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Superparamagnetic nanoparticles are of high interest for therapeutic applications. In this work, nanoparticles of calcium-doped manganese ferrites (CaxMn1−xFe2O4) functionalized with citrate were synthesized through thermally assisted oxidative precipitation in aqueous media. The method provided well dispersed aqueous suspensions of nanoparticles through a one-pot
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1.Introduction. Gray cast iron has good strength, wear resistance, vibration damping, excellent casting performance, and low manufacturing costs []; as a result, it is currently the most commonly used material for cast iron parts.The world output of gray cast iron parts reached 49.53 million tons in 2019, accounting for approximately 46.9% of the world output of castings.
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6 Ductile iron. Malleable iron. Wrought iron. High-strength low-alloy steel ( HSLA) is a type of alloy steel that provides better mechanical properties or greater resistance to corrosion than carbon steel. HSLA steels vary from other steels in that they are not made to meet a specific chemical composition but rather specific mechanical properties.
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14.11.2022The mixtures produce large amounts of calcium ferrite liquid phase during the high-temperature process that reacts with Al 2 O 3 of the crucible. Therefore, it is necessary to crush the crucible after cooling to room temperature to remove the sintered product. Download : Download high-res image (707KB) Download : Download full-size image Fig. 3.
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it is partially melted at a temperature of between 1250-1350 C and undergoes a series of reactions that give rise to the formation of sinter; a material of a suitable composition and strength to
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Iron forms compounds in a wide range of oxidation states, −2 to +7. Iron also forms many coordination compounds; some of them, such as ferrocene, ferrioxalate, and Prussian blue, have substantial industrial, medical, or research applications. Contents 1 Characteristics 1.1 Allotropes 1.2 Melting and boiling points 1.3 Magnetic properties
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12.11.2022After drying, CMC can be adsorbed on the surface through the formation of chemical bonds between oxygen (-OH, -CH 2 COOH, or -CH 2 OCH 2 - backbone) present in the CMC molecules and Fe 3+ /Fe 2+ on the iron ore surface [ 70 ].
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Sinter ore is one of the main materials of blast furnaces in China, and the productivity of the blast furnace and the economic and technical indicators of the ironmaking process are directly influenced by sinter yield and quality. Therefore, the ore-blending process should be optimized based on the high-temperature characteristics of iron ore to improve the sinter yield and
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The effects of basicity and Mg addition on the crystallisation during cooling of complex Ca-rich ferrite iron ore sinter bonding phases SFCA and Fe-rich SFCA was investigated using in situ synchrotron X-ray diffraction. In synthetic iron ore sinter mixtures, cooling of a high temperature (T = 1623 K) assemblage comprising magnetite and melt showed that decreasing basicity
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08.11.2022Download Citation | Effects of basicity and Al2O3 content on the crystal structure of silico-ferrite of calcium and aluminum | Silico-ferrite of calcium and aluminum (SFCA) is the primary bonding
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formation rate of calcium ferrite melt were investigated. By the way, iron ores that is constituent element of pseu- do particles have wide particle distribution from several 10mm to several mm. Therefore, it is considered that the particle size of iron ore also affects on the melt formation rate of calcium ferrite. Moreover, it is considered that the amount of melt in sintering process is
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Download scientific diagram | Size distribution of iron ores/mass%. from publication: Effect of characteristics of coarse iron ores on the granulation behaviour of concentrates in the sintering
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Calcium ferrite produced from the reaction of hematite and the flux in heating stage is a form of calcium diferrite (CaO2Fe 2 O 3) with some substitution of Si and Al. The composition of calcium ferrite generated from magnetite depends on the amounts of SiO 2 and CaO from silicate melt reacting with magnetite.
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14-11-2022As the main solid by-product of municipal waste incineration, the safe treatment and resource utilization of municipal waste incineration fly ash (hereafter referred to as fly ash), comprising a large amount of CaO, SiO 2, Al 2 O 3, and related compounds, has become an exceedingly important environmental concern.Owing to its alkaline composition, herein we
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as such, the use of emr to prepare byf clinkers has several significant advantages [106], [107], [113]: 1) the introduction of excess fe 2 o 3 to partially replace al 2 o 3 in c 4 a 3 $ to form c 4 a 3-x f x $ minerals using emr while adding the proportion of ferrite in the clinker, which reduces the demand of aluminum materials and allows the
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18-05-2022Download Citation | Study of SFCA and SFCA-I Phase in the Ternary Phase System of Iron Ore Pellets | To get an effective makeover of available low-grade iron ore, the selection of additive with
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13.06.2019The formation rate of calcium ferrite was determined by in-situ X-ray diffraction (XRD) and by the K-value method. The X-ray diffraction analysis was performed using Pt as the internal standard for application of the K-value method. The formation of Ca 2 Fe 2 O 5 (C 2 F) occurred much earlier than the formation of CaFeO 4 (CF).
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14.11.2022The mixtures produce large amounts of calcium ferrite liquid phase during the high-temperature process that reacts with Al 2 O 3 of the crucible. Therefore, it is necessary to crush the crucible after cooling to room temperature to remove the sintered product. Download : Download high-res image (707KB) Download : Download full-size
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calcium ferrite formation of magnetite is the most pronounced, while O2 content of inlet gas has little effect on the calcium ferrite formation of limonite. Key words: iron ore; sintering; calcium ferrite; mineralization 1 Introduction The mineralization properties of iron ores play a significant role in the mineral composition and
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10-11-2022The formation of olivine crystals was attributed to ion exchange from the iron cation to the magnesium cation (5 wt% Mg) in the crystal structure of the fayalite. Furthermore, the presence of magnetite (70 wt% Fe) was due to the incorporation of new iron oxide into the system, which changed the equilibrium.
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on the other hand, the manufacturing methods of calcium ferrite (a compound of cao and fe 2 o 3 —known as a bonding phase in the sintering process of iron ores) to use as substitute of fluorite in converter are investigated due to its high ability of de-phosphorous during blowing. 4, 5, 6, 7) furthermore, calcium ferrite is expected as
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Score: 4.3/5 (28 votes) . Fayalite can form at temperatures below ~350 C, but only in a narrow range of water/rock ratios that designates a transition between aqueous and metamorphic conditions. Pure fayalite forms at lower temperatures, higher water/rock ratios, and elevated pressures that correspond to higher H2/H2O ratios.
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Reduction Behavior of Calcium Ferrite in the Iron Ore Sinter under High Hydrogen Atmosphere and its Effect on the Disintegration Peer-reviewed Taichi Murakami, Takeyuki Kodaira, Eiki Kasai Proceedings of Asia Steel International Conference 2015 284-285 2015/10
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In its elemental form, calcium has a dull gray-silver appearance. Calcium is a reactive, soft metal that is a member of the alkaline earth elements. It frequently serves as an alloying agent for other metals like aluminum and beryllium calcium carbonate. It is also an biologically essential substance found in teeth, bones, and shells.
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01.11.2022Following a combined approach using thermodynamic calculations and experimental verification, we found that CaO from fly ash can combine with Fe2O3 to form complex calcium ferrite, which can
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10.11.2022The formation of olivine crystals was attributed to ion exchange from the iron cation to the magnesium cation (5 wt% Mg) in the crystal structure of the fayalite. Furthermore, the presence of magnetite (70 wt% Fe) was due to the incorporation of new iron oxide into the system, which changed the equilibrium.
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ability of calcium ferrite containing SiO2 and Al2O3 - SFCA (SiO2–Fe2O3–CaO–Al2O3). These four indexes can give a comprehensive estimation of the behavior of iron ore during sintering. However, these indexes can only be measured in a special equipments and the value of the index is a relative data. Up to now, the most effective method on
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18.05.2022Download Citation | Study of SFCA and SFCA-I Phase in the Ternary Phase System of Iron Ore Pellets | To get an effective makeover of available low-grade iron ore, the selection of additive with
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22.08.2017The thermal decomposition of mill scale, and the effect of mill scale addition on the formation and decomposition of Silico-Ferrite of Calcium and Aluminium (SFCA) and SFCA-I iron ore sinter bonding phases, has been investigated using in situ X-ray diffraction.
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Effects of basicity and Al 2 O 3 content on the crystal structure of silico-ferrite of calcium and aluminum ISIJ International Advance Publication ; Characterization and Control of Secondary Phase Precipitation of Nb–V–Ti Microalloyed Steel during Continuous Casting Process ISIJ International Vol.62(2022), No.11
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14-11-2022The mixtures produce large amounts of calcium ferrite liquid phase during the high-temperature process that reacts with Al 2 O 3 of the crucible. Therefore, it is necessary to crush the crucible after cooling to room temperature to remove the sintered product. Download : Download high-res image (707KB) Download : Download full-size image Fig. 3.
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Characteristic of Mineralization of Specularite Iron Ores during Composite Agglomeration Processing. Heats of Reaction in the Formation of TiB 2 Reinforced Titanium Aluminide Composites. Crystallization Behavior of Calcium Ferrite during Iron Ore Sintering. 47. Enrichment Behavior of Phosphorus in CaO-SiO 2-FeO x-P 2 O 5 Based Slag.
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iron ore on the fluidity of liquid phase in the sintering pro- cess, fluidity characteristic tests were carried out by the flu- idity of liquid phase test method. 2)12 kinds of iron ores and CaO pure reagent were used. Sinter was composed by a part of melt such as calcium ferrite formed at the high tempera-
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14.11.2022(1) The main effective component of fly ash is calcium oxide, which acts as a basic flux in the sintering process, and reacts with iron oxides and silicon-alumina oxides in iron ore to form the main binder phase of sintered ore. calcium ferrite. (2)
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Matters Formed During Iron Ore Sintering: 10:10-10:30 Keynote Lecture 2 Kazuhiro Nagata (Tokyo Institute of Technology) Powder ironmaking by Tatara: 10:10-10:30 Equilibria Studies of Silico-Ferrite of Calcium and Aluminium Iron Ore Sinter Bonding Phases S5-2 Sandeep Kumar (LKAB) Pellet Particle Kinetic Model for Induration of Magnetite
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08-11-2022Download Citation | Effects of basicity and Al2O3 content on the crystal structure of silico-ferrite of calcium and aluminum | Silico-ferrite of calcium and aluminum (SFCA) is the primary bonding
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