effect of high alumina in iron ore

  • Effects of alumina in iron ore ResearchGate

    High alumina, usually found in Indian iron-ore conditions, are unsuitable for blast furnace process. Alumina being acidic, it decreases the basicity of slag, thereby leading to a thicker slag

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  • What are the advantages and disadvantages of high silica

    High silica, low alumina iron ores have no specific disadvantage in blast furnace iron making, unless silica is so high that it results in large slag volume. Low Al2O3 in ore facilitates and helps

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  • Alumina and its Role in Iron and Steelmaking IspatGuru

    High alumina in the iron ore raises the levels of alumina in blast furnace slag. To operate a blast furnace with high alumina slag is quite difficult and need a different type of skill from the blast furnace operators since with the increase in the Al2O3 content of the slag, the blast furnace operation has problems such as excess accumulation of molten slag in the blast furnace hearth and

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  • Influence of sinter basicity (CaO/SiO2) on low and high

    The quality of iron ore presently being used calls for extensive investigations to produce low basicity sinter with high alumina iron ore. Studies have been carried out on low and high alumina iron ore fines to know the influence of sinter basicity and fuel (coke breeze) addition on sinter mineralogy, properties and productivity. It is found that with increase in sinter basicity, sinter

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  • Influence of high grade iron ore usage on the performance

    of using high grade ore to the performance of Sintering and Blast Furnace processes in terms of energy savings, CO 2 emissions, and logistic benefits to the mills in the region. Keywords: high grade iron ore, sinter, blast furnace, Brazilian fines, pot sinter, Alumina * Msc. Metallurgical Engineer R&D Technical marketing Vale S.A. Brasil

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  • Influence of Alumina on Iron Ore Sinter Properties and

    Ore with higher alumina content is usually expected to be detrimental in forming the sinter matrix, if sintered alone, due to the low reactivity of alumina bearing minerals and the high viscosity of primary melts. 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

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  • High Alumina Slag and Blast Furnace Operation IspatGuru

    Blast furnace slag alumina (Al2O3) is mainly dependent on the alumina content of the input materials mainly iron ore. In those cases where iron ore alumina is less than 1 % the alumina content in the slag hardly goes above 10 %. But in some iron ores (normally found in India) alumina content is 2 % and higher. Such ores raise the alumina levels in blast furnace slag to 20 % and higher. To

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  • Processing of high alumina iron ore slimes using

    High alumina iron ore slimes from Joda, India are processed using classification with hydrocyclone and flotation. Slimes are characterized using QEMSCAN, SEM and XRD. The effect of hydrocyclone design variables on grade and recovery is investigated. Flotation of hydrocyclone underflow using amines and fatty acid as collector is studied. The SEM image below shows the complexity of the material

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  • Effect of Alumina and Magnesia on Microstructure and

    07.02.2017· Zhang M, Andrade M (2016) Effect of MgO and basicity on microstructure and metallurgical properties of iron ore sinter. In: Ikhmayies SJ, Li B, Carpenter JS, Hwang J, Monteiro SN, Li J, Firrao D, Zhang M, Peng ZW, Escobedo JP, Bai C (eds) Characterization of minerals, metals, and materials.

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  • Effects of Alumina on Sintering Performance of Hematite

    However, due to the limited reserves and increasing depletion of high-grade iron ore resources, the alumina content of iron ores is expected to increase gradually. While the increase in such constituents is relatively slow over a long period, it has still caused problems for blast furnace operators. This paper attempts to clarify the role of different types of alumina present in iron ore fines

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  • Roles of Alumina and Magnesia on the Formation of SFCA

    Indian iron ore contains higher alumina, while the sinter here has higher basicity than found elsewhere. Softening-Melting studies of various Indian iron ores, sinters and their combinations have

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  • Mineralogy and Geochemistry of A Low Grade Iron Ore Sample

    Higher the iron content in the ore higher is the blast furnace productivity (as per the operating practices, the increase of Fe concentration in the feed by 1% will increase the productivity by 1.5 to 2.5% and reduce the coke consumption by 0.8% to 1.2%). The reduction of alumina in blast

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  • effect of alumina in iron ore BINQ Mining

    01.12.2012· effect of high alumina in iron ore Grinding Mill China. Posted at: August 14, 2012. Influence of Alumina on Iron Ore Sinter Properties The selective granulation process is a new sintering process for high »More detailed

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  • Indian Iron Ore Scenario : Low Grade Iron Ore Beneficiation

    Due to the high quality of iron ore available in India, large deposits of Banded Haematite Jasper (BHJ) are left unused because of the presence of silica in unwanted quantity. ROM is put through washing to remove the clayey matter due to the presence of alumina and silica in iron ore leading to slime generation which are disposed off in tailing ponds. Slime in these tailing ponds contains iron

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  • Review Effects of Alumina on Sintering Performance of

    High alumina iron ores can be divided into two types, SA and A, where the alumina in SA type iron ores consists of Effects of Alumina on Sintering Performance of Hematite Iron Ores L. LU, R. J. HOLMES and J. R. MANUEL CSIRO Minerals, P.O. Box 883, Kenmore, Qld. 4069, Australia. (Received on May 15, 2006; accepted on December 4, 2006) The integrated blast furnace and oxygen

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  • Effects of Alumina on Sintering Performance of Hematite

    However, due to the limited reserves and increasing depletion of high-grade iron ore resources, the alumina content of iron ores is expected to increase gradually. While the increase in such constituents is relatively slow over a long period, it has still caused problems for blast furnace operators. This paper attempts to clarify the role of different types of alumina present in iron ore fines

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  • Processing of high alumina iron ore slimes using

    High alumina iron ore slimes from Joda, India are processed using classification with hydrocyclone and flotation. Slimes are characterized using QEMSCAN, SEM and XRD. The effect of hydrocyclone design variables on grade and recovery is investigated. Flotation of hydrocyclone underflow using amines and fatty acid as collector is studied. The SEM image below shows the complexity of the material

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  • Effect of Alumina on Liquid Phase Formation in Sintering

    As an important component of gangue in iron ore, alumina affects the amount of liquid phase by influencing the formation of calcium ferrites‐bonding phase. In this work, the hematite solid solution with aluminum (H ss ) was prepared and sintered with CaO to investigate the effect of alumina on liquid phase formation in sintering process of iron ore fines.

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  • Phosphorus Control in DRI-EAF Steelmaking:

    Flexibility in raw materials, the lower natural gas prices, and the increased use of nonconventional Electric Arc Furnace (EAF) steelmaking using up to 100% Direct Reduced Iron (DRI) have prompted a renewed interest in better control of phosphorus. Iron ore and DRI have higher phosphorus and silica compared to scrap. Although significant work has been done on understanding the partitioning of

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  • Mineralogy of Iron Ores of Different Alumina Levels from

    Singhbum, Iron Ore, Sintering, Alumina 1. Introduction Iron is found in many mineralogical forms, but only a few are used as commercial sources, the most important of which are oxides (Hematite Fe 2O 3, Magnetite Fe 3O 4, and Limonite Fe 2O 3∙2H 2O & Goethite Fe 2O 3∙H 2O). Oth-M. Sinha et al. 181 er less important sources are Carbonates (FeCO 3), Sulphides (Pyrite FeS 2) and Silicates

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