calculation of limestone requirement for sintering of iron ore

required to produce 0.9 Mg (1 ton) of product sinter. 12.5.1.2 Iron Production - Iron is produced in blast furnaces by the reduction of iron bearing materials with a hot gas. The large, refractory lined furnace is charged through its top with iron as ore, pellets, and/or sinter; flux as limestone, dolomite, and sinter; and coke for fuel

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Modeling Sintering Process of Iron Ore Jose Adilson de Castro Graduate Program on Metallurgical Engineering -Federal Fluminense University Brazil 1. Introduction In this chapter, a methodology for simulating th e sintering process of iron ore is presented. In order to study the process parameters and inner phenomena, a mathematical model

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1.1.2 Sintering process Sintering of iron ore is a process [5,6,8] in which air is drawn down through a bed of raw mixture of iron ore, limestone, coke and other minor additives. The iron ore may be natural ore, which usually has a particle size up to 10mm, or concentrate which is very fine with a

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May 26, 2020 As these ratios change, the allowable proportions of lump, pellet and sinter iron ore will change, as will the required additions of limestone, production of slag, and composition of the PI or DRI, all of which will affect the energy requirements for both the

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materials used in sintering are Iron ore fines, Coke breeze, Limestone, Dolomite, Sand, Metallurgical waste and Lime. Physical properties: Iron ore fines used for sintering should be of the size of 0-10 mm. More of 1 mm fraction will reduce bed permeability and will reduce the vertical speed of sintering reducing machine productivity

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Specifically, iron ore sintering requires the use of fine ore, produced by crushing high-grade iron ore into particles only a few millimeters in diameter. Depending on the specific machine and iron ore sintering process used, substances such as coke breeze and burnt limestone are used to ignite and heat the iron ore particles until the

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May 01, 2011 A schematic diagram of a typical iron-ore sintering plant is shown Fig. 1.The sintering process converts iron ore fines ( 6.3 mm) into larger agglomerates, which possess the strength, thermal and reduction characteristics as well as gas permeability required for efficient blast furnace operations.The process is carried out by mixing and granulating a carefully blended mixture of fine iron

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The blast furnace is still the dominant form of iron production, but over the years, direct reduction methods have increased due to a number of reasons. Overall, iron production methods have optimal requirements with respect to the feed materials especially iron ore. In this study, tests were carried out on Muko iron ore from Uganda to analyse its suitability to meet the feed requirements of

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Apr 29, 2016 BURDEN PREPARATION 1-Iron ore fines agglomerated by sintering and pelletisation. 2-incorportion of flux in the sinter (fluxed and super fluxed sinter) 3-incorportion of mgo in the form of dolomite in the sinter to offset the ill effect of high alumina under Indian condition. 4-Increased in the strength of pellets with lower fuel consumption

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Jul 11, 2018 The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. This chapter shows the status of the pelletizing process

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The proportioning of iron ore is the first step of the sintering process. It mixes different kinds of iron ores with coke, limestone, dolomite, and returned sinter to produce a raw mix for the

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3.2. Sintering of High Fe Ore and MgO requirement The Ore fines had very low content of gangues, SiO2 and Al2O3 being 1.95% and 1.70%, respectively having Fe 65.20%. The blast furnace requirement for sinter basicity, CaO/SiO2 and its MgO (%) was in the range of 1.8-2.0 and 2.5

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2.3. Sintering Charge Calculation. Basic assumptions for calculation of charge mix for sinter was produced in pilot sinter plant with basicity (Ca0/Si02) was 1.5, 1.73 and 2.2. Whereas, amount of coke breeze and iron ore was used in each experiments 300gm and 3kg simultaneously

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sinter . Simultaneously, a requisite amount of available lime in sinter eliminates limestone from the burden: thus calcination, which is highly endothermic reaction, can be can be avoided to take place inside the furnace. Theoretical calculation • shows that approximately 0.26 kg of carbon is saved for every kg of limestone removed

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In this study, an improved DEM model for the iron ore sintering has been developed by combining the solution of the mathematical equations to describe the above physico-chemical and thermal mechanisms involved in the sintering process. The present paper gives the outline of the model and its results of calculation under different conditions. 2

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During the iron ore sintering process, the loose raw materials, mixtures of fine ore, limestone flux and coke breeze, are converted into a porous but physically strong cake, which is generally composed of four main phases: iron oxides, ferrites, most of which are a complex silico-ferrite of calcium and aluminum (SFCA), glasses and dicalcium silicate

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steel making. The iron ore sintering process is extremely complicated, involving a large number of inter-related vari-ables. Since the 1950s many studies have been carried out to understand the factors that determine sinter plant perfor-mance – usually expressed in terms of productivity, coke requirements and product quality – and the

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The. main steps in the sintering process are: Blending – a range of iron ore fi nes from different suppliers. are blended with steelworks recycle materials. Mixing – a reductant such as coke

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Low-temperature ( 1300 C) iron ore sinter is an agglomerate of unmelted and partially melted nuclei particles (+ 1 mm) and a matrix bonding phase produced from the melting of fine ore (− 1 mm) and flux particles, with the majority of melt formation occurring in the granule adhering fines layer. The majority of nuclei are hematitic, but they can also be any other unreacted particles such as flux or aluminosilicate

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1. INTRODUCTION. The sintering process is used to agglomerate a mix. of iron ores (natural or synthetic), return fi nes, fl uxes. and coke, with a particle size of 8 mm, so that the. resulting

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8 mm. HPS feed consists of iron ore as pellet feed fines, return fines and iron and steel work remnants, filter dust, additives and binders like limestone, dolomite, bentonite and coal dust. These micro pellets are fed onto a sinter machine to produce sinter cake, which is then broken down and smelted in a

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Jul 07, 2017 In case of sintering, limestone is crushed to -3 mm (in the range of 85 % to 90 %) in hammer crushers before mixing it in the sinter mix. In case of direct feed to blast furnace, limestone lumps of 10 mm to 40 mm size are used. In case of limestone addition through sintering, these days calcined limestone (lime) is also directly being used

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