Low Temperature Reduction Degradation Characteristics of Sinter, Pellet

This research focuses on the reducibility of iron ore pellet, sinter and lump ore in the blast furnace shaft. The experiments were carried out isothermally with Blast Furnace Simulator (BFS) high ...

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Improving reducibility of iron ore pellets by …

IMPROVING REDUCIBILITY OF IRON ORE PELLETS BY OPTIMIZATION OF PHYSICAL PARAMETERS J. Pal a*, S. Ghorai a, A. Ammasi a, S.K. Hota b, V.M. Koranne b, T. Venugopalan b a CSIR-National Metallurgical Laboratory, Jamshedpur, India b Tata Steel Ltd., Jamshedpur, India (Received 06 December 2015; accepted 27 April 2016)

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Reduction of Iron Ore Pellets, Sinter, and Lump Ore under …

It was seen that in lower temperatures and the gas composition tied to those, iron ore pellets are the fastest to reduce, whereas sinter and lump ore follow behind. In higher temperatures, sinter bypasses the iron ore pellets, and lump ore stays the last in all cases.

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Experimental Investigation of Different Fineness and Firing

2.1. Pellets Making. Iron ore concentrates were collected from Iron ore and Iron ore No.2, located in India. These ores are of pre-Cambrian origin, but Iron ore has a hard laminated nature, while Iron ore No.2 ore has a soft laminated nature.After, the concentration of ore is 62.42% Fe, 2.98% SiO 2, 1.91% Al 2 O 3, and 3.61% L.O.I. (Loss on Ignition).

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Reducibility of iron ore pellets and effect of additions

AbstractThe effect of lime and silica addition on the reducibility, of sintered iron ore and synthetic hematite pellets was investigated. The addition of lime and/or silica (up to about 10% total) to sintered synthetic hematite pellets has little effect on the reducibility at 900°C. Lime additions (with or without silica) lower the reducibility of sintered hematite and magnetite ore pellets ...

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IS 11093 (2001): Iron Ore Lumps for Direct Reduction …

tion degradation index (RDI) or iron oxides: lumps ores sinter and pellets Method for determination of soften-ing point of iron oxides (in powder form) lump ore, sinter and pellets Method for determination of relative reducibility of iron oxides : lump ores, sinter and pellets 3 SUPPLY OF MATERIAL The material shall be supplied in accordance ...

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Three-dimensional characterization of porosity in iron ore pellets…

Consequently, the iron ore charge for blast furnaces can comprise a mixture of ore lump, iron ore sinter, and iron ore pellets. The pellet manufacturing process involves three main stages: raw material preparation, raw pellet formation, and pellet hardening through heat treatment (Zhang et al., 2023).

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Iron ore pellets for blast furnace

What is iron ore pellet. Iron ore pellets are made by adding a small amount of additives to the fine ore powder (-200 mesh, that is, the ore powder with a particle size of less than 0.074mm accounts for more than 80%, and the specific surface area is more than 1500cm2/g), adding water to the pelletizer, relying on capillary force and mechanical force of …

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Reduction of Iron Ore Pellets, Sinter and Lump Ore under …

In this study, the effect of the radial charging position on the reducibility of acid iron ore pellets was investigated using a laboratory-scale, high-temperature furnace in CO-CO2-N2 …

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IMPROVING REDUCIBILITY OF IRON ORE PELLETS BY

The reducibility of iron ore pellets of a specific chemistry can be improved by the optimization of physical parameters such as induration temperature, improving size distribution of fines, …

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Reduction of Basic Iron Ore Sinter under Blast Furnace Wall …

Comparisons to acid iron ore pellets suggest charging the sinter to the BF center and pellets to the wall, with a recommendation to minimize unfused iron ore in the sinter …

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[PDF] Reduction of Iron Ore Pellets, Sinter, and Lump Ore …

Herein, the reducibility of the iron ore pellet, sinter, and lump ore in the BF shaft are focused on. The experiments are conducted isothermally with a blast furnace simulator (BFS) high‐temperature furnace at four different temperatures (700, 800, 900, and 1000 °C) for 300 min. The experimental atmosphere consists of CO, CO2, H2, H2O, and ...

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Quality requirements of iron ore for iron production

Compared with lump ore, sinter and pellets, particularly fluxed pellets, are more porous and reducible with an RI value of often > 65. Lump ores are often less porous and therefore lower in reducibility than sinter and most pellets. The RI value of lump ores varies widely from the middle forties to the low seventies.

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Reduction of Iron Ore Pellets, Sinter, and Lump Ore …

Even though some research has considered all iron-bearing materials (sinter, iron ore pellets, and lump ore), the authors were not able to find researches made in temperatures which simulated the upper part of the BF shaft with a temperature range from 700 to 1000 C, with hydrogen and water vapor in the atmosphere and for all three material types.

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Study on reducibility and porosity of metallurgical sinter

Effect of MgO in the form of magnesite on the quality and microstructure of hematite pellets. Int. J. Miner. Process., 112–113 (2012), pp. 55-62. View PDF View article View in Scopus Google Scholar ... Effects of basicity and porosity on the reducibility of iron-ore sinter. Trans. Iron Steel Inst Jpn., 24 (10) (1984) B332-B332. Google Scholar ...

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Advances in Sintering and Pellet Technology

The objective of iron ore agglomeration is to generate a suitable product of granules in terms of thermal, mechanical, physical, and chemical properties. Sintering and pelletization processes are largely influenced by the source of iron ore and the way in which the beneficiation flowsheet is adopted.

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Reduction and sintering of fluxed iron ore pellets

The performance characteristics of these pellets are normally assessed on the basis of their reducibility values, reduction strength and resistance to clustering. These properties …

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Investigating the Effect of the Iron Ore Pellet Addition on …

The reducibility index (RI) of iron ore, pellet, and sinter was examined individually following the standard method specified in IS 8167:1989. ... Various iron-bearing materials, including pellet, iron ore, sinter, and integrated burdens with different proportions of pellet, were subjected to testing under simulated blast furnace conditions. ...

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A comparative study of pellets, sinter and mixed ferrous …

Raw materials. Commercially supplied iron ore pellets and sinter of size range 10–13 mm are utilised in the present study. Comparable to the utilisation in the industrial blast furnace, two types of olivine fluxed pellets (types 1 and 2) and one type of iron ore sinter are mixed in 40:20:40 ratio to form a ferrous raw material bed.

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Reduction of Iron Ore Pellets, Sinter, and Lump Ore …

Herein, the reducibility of the iron ore pellet, sinter, and lump ore in the BF shaft are focused on. The experiments are conducted isothermally with a blast furnace simulator …

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IS 11092 (2001): Iron Ore Pellets for Direct Reduction …

form) lump ore, sinter and pellets Method for determination of relative reducibility of iron oxides : lump ores, sinter and pellets ... 7.1 The reducibility of the iron ore pellets (dRJdt at 40 percent reduction) shall be 0.6 percent/rein 7:,., minimum, when determinedby the method specified

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Influence of nut coke on iron ore sinter reducibility under …

One of the most important factors to increase the economic efficiency of the blast furnace process is to reduced coke losses (undersieve product known as nut coke). In recent years there has been increased interest in mixing nut coke in the sinter layers. In order to clarify the influence of nut coke on sinter reducibility, sinter and sinter–nut coke mixtures were …

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Reduction of Basic Iron Ore Sinter under Blast Furnace Wall …

The target basicity of iron ore sinter is set by blast furnace slag composition requirements, and therefore varies with the proportion of acid burden such as lump iron ore and pellets.

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Low Temperature Reduction Degradation Characteristics of …

With two kinds of gas composition simulating different iron-making processes, the reduction degradation indices (RDI) of three kinds of iron ores all present the tendency of …

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Iron Ore Agglomeration Technologies

Sintering is a thermal process (1300–1400°C) by which a mixture of iron ore, return fines, recycled products of the iron and steel industry (mill scale, blast furnace dusts, etc.), slag-forming elements, fluxes and coke are …

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Influence of Mineralogy and Pore Structure on the Reducibility and

The target basicity of iron ore sinter is set by blast furnace slag composition requirements, and therefore varies with the proportion of acid burden such as lump iron ore and pellets.

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Effect of Iron Ore Pellet Size on Metallurgical …

Iron ore pellets, sinter and lump ore comprise the main burden of modern blast furnaces. Iron ore pellets are small and hard spherical particles agglomerated from a fine iron ore concentrate. ... The reducibility of the pellets …

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Reducibility of iron ore concentrates

Experimental work has been carried out to measure the reducibility of two types of iron ore concentrates employing both hydrogen and a complex gas mixture containing methane, hydrogen, carbon ...

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Improving reducibility of iron ore pellets by optimization …

reducibility of iron ore pellets of a specific chemistry can be improved by the optimization of physical parameters such as induration temperature, improving size distribution of fines, …

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Quantitative XRD analysis and evaluation of iron ore, sinter, and pellets

Apart from natural iron ore, the Rietveld method has also been applied to study the phases presented in sintered iron ore, or iron ore sinter. A typical outcome from the Rietveld analysis of an iron ore sinter is shown in Fig. 3.4. The composition of the identified sinter phases from the Rietveld analysis is also shown in Fig. 3.4. Reliable ...

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IMPROVING REDUCIBILITY OF IRON ORE PELLETS BY

The reducibility of iron ore pellet has been tried to be improved by adjusting the physical parameters viz. optimization of induration temperature, changing pellet size, changing apparent porosity and pore distribution keeping the same green pellet chemistry and maintaining the other properties in desired levels (drop nos: 7-10, GCS>1 kg/pellet ...

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On the Formation of Porosity in Fluxed Iron-Ore Pellets

According to this model, there should be a linear relationship between the porosity of fired pellets and the sum of substances removed during sintering, i.e., CO 2 in carbonates and water. Figure 1 shows the dependence of the porosity of fired pellets on the mass fraction of substances removed during sintering, which confirms the presented model. In addition, it can …

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Iron Ore Sinter

2.10.5 Effect of coke breeze size on the reducibility of the sinter. ... Iron ore sinter /pellets are redirected from the wall of the blast furnace to the center using the bell-less top charging equipment. The top gas utilization (TGU) improves from 47.5 to 49.0% (an increase of 1.5%) due to better contact of the ferrous burden with the CO-rich ...

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Effect of pellet basicity and MgO content on the quality and

In most of the integrated steel works, the burden mix for blast furnace is decided as per the availability of the iron ore agglomerates like sinter and pellets. More attention has been given in recent years to the use of fluxed pellets in blast furnace due to their good strength and improved reducibility, swelling and softening–melting ...

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Reduction of Acid Iron Ore Pellets under Simulated Wall …

In this study, the effect of the radial charging position on the reducibility of acid iron ore pellets was investigated using a laboratory-scale, high-temperature furnace in CO-CO2-N2 and CO-CO2-H2-H2O-N2 atmospheres up to 1100 °C. ... Iron ore pellets, as well as sinter and lump ores, are commonly used as ferrous burden in blast furnaces. The ...

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