DOI: 10.2355/TETSUTOHAGANE1955.87.9_585 Corpus ID: 137877776 Reduction, Carburization and Melting Behavior of Iron Ore Pellets containing Coal Char or Graphite on Heating LBNL-XXXX E RNEST O RLANDO L AWRENCE B ERKELEY N ATIONAL L
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· Abstract and Figures. Carbon-containing pellets were prepared with the carbonized product of agricultural wastes and iron concentrate, and an experimental study on the direct reduction was carried
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· The yield of the direct H2-driven reduction was examined and found to exceed 90%, with a maximum of 98% under the vibration of ~47 Hz with an amplitude of 0.6 mm, and operating temperatures close
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· Characterization and beneficiation of dry iron ore processing plant reject fines to produce sinter/pellet grade iron ore concentrate.min Metall. Explor. , 36 ( 2 ) ( 2019 ) , pp. 451-462 v.10.1007/s42461-018-0006-x
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· It has strong adaptability and can not only produce sintered ore with coarse-grained rich ore powder and concentrate, but also process industrial iron-containing wastes. Due to the dominance of
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· The combustion-supporting effect of steam to coke breeze in sintering has the potential to improve sinter quality and reduce pollutants emissions. The results show that increasing the by-product steam injection concentration (0.32–0.47vol%) and prolonging the injection time (5 min) within a proper range (10–15 min) can improve sinter quality.
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· Over 90% reduction of the iron ore can be achieved in about 10 minutes at temperatures about 1,000 C with 20% excess stoichiometric carbon in the mix. The reduction of iron ore with coal by microwave heating produces a pure, dust-free, and high Btu flue gas that can be used in related thermal operations. Depending upon the purity,
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The proposed process is based on flash reduction of iron ore concentrate with a gaseous reagent, such as hydrogen, syngas and/or natural gas. This series of papers reports on the results of process simulation for the proposed process operated with natural gas.
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· The formation of geopolymers from mine tailings using cold-bonding processes is known to be possible. Numerous cold-bonding methods exist, but the hydrothermal processes involving high temperatures and pressures in the presence of steam have been found to be the most ideal. This paper presents the results of
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· The inject devices are shown in Fig. 2, a injecting hood is set at the top of sinter pot for injecting natural gas and steam after ignition.Natural gas concentrate is controlled by a flowmeter (after measurement, the inlet flow is around 100 m 3 /h), and steam is generated by steam generator, the concentrate is controlled by extracting
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· Drying and roasting behavior of iron ore pellets with microwave and conventional heating have been comparably investigated. The results showed that the dehydration time of green pellets can be shortened by approximately two-thirds with microwave heating. Meanwhile, the average compressive strength of pellets with organic
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· PDF Journal of Chemical Technology and Metallurgy, 5, 5, 2021 1090 proposed methods of leaching by strong mineral acids are not suitable both from an economic and an ecologi-cal point of view [8]. The magnesian iron ore concentrate that is produced currently at the
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Solving Ore Concentrate Reduction with New Chemistry-$2,924,514 Tufts University is developing a method to directly reduce iron ore concentrates with ammonia, eliminating all direct process emissions from the ironmaking step, as well as emissions that
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· Gas-Based Direct Reduction Ironmaking. A gas is used as reductant to reduce iron oxides into iron metal in certain temperature. The reducing gas is produced by using natural gas or petroleum as energy source and oxidizing gas (CO 2 or H 2 O) or oxygen as oxidant. Hydrocarbon is decomposed and converted through catalytic
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:Steam InjectionFuel Combustion EfficiencyIron Ore Sintering ProcessHeat Efficiency Improvement of Iron Ore Sintering Bed by Spraying Steam . TSUNG-YEN HUANG and JIA-SHYAN SHIAU . Iron and Steel Research & Development
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:Publish Year:2020Improving the combustion efficiency of fuels is essential to reducing pollutant emissions in the iron ore sintering process. The sintering bed surface steam-injection technology has
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· Figure 1: Steelmaking byproducts for blast furnace (BF), basic oxygen furnace (BOF) and electric arc furnace (EAF) processes. Source: World Steel Association (worldsteel) The first step in the production of steel or cast iron alloys is the reduction of iron ore—which contains iron oxide and gangue or mineral impurities—to unrefined, reduced
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excessive oxidation during pre-heating. Steam Reformer Air Steam Natural Gas CO 2 Removal Feed System Concentrate 67.5% Iron Ore Fines 62.5% Fet 5% SiO 2 2.4% Al 2O 3 Bene Plant CO 2 Reforming
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· In this study, this issue has been addressed by taking variable preheating temperature (850 °C, 950 °C, 1000 °C, 1100 °C) and residence time (20, 25, 30, 35 min.). Pellets were prepared from three iron ores with LOI (2.64, 4.85, and 9.19%). Effect of ore mineralogy on the drying characteristics of the pellet has been established.
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· It was found that the combustion of sunflower husks generates enough heat (19.31 MJ kg−1) to obtain iron ore pellets with good the pelletization of hematite iron ore concentrate (Fe(T) of 63
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· Siderite, a carbonate iron ore, was verified as promising candidate, as it shows significantly lower reaction temperatures and twice the storage capacity over other commercial iron ores such as ilmenite. The specific storage costs are as low as 80–150 $ per MWh hydrogen stored, based on the experimental in-situ tests.
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The purpose of heating the iron ore concentrate slurry prior to pelletising was to increase the filtration rate and cake moisture, enabling the pelletising plant to increase
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:Sandra Lúcia de Moraes, José Renato Baptista de Lima, Tiago Ramos Ribeiro · The results show that increasing the by-product steam injection concentration (0.32-0.47vol%) and prolonging the injection time (5min) within a proper
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Introduction. Thick-bed sintering can take advantage of the self-storage effects of the materials layer to lower the consumption of solid fuels, reduce the emission of gaseous
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· An iron ore concentrate of 63% Fe at a Fe recovery of 68% was yielded after 90 min roasting at 850 C with a mass ratio of blast furnace flue dust to iron ore at 0.4 (Rath et al., 2018). Chun et al. found that combined roasting and magnetic separation was an effective way to treat hematite (48.94% Fe) and siderite (35.92% Fe) ores together
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· The current study investigates the effect of microwave processing on low-grade banded iron ore using charcoal, coking coal, and non-coking coal. Charcoal showed better microwave heating response at low temperatures, and the coals exhibit better heating response at higher temperatures. Low carbon dosage ~ 12% is sufficient to
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· The iron ore pelletizing process consists of three main steps: Pelletizing feed preparation and mixing: the raw material (iron ore concentrate, additives—anthracite, dolomite—and binders are prepared in terms of particle size and chemical specifications, dosed, and mixed together to feed the pelletizing process;
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· Humic substance-based binder (HB) has been found to be an effective substitution for bentonite in the production of iron ore pellets. In this study, it was found that the preheating time needed to be prolonged during the pelletization processing which is a remarkable feature of pellets with HB instead of bentonite. As far as the oxidation
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· Iron ore concentrate pellets are traditionally hardened at high temperatures in horizontal grates and grate-kiln furnaces. However, heat induration requires tremendous quantities of energy to produce high-quality pellets, and is consequently expensive. Cold bonding is a low-temperature alternative to heat induration. Pellets can
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:Steam InjectionFuel Combustion Efficiency20 application of steam injection technology, excluding the equipment modification and steam injection cost 21 of $300,000, can achieve a profit of $737491.2 per year.
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Trituradora de piedra vendida por proveedores certificados, como trituradoras de mandíbula/cono/impacto/móvil, etc.
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