magnetite sintering systems

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,
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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
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Interface interaction between SiO2 and magnetite under
2023.9.7 When the calcination temperature is higher than 1400 K, the Fe2O3–Fe2SiO4 system produces a considerable sintering neck structure after
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Review on the Oxidation Behaviors and Kinetics of
2021.4.21 Tools Share Abstract One possible route for ironmaking process is using a hydrogen-gas-based fluidized bed to produce direct
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Magnetite Carbon-Free Sintering Process Based on
2020.1.24 The definition of the sintering process can be summarized as follows: it refers to the various powdery iron-containing raw materials, which are matched with a
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(PDF) Effects of sintering conditions on porosity, strength,
2022.8.22 The aims of this work are: • To create simple sinter system analogues using combinations of hematite and magnetite fines, lime and silica, and to fire them at
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Effect of Magnetite on Mineral Phase Formation in
magnetite in used as raw material in sintering process. Therefore, in this research, the effects of magnetite on min- eral phase formation behavior was investigated.
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Efficient double-layer sintering of titanomagnetite concentrate
2022.4.15 The traditional titanomagnetite sintering process consumes high fuel and produces weak-strength sinter. In this study, double-layer sintering was used to solve
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Sintering Fundamentals of Magnetite Alone and Blended
Sintering performance of several Chinese ore blends was also presented to provide greater understanding of the behaviour of imported hematite and hematite/goethite ores.
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A promising method to recover spent V2O5–WO3/TiO2
2021.12.2 2.2 Methods 2.2.1 Sinter pot experiments. Sinter pot experiments were used to simulate the actual sintering process in integrated steelworks [].Figure 4 shows the schematic of the sinter pot test system, including granulating system, gas permeability testing system, ignition hood, sinter pot, wind box, draft fan, etc. Before the sinter pot
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Sintering Fundamentals of Magnetite Alone and Blended
3.3. Magnetite Oxidation during Sintering Magnetite oxidation may be expressed by DH 298 ° 27400cal Obviously, the oxidation of magnetite is an exothermic re-action. The heat generated is roughly equivalent to that of 0.29mol carbon being combusted to CO 2 (C O 2 CO 2, DH°298 94490cal) when complete oxidation is achieved.
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Zhengjian LIU Professor University of Science
Adopting conventional sintering process of vanadium-titanium magnetite concentrates has such problems as low tumbler index and RDI due to the high-TiO2 content, coarse granularity and poor ...
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Interface interaction between SiO2 and magnetite under
2023.9.7 As the sintering process progresses, the size of the sintering neck is practically unchanged, and the effective sintering neck at the nanoscale grows over an area of less than 1 nm 2. This indicates that quartz SiO 2 has difficulty in producing a sintering neck structure with Fe 2 O 3 in the Fe 2 O 3 –SiO 2 system.
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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 produced during the sintering process declined as the TiO 2 content in sintering materials increased, whereas hematite, perovskite, and sinter silicate increased to variable degrees.
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Metals Free Full-Text Effect of Basicity on Sintering
2020.4.27 Basicity has an important effect on the behavior of high-chromium vanadium-titanium magnetite (HCVTM) sinter. The effect of basicity on sintering, reduction, and softening-melting properties was investigated in an experiment-scale sinter pot. The results showed that with the basicity increasing from 1.7 to 2.5, the vertical sinter speed,
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Integrated Utilization of Vanadium-Titanium Magnetite
2022.3.4 Lightweight foamed ceramics were prepared using 55 wt.% vanadium-titanium magnetite tailings (VTMT) followed by sintering at 1130 °C. In the CaO-MgO-SiO2-Al2O3 foamed ceramic quaternary system, the CaO and SiO2 components play an important role in adjusting material properties and controlling phase transition. In this
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Experimental Study on Oxygen-Enriched Sintering of
2018.5.21 The influences of various factors, such as oxygen enrichment time, oxygen enrichment load, and ignition temperature, on the technical indices and sintering performance in the vanadium-titanium magnetite sintering process are simulated using sinter pot experiments. The experiments are based on the field production parameters of a
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Effect of MgO on Highly Basic Sinters with High Al2O3
2021.7.4 Al 2 O 3 and MgO are high melting point materials. The increase of them can lead to a rise in sintering liquid form temperature. When carbon content is kept constant for all the experiments, with the increase of MgO mass fraction, the bonding phase in the sintering process and liquid phase flowability will be reduced.
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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
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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
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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
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Mineralogical properties and co-sintering characteristics of
2023.7.25 To investigate the feasibility of co-sintering of fluxed iron ore with magnetite concentrates, the mineralogical properties of a novel fluxed iron ore were studied using particle size analysis, microscopic morphology characterization, and X-ray diffraction Rietveld analysis. Following that, the experiments for granulation performance and basic
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Reaction Routes of CaO–Fe2O3–TiO2 and Calcium Ferrite–TiO2 System
2018.1.19 Perovskite easily forms during sintering of vanadium titanium magnetite (VTM) and is unfavorable for the following blast furnace. Steelmaking can concomitantly produce a great quantity of oxidized scale composed mainly of FeO and Fe 3 O 4.Calcium ferrite (CaOFe 2 O 3, CF) can be formed by oxidized scale with lime in air atmosphere
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Thermodynamic Modelling of Iron Ore Sintering Reactions
2019.6.13 The substitution trend for the SFCA solid solution in the Fe 2 O 3-CaO-Al 2 O 3-SiO 2 system was subsequently proposed and confirmed to follow the plane defined by the end members: 4CaO3SiO 2-CaO3Fe 2 O 3-CaO3Al 2 O 3 (C4S3-CF3-CA3) ... Particularly for the magnetite ore sintering, oxidizing of the magnetite to hematite at high
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高钙赤铁矿烧结的矿物特性、冶金性能及相结构演变 - USTB
2017.5.29 The Ca-rich iron ore sintering can improve the calorific value of sintering flue gas compared with magnetite sintering, which is conducive to recovering heat for secondary use. As the content of the Ca-rich iron ore increases, sinter agglomeration shifts from localized liquid-phase bonding to a combination of localized liquid-phase bonding
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Particle migration behavior between TiO2 and magnetite
2023.2.15 The effect of sintering additives on the sintering of SiC nanoparticles is studied by MD simulation. A new potential function is developed based on the lattice size theory. The Al-Si-C element system, Ti-Si-C element system, and V-Si-C element system are simulated and compared.
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Exploring the capabilities of high-pressure spark plasma sintering ...
2023.9.1 The pressure that can be applied during SPS is limited by the strength of the graphite tooling/molds. Anselmi-Tamburini, Garay, and Munir [18] published in 2005 the first detailed report on modifying an SPS apparatus to apply high pressure and coined the term “high-pressure spark plasma sintering” (HPSPS). HPSPS can essentially be classified as
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Mechanism of magnetite iron ore concentrate morphology
2022.12.1 During the induration process of magnetite iron ore pellets, the magnetite phase converts to hematite, as shown in Eq. (1) [12], [13]. FeO.Fe 2 O 3 + O 2 = 6 Fe 2 O 3 ΔH = -490 kJ/mol(1) This exothermic oxidation reaction provides a significant portion of the required total energy for sintering.
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Variation in Iron Ore Sinter Mineralogy with Changes in
2022.9.30 These general trends were also noted in the thermodynamic modelling of the FeO-Fe 2 O 3-CaO-Al 2 O 3-SiO 2 system by ... conditions, e.g., ‘low temperature’ sintering of haematitic blends with abundant SFCA versus ‘high temperature’ magnetite sintering with a high proportion of glass, depending on magnetite–magnetite grain
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Effect of oxygen enrichment on sintering behavior of high
2023.5.15 To achieve high-efficiency utilization of complex and unmanageable iron-containing minerals, the effects of oxygen enrichment on productivity, yield, flame front speed, exhaust gas peak temperature, and desulphurization reaction of the vanadium–titanium magnetite sintering process as well as sinter tumble index and
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Characteristics and Sintering Mechanisms of Iron
2023.4.27 The magnetite crystal is an equiaxed crystal system, whereas the hematite is a hexagonal system. Hence, changes in the lattice structure occur during the sintering process, and these enhance the
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A quantitative investigation on consolidation of titanium
2022.5.28 The measurement method and quantitative indexes of iron ore consolidation characteristic temperature (CCT) during roasting, including consolidation starting temperature, highest consolidation rate temperature, and consolidation termination temperature, were improved based on previous research. The mineral properties of V–Ti
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Measurement of Process Conditions Present in Pilot Scale Iron Ore Sintering
2019.6.22 To simulate industrial sintering, and to ensure that magnetite is present at the peak temperature, samples with a bulk composition of 88.0 wt % Fe 2 O 3 and a CaO/SiO 2 ratio of 3.46 wt/wt were cooled from 1400 °C to 800 °C in air at 2 K/s. The resulting microstructure was found to contain both hematite and magnetite, three
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Metals Free Full-Text Effect of Silica Content on Iron Ore Sintering
2023.5.23 During the iron ore sintering process, its SiO2 content considerably affects the sinter quality. ... magnetite, calcium ferrite, magnesium ferrite, and calcium silicate. In order to further study the mineral ... Tsukihashi, F. Effect of oxygen partial pressure on liquidus for the CaO-SiO 2-FeO x system at 1573 K. ISIJ Int. 2004, 44, 2040–2045 ...
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Comprehensive evaluation of high-temperature sintering
2022.12.5 Sea sand vanadia-titania magnetite is difficult to pelletize, and it is difficult for iron and steel enterprises to use it as a raw material for ironmaking. In this paper, the high-temperature physicochemical characteristics and sintering behavior of sea sand vanadia-titania magnetite were comprehensively studied and systematically evaluated.
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Metals Free Full-Text Investigations into NOx Formation
2022.7.15 Fe 3 O 4 and CO in the system could react with NO x to produce Fe 2 O 3, N 2 and CO 2, ... the addition of magnetite and siderite can be conducive to the reduction of nitrogen oxide emissions in iron ore sintering flue gas. Magnetite can also release heat in the sintering process, reduce the sintering carbon content, reduce sintering solid fuel ...
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Experimental and molecular dynamics examination of the
2022.3.1 Synthetic magnetite has a greater specific surface area and surface flaws than natural magnetite, which results in a difference in oxidation reactivity between the two. ... At the initial stage of sintering, the formation area of the Fe 2 O 3-Mg 2 SiO 4 system is 3.9 nm 2. When the sintering temperature is higher than 1340 K, the size of the ...
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Minerals Free Full-Text Investigations of MgO on Sintering
2019.5.27 High-chromium vanadium-titanium magnetite (HCVTM) in the Hongge region has been used as an essential mineral resource in ironmaking. The effects of MgO on sintering performance and metallurgical properties were investigated by sintering pot tests, X-ray diffraction (XRD), and scanning electron microscopy-energy dispersive
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Vacuum sintering behavior and magnetic transformation for
2020.9.1 On the other hand, the study on high temperature sintering of ferromagnetic minerals has an important reference value for utilization of high temperature sintered the mineral systems that rich in magnetite and ilmenite, such as Martian regolith which is rich in ferromagnetic minerals: magnetite and titanium inter-metallics such as ...
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