explore alternative recovery sources. This research investigates from an acid pregnant leaching solution using ion exchange resins. The was after bauxite residue sulfuric acid....
In this study an integrated process is presented as a suitable method to transform Fe3+ oxides present in bauxite residue into magnetic and metallic iron through microwave roasting reduction, avoiding the formation of hercynite (FeAl2O4). first step, all alumina phases were transformed sodium aluminates by adding carbonate flux BR then leached out alkali-leaching recover alumina. Subsequently, leaching was mixed with carbon roasted using furnace at optimum conditions. The oxide sinter...