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After being subjected to geometallurgical evaluation, the iron ores from Singhbhum Bonai-Keonjhar region, eastern India, have been designated as dense martite microplaty hematite high-strength ore (dM-mH-hs ore), massive dense martite microplaty hematite high-strength ore (mdM-mH-hs ore), schistose microplaty hematite low …
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1. Introduction. With the continuous huge demand for steel in China and increasing consumption of high-quality iron ores worldwide, low grade iron ores have been imported in enormous quantities by China, specially alumina-rich iron ores [[1], [2], [3], [4]].Thus, iron ore sinter as the major burden for blast furnace production is achieving …
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The influence of varying amounts of magnesia, silica, and alumina in Iron ore sinter on its mineralogy, reducibility index (RI), reduction disintegration index (RDI), physical breakdown (AI and TI ...
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Alumina affects the sintering of iron ore. The most harmful effect of alumina is to worsen the RDI (reduction degradation index) value of sinter. RDI value increases as the alumina content rises. ... Alumina refractories are the part of alumina- silica (SiO2) group of refractories and belong to the Al2O3-SiO2 phase equilibrium system. They ...
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ABSTRACT. A typical high-alumina containing iron ore slime from the eastern Indian sector containing 58.13% Fe, 6.48% SiO 2, 4.9% Al 2 O 3, and 5.35% LOI, have been evaluated to find out whether grinding of the slimes will be beneficial or not for upgrading the slime to generate pellet-grade concentrate with >64% Fe.Liberation …
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Currently, high-alumina iron ore (Al 2 O 3 > 2.0 wt.%), which has been readily available in the market, is crucial for steel plants to cut costs and enhance market competitiveness. 1–5 The sinter, as a major proportion of blast furnace burden, is …
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The quality of sinter is judged by its chemical, physical and metallurgical properties, which are required for blast furnace. When maximum alumina content in the iron ore fines is 1·5%, alumina to silica ratio of <1·0 is considered to be ideal for blast furnace operation (Rao et al., 2009).Higher alumina to silica ratio, >1·0, is detrimental …
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DOI: 10.1016/j.matchemphys.2020.123733 Corpus ID: 224945825; Effect of alumina and silica content in the calcium aluminosilicoferrite Ca2(Ca,Fe,Mg)6(Fe,Si,Al)6O20 bonding phase on the strength of iron ore sinter
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Effects of alumina in iron ore. ... by 2.2%,decrease in the productivity by4% and an increase in flux consumption by 30Kg /t of hot metal production.The alumina to silica ratio in iron ore should ...
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Minor sections of this work were presented at Iron Ore 2021 (Nunna et al. 2021b), but the work therein has been significantly expanded upon. A number of references have been given in this paper to Iron ore: Mineralogy, processing and environmental sustainability, ed. L. Lu. Cambridge: Woodhead Publishing. A second edition of this …
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Request PDF | Effect of alumina and silica content in the calcium aluminosilicoferrite Ca2(Ca,Fe,Mg)6(Fe,Si,Al)6O20 bonding phase on the strength of iron ore sinter | The use of iron ores with ...
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Due to the presence of more magnetite and less pore phase, the reduction degradation index (RDI) of high alumina sinter with a low coke breeze rate of 65 kg/t shows a more significant value than ...
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The effect of addition of the iron ore on sintering process was also performed in a sintering pot, and the properties of the sinter samples were then examined. The results showed that the melt formation and fluidity properties of the high alumina iron ore were not good, and it had adverse effect on sinter quality. The yield and strength of the ...
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Abstract. Iron ore sinter, constituting a major proportion of blast furnace burden, significantly impacts the blast furnace performance. The chemical composition of iron ore fines, particularly alumina, sinter basicity and sinter MgO together with the thermal conditions that sinter blends are subjected to play an important role in the formation of …
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The present paper highlights the potential of high intensity power ultrasound in iron ore beneficiation in reducing alumina, silica and phosphorous from Noamundi as well as Joda iron ores of M/s Tata Steel Ltd. This will ultimately lead to improve productivity and reduce coke rate of blast furnaces/sinter plants. It has been experimentally …
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Fly ash or coal fly ash causes major global pollution in the form of solid waste and is classified as a "hazardous waste", which is a by-product of thermal power plants produced during electricity production. Si, Al, Fe Ca, and Mg alone form more than 85% of the chemical compounds and glasses of most fly ashes. Fly ash has a chemical …
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The selective granulation process is a new sintering process for high alumina iron ore fines, and can eliminate the adverse effects of 'hard to sinter' or 'unsuitable – for ironmaking' ores. In the present work laboratory sintering experiments have been carried out with iron ore fines of different alumina level (2.00 to 5.46 mass ...
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The impurities in iron ore are alumina and silica and these are separated through a process known as beneficiation. Approximately, 15–20% of the total beneficiation plant input is discarded as slime. ... Effect of alumina and silica percent with pressure for two different vortex finder dia. is shown in Fig. 9, Fig. 10.
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Aiming at the effective utilization of the abundant high-alumina iron ores with low iron grade, the influence of alumina concentration and type on high-temperature characteristics was …
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K. Haga et al. DOI: 10.4236/jmmce.2018.63027 387 J. Minerals and Materials Characterization and Engineering the effect of matrix equipment. Iron with grade of 49.70 mass% and recovery of
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A typical high-alumina containing iron ore slime from the eastern Indian sector containing 58.13% Fe, 6.48% SiO2, 4.9 % Al2O3 and 5.35% LOI, have been evaluated to find out whether grinding of the ...
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The structure of iron ore sinter is not uniform. It consists of pores (of varying sizes) and a complex aggregate of phases, each with different properties. It is the combination of these pores and phases, and the interaction between them that determines the sinter properties, but also makes the prediction of sinter properties so difficult1,2. …
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Elaboration from clay (kaolin, mixtures of clay and alumina): mullite is obtained by reaction between silica and alumina present in the clay. The firing temperature ranging between 1200 and 1400 °C. Elaboration from sillimanite minerals and bauxite: This type of refractory is characterized by its high refractoriness, good mechanical strength ...
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DOI: 10.1016/J.MINPRO.2016.01.021 Corpus ID: 100997058; Role of silica and alumina content in the flotation of iron ores @article{Sahoo2016RoleOS, title={Role of silica and alumina content in the flotation of iron ores}, author={Hrushikesh Sahoo and Swagat S. Rath and Danda Srinivas Rao and Barada Kanta Mishra and Bisweswar Das}, …
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With the intensified depletion of high-grade iron ores, the increased aluminum content in iron ore concentrates has become unavoidable, which is detrimental to the pelletization process. Therefore, the effect mechanism of aluminum on pellet quality must be identified. In this study, the influence of aluminum occurrence and content on the …
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Fly ash is a by-product from burning of coal. Utilization of fly ash by carbothermic reduction is an effective way to recover aluminum, silicon, and iron to enhance product-added value. This work is focused on the phase transformation of Al2O3, SiO2 and Fe2O3 during carbothermic reduction of fly ash in air. A comparative …
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Umadevi T et al (2009) Influence of alumina on iron ore sinter properties and productivity in the conventional and selective granulation sintering process. Steel Res Int 80(9):10–15. Google Scholar Lu L, Holmers RJ, Manuel JR (2007) Effects of alumina on sintering performance of hematite iron ores. ISIJ Int 47(3):349–358
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This is known that alumina has acidic nature with silica; it tends to deteriorate the structure of iron fayalite. Eventually, this makes silica disable to hold magnetite ... Kawachi S, Kasama S (2011) Effect of micro-particles in iron ore on the granule growth and strength. ISIJ Int 51(7):1057–1064.
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The effect of alumina and silica on the reaction kinetics of carbon composite pellet at 1474 K (1200°C) was investigated. Following conclusions can be made from this study. (1) The reduction rate of iron oxide in carbon composite pellet was influenced by alumina and silica contents.
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The iron ore from Sandur-hospet region in Karnataka content high alumina and low silica which in turn increase the Alumina silica ratio of feed iron ore concentrate to pelletization. During ...
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