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Sinter quality begins with the mined iron ore and the proper selection and mixing of the raw materials. Inhomogeneous raw mix can affect permeability and cause an increase in fuel consumption. During the iron ore sintering process in iron and steel manufacturing, an online analyzer can be used to determine the elemental composition of …
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Interests: new technology for sintering pellets; new technology for low-carbon iron making; metallurgical resources value-added processing. Prof. Dr. Chunying Zhang E-Mail Website Guest Editor. School of Science, North China University of Science and Technology, Tangshan 063000, China
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Sintering. Abstract. The present work aims at performing prediction validation for the physical properties of coke layered and nonlayered hybrid pelletized sinter (HPS) using artificial neural networks …
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Sintering and pellet flue gas has the characteristics of large flow rate and low NO x concentration, and the key problem is how to develop low-cost denitrification …
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Green U 3 Si 2 pellets loaded into the graphite sintering crucible, before sealing in an inert atmosphere glovebox. Download : Download high-res image (135KB) Download : Download full-size image; Fig. 3. Sintering profile for U 3 Si 2 fuel pellets. Plot shows the program set point and thermal profile as measured by a Type S thermocouple.
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In this study, the possibility of sintering industrial pressed uranium dioxide pellets using microwave radiation for the production of nuclear fuel is shown. As a result, the conditions for sintering pellets in an experimental microwave oven (power 2.9 kW, frequency 2.45 GHz) were chosen to ensure that the characteristics of the resulting fuel …
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The sintering process is an alternative to using the fine concentrate through the hybrid-pellet sintering process to maintain bed permeability by reducing the overall energy consumption of making iron …
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On sintering the pellet in hydrogen, ... Nishida, T. and Yuda, R. (1998) Effect of Particle Size and Oxygen Potential on UO2-Gd2O3 Pellet Sintering, Advances in Fuel Pellet Technology for Improved Performance at High Burnup. Proceedings of Technical Committee Meeting, IAEA TECH DOC, 1036, 73-84.
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It has been shown that sintering onset is characterized by the temperature interval 1100–1200°C for dry-technology pellets and 900–1000°C for wet-technology pellets.
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Traditionally, fine ores are treated either by the process of sintering and/or by pelletizing to prepare an agglomerate with suitable metallurgical characteristics for ironmaking processes. The ...
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Influence of sintering temperature on the density and phase of pellets Hot pressing sintering temperature Pellets relative density Pellets phase 1660 °C 89.77%T.D Pure β-phase 1690 °C 92.14%T.D No obvious α-phase diffraction peaks 1710 °C 95.31%T.D obvious α-phase diffraction peaks 1760 °C 96.58%T.D obvious α-phase diffraction peaks
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To obtain a dense pellet with maintained shape, the reacted pellets were regrained to powder and then pressed into pellets for a second round of UHS sintering. Alternatively, the pressed green pellets can react at ≈800–1000 °C for about 1 min to slowly finish the reactions, then go through UHS sintering at high temperature in one step.
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The NO x emissions were found to decrease with increasing levels of CF pellets charged into the sinter bed and with the substitution of fine limestone powder for …
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Agglomeration processes are typically of three types: pelletizing, briquetting, and sintering. Sintering is a manufacturing technology to make a wide variety of engineering materials, ceramic and metallurgical components by compacting the …
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Figure 4 3D Printers Productive and Cost-Effective Digital Manufacturing Solutions. Figure 4 ® delivers ultra-fast additive manufacturing technology with systems that offer the expandable capacity to meet your present and future needs. With access to a range of innovative materials, Figure 4 enables tool-less alternatives to traditional injection …
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The final density of the ceramics (after sintering) is strongly affected by green density. At first, we should prepare the green pellets with optimized binder percentage, pressure, dwell time etc ...
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The prepared UO 2 powder is pressed into green pellets in reciprocal or rotary presses at 150–500 MPa. The density of green pellets reaches 50–60% TD. Pellets are normally fabricated with dished ends and/or chamfered edges. The dishes compensate for radial variation in thermal expansion in-reactor, and the chamfers reduce the …
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In this paper, by carrying out research on the dressing process of TRISO particles, it is realized that SiC powder com- pletelyencapsulatesTRISOparticles.Thehot …
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Then as the temperature increases, sintering within and among the pellets occurs [Citation 18, Citation 21, Citation 22]. These make it difficult for the reducing gas to flow in the interior of the bed and cause the melting of FeO-rich regions inside the pellets. Consequently, the pellets start to soften under the load (stage 2) [Citation 23].
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A number of methods have been proposed to reduce sintering temperature, or more precisely the energy for densification, these include the addition of sintering aids, the …
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This technology is suitable for the field of steel smelting and has little impact on the sintering system. ... (Phase I) sintering pellet system sintering waste heat and energy comprehensive ...
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In this work, commercial-size uranium dioxide (UO 2) fuel pellets with a theoretical density of 95% were consolidated by spark plasma sintering (SPS) at 1600°C for 5 min. Systematic investigations suggest …
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After sintering at 650°C, AlPO 4 formation was confirmed by a shoulder peak at 2θ = 21.77°. This AlPO 4 formation was observed in all the samples. With increases in the sintering temperature, further impurities were formed. After sintering at 700°C, a peak of Li 4 Ge 5 O 12 was confirmed. This peak was also observed in samples sintered at ...
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This article introduces the new technology of sintering pellet quality improvement and consumption reduction from the aspects of new ironmaking …
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Thermal volume changes and oxidation mechanisms in magnetite iron ore green pellets balled with 0.5% bentonite binder, as a function of raw material fineness and pellet porosity, are shown. When a pellet starts to oxidize, a shell of hematite is formed around the pellet while the core still is magnetite. Dilatation curves were measured under ...
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A solid-phase metallurgy combined with spark plasma sintering technology was used to prepare U3Si2 pellets. The thermal conductivity and oxidation behavior of the pellets were studied. The pellets were highly dense (> 98% theoretical density) and had an ultra-high phase purity. The thermal conductivity of the U3Si2 pellets increased linearly …
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Researchers have devoted substantial effort to developing innovative sintering technologies, such as microwave-assisted sintering and spark plasma sintering (SPS). ... sandwiched' a pressed green …
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Intensification of the iron ore sintering process is approached with a four-way framework covering granulation improvement, waste gas recycling, fuel gas injection into the sinter bed, and reduction of stack emissions. Various metallurgical wastes are granulated to form micro pellets and are dosed along with the feed to cut down the cost.
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This article introduces the new technology of sintering pellet quality improvement and consumption reduction from the aspects of new ironmaking technology and basic theoretical research, analysis of coke behavior in the blast furnace, blast furnace clean fuel injection technology, blast furnace longevity technology, blast furnace …
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The rapid sintering technology is being commercialized through HighT-Tech LLC, a UMD spinoff company with a focus on a range of high temperature technologies. "This new method solves the key ...
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