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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pownceby, Mark
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Topics
Publications (14/14 displayed)
- 2023Experimental phase equilibria and liquidus of CaO-Al2O3-SiO2-Na2O-B2O3 slags relevant to e-waste processing
- 2023Deportment of metals from e-waste PCBs towards alloy and slag phases during smelting using CaO-Al2O3-SiO2-B2O3 slagscitations
- 2022Effect of B2O3 on the Liquidus Temperature and Phase Equilibria in the CaO–Al2O3–SiO2–B2O3 Slag System, Relevant to the Smelting of E-wastecitations
- 2021Phase equilibria study of CaO-Al2O3-SiO2-Na2O slags for smelting waste printed circuit boardscitations
- 2021Characterisation of SFCA phases in iron ore sinter by combined optical microscopy and electron probe microanalysis (EPMA)
- 2021Characterisation of SFCA phases in iron ore sinter by combined optical microscopy and electron probe microanalysis (EPMA)
- 2021Experimental determination of liquidus temperature and phase equilibria of the CaO-Al2O3-SiO2-Na2O slag system relevant to e-waste smeltingcitations
- 2021Beneficiation of low-grade, goethite-rich iron ore using microwave-assisted magnetizing roastingcitations
- 2021Automated Optical Image Analysis of Iron Ore Sintercitations
- 2019Characterisation of phosphorus and other impurities in goethite-rich iron ores – Possible P incorporation mechanismscitations
- 2016Development of a niobium-doped titania inert anode for titanium electrowinning in molten chloride saltscitations
- 2014Effect of sintering conditions on the formation of mineral phases during iron ore sintering with New Zealand ironsand
- 2013In situ X-ray and neutron diffraction studies of silico-ferrite of calcium and aluminium iron ore sinter phase formation
- 2011In situ diffraction studies of phase formation during iron ore sintering
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document
Characterisation of SFCA phases in iron ore sinter by combined optical microscopy and electron probe microanalysis (EPMA)
Abstract
Iron ore sinter mineralogy and its associated macro-/micro – structure has a strong impact on sinter quality. At a macroscopic scale, sinter ideally consists of a strong, porous matrix which bonds relict ore nuclei together. Microscopically, the sinter matrix (solidified from the melt part of the initial sinter mix) generally consists of complex calcium ferrites known as SFCA, secondary magnetite and hematite grains (precipitated from the primary sinter melt), glass and silicates. Depending on the conditions under which the sinter structure is formed, two major forms of SFCA with different morphologies are generally recognised, ie fine micro-platy SFCA (usually termed SFCA-I) and coarse columnar/prismatic SFCA. Detailed optical microscope observations of several pot grate and compact sinter samples revealed the presence of a variety of fine, coarse and dense forms of both types of SFCA. The controlled cooling tests revealed that cooling rate has an impact on the form and size of SFCA crystals. In this work, EPMA analysis of SFCA compositions from a variety of pot grate and compact sinter samples are presented. Results show that the SFCA types exhibit a broad range of complex compositions within the system Fe2O3/CaO/SiO2/Al2O3/MgO/TiO2/MnO2. Although SFCA-I and SFCA are known to be crystallographically distinct and with different, well-defined ranges in composition, there was considerable overlap in compositions of the experimental sinter samples. The development of SFCA textures depend on several parameters including the local chemistry and conditions including the maximum temperature attained and the cooling rate, within the sinter bed, thereby suggesting that SFCA identification based on morphology alone may be erroneous.