magnetite sintering systems

Review on the Oxidation Behaviors and Kinetics
Abstract. One possible route for ironmaking process is using a hydrogen-gas-based fluidized bed to produce direct reduced iron (DRI), which allows to use the natural magnetite directly in particle scale. The magnetite particles are
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Mechanisms in oxidation and sintering of magnetite iron ore
2008.4.9 Sintering started earlier in the magnetite phase (950 °C) compared to the hematite phase (1100 °C). The sintering rate increased with increasing fineness in the
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Experimental Study on Oxygen-Enriched Sintering - ProQuest
In addition, iron ore powder used during sintering is mainly magnetite (Fe 3 O 4). After oxygen-enriched sintering, the oxidizing atmosphere increases during sintering, and some Fe 3 O 4 is
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Influence of magnetite concentrate morphology on
2023.9.1 Abstract. This study investigates the influence of the morphology of concentrate on the oxidation and sintering rates of magnetite pellets during induration and its impact on the
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Particle migration behavior between TiO2 and magnetite
2023.2.15 Vanadium‑titanium magnetite can be used effectively by sintering and pelletizing. A number of previous studies have demonstrated that the amount of liquid phase
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Sintering Fundamentals of Magnetite Alone and Blended
This work overviews the properties and sintering behaviour of Chinese magnetite concentrates, and inter-actions between magnetite concentrates and imported hematite, hematite/goethite
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High-temperature and High-pressure Sintering Method to
2024.11.11 In this study, we developed an efficient method for preparing chemically homogeneous magnetite (MtTR-1) without adding a binder. The initial magnetite powder (d90
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Magnetite Carbon-Free Sintering Process Based on
2020.1.24 In order to reduce energy consumption and pollution in the existing sintering process, it was developed as Magnetite carbon-free sintering process based on
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Effect of Magnetite on Mineral Phase Formation in Sintering
The effect of magnetite on mineral phase formation behavior was examined by sintering experiments under different atmospheres and sinter temperatures. Results can be
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Recent advances in sintering with high proportions of magnetite ...
2017.12.27 Magnetite concentrate is typically high in Fe grade and releases extra heat when oxidized to hematite. This will not only improve the sinter quality but also have a
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Effect of Preformed Calcium Ferrite Addition on Sintering
2020.11.10 A new approach is proposed to improve the strength of the vanadium titanium magnetite (VTM) sinter by adding preformed calcium ferrite (CF) to partially substitute the CaO. The effects of the sintering temperature, oxygen partial pressure (pO2), heating time, and substitution ratio of preformed CF on the mineralogy of the VTM sinter are examined through
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Influence of magnetite concentrate morphology on
2023.9.1 Sintering in the magnetite and hematite phases begins at 950 and 1100 °C, respectively. If the oxidation of the magnetite pellet is not completed before reaching 950 °C, a duplex structure, including an oxidized outer shell and a non-oxidized core, forms. At temperatures above 950 °C, the magnetite core shrinks more than the hematite shell.
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Mechanisms in oxidation and sintering of magnetite iron ore
2008.4.9 The logical explanation is rather the increased sintering in the magnetite core taking place before oxidation and then suppressing the diffusion rate of oxygen. At 1200 °C, the hematite shell and the magnetite core both show vigorous sintering and the sintering rate in both phases increased as the magnetite concentrate became finer (Fig. 5 b ...
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Estimation of Sintering Kinetics of Magnetite Pellet
2023.5.16 Sintering of magnetite which hampers the oxidation of magnetite is aimed to be kept as low as possible. In succession to our earlier study on sintering behavior of oxidized magnetite (hematite), this paper focusses on the sintering behavior of magnetite phase in isolation with an objective to estimate their kinetic parameters. The pellets ...
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SINTERING MECHANISM OF MAGNETITE PELLETS
2016.10.3 sintering of magnetite starts at lower temperatures than hematite sintering, the non-oxidized or ... magnification and long working distance optical systems. It measures the dimensionalvariations solely on their optical images without having any contact with the sample, and therefore does not ...
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Estimation of Sintering Kinetics of Oxidized Magnetite Pellet
2014.12.24 The quality of magnetite pellet is primarily determined by the physico-chemical changes the pellet undergoes as it makes excursion through the gaseous and thermal environment in the induration furnace. Among these physico-chemical processes, the oxidation of magnetite phase and the sintering of oxidized magnetite (hematite) and magnetite (non
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Influence of Basicity on High-Chromium Vanadium-Titanium Magnetite ...
2015.3.11 The effect of basicity on high-chromium vanadium-titanium magnetite (V-Ti-Cr) sintering was studied via sintering pot tests. The sinter rate, yield, and productivity were calculated before determining sinter strength (TI) and reduction degradation index (RDI). Furthermore, the effect of basicity on V-Ti-Cr sinter mineralogy was clarified using metallographic microscopy, x
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(PDF) Investigation of Sintering Kinetics of Magnetite pellets
2015.10.20 The values of activation energy and time exponent derived suggests that sintering of oxidized magnetite (hematite) is dominated by a single diffusion mechanism, whereas sintering of magnetite ...
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Interface interaction between SiO2 and magnetite under
2023.9.7 At 1573 K, the liquid phase promotes the recrystallization growth of hematite at high temperature. Molecular dynamic study shows that it is difficult for quartz SiO2 to form sintering neck with Fe2O3. When the calcination temperature is higher than 1400 K, the Fe2O3–Fe2SiO4 system produces a considerable sintering neck structure after relaxation.
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SINTERING MECHANISM OF MAGNETITE PELLETS DURING
2016.6.1 The values of activation energy and time exponent derived suggests that sintering of oxidized magnetite (hematite) is a single dominant diffusion mechanism, whereas sintering of unoxidized ...
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Changes of Mineral Phases during the Sintering of Fe2O3-CaO-SiO2 System
Semantic Scholar extracted view of "Changes of Mineral Phases during the Sintering of Fe2O3-CaO-SiO2 System" by Fumio Matsuno. ... A new approach is proposed to improve the strength of the vanadium titanium magnetite (VTM) sinter by adding preformed calcium ferrite (CF) to partially substitute the CaO.
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SINTERING MECHANISM OF MAGNETITE
2016.6.1 The values of activation energy and time exponent derived suggests that sintering of oxidized magnetite (hematite) is a single dominant diffusion mechanism, whereas sintering of unoxidized ...
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Sintering: Most Efficient Technologies for Greenhouse
2019.7.19 So, the sintering process main objectives are to increase the size of ore additives to a level acceptable to the blast furnace for improving permeability of burden inside the BF; to form a strong agglomerate with high bulk reducibility; to remove volatile matter like CO 2 from carbonates, H 2 O from hydroxides, and sulfur from sulfide type of ore fines along with
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(PDF) Investigation of Sintering Kinetics of Magnetite pellets
2015.10.20 The values of activation energy and time exponent derived suggests that sintering of oxidized magnetite (hematite) is dominated by a single diffusion mechanism, whereas sintering of magnetite ...
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Replacement of magnetite by hematite in hydrothermal systems
2022.1.1 The replacement of magnetite by hematite is commonly observed in various geologic systems, especially in banded iron formations (BIF), iron oxide copper-gold deposits, and iron skarn deposits (Angerer et al., 2012; Franchini et al., 2000; Ehrig et al., 2021).The transformation of magnetite to hematite was attributed to an oxidizing reaction, generally
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Experimental Study on Oxygen-Enriched Sintering - ProQuest
2.2. Experimental Methods and Devices. The effects of different oxygen enrichment conditions on the sintering performance of vanadium-titanium magnetite are investigated by changing the factors, such as oxygen enrichment time, oxygen enrichment load,
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(PDF) Evolution of mineral phases during iron ore sintering
2022.11.23 Sintering reactions of magnetite concentrates were studied under various atmospheres using a bench-scale infrared hearing furnace. The results show that the ability of magnetite to participate in ...
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Mechanism of magnetite iron ore concentrate morphology
2022.12.1 The effect of morphology on the sintering behavior of particles has been investigated in the literature [25], [26]. Formoso et al. [27] investigated oxidation and sintering mechanisms in magnetite ore green pellets according to the fineness of raw material. They showed that at a constant porosity in green pellets, the oxidation time becomes ...
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Experimental and molecular dynamics multiscale study on sintering
2024.9.1 Semantic Scholar extracted view of "Experimental and molecular dynamics multiscale study on sintering and interfacial reaction of Fe2O3/CaO particle system" by Rubin Zeng et al. ... Particle migration behavior between TiO2 and magnetite under high-temperature oxidative roasting: An experimental and molecular dynamics study ...
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Recent advances in sintering with high proportions of magnetite ...
2017.12.27 Magnetite concentrate is typically high in Fe grade and releases extra heat when oxidized to hematite. This will not only improve the sinter quality but also have a potential beneficial impact on the fuel consumption of the sintering process. However, most concentrates are very fine and less reactive, which will negatively impact the green bed ...
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