Automated Optical Image Analysis of Iron Ore Sinter
Sinter quality is a key element for stable blast furnace operation. Sinter strength and reducibility depend considerably on the mineral composition and associated textural features. During sinter optical image analysis (OIA), it is important to distinguish different morphologies of the same mineral such as primary/secondary hematite, and types of silico-ferrite of calcium …
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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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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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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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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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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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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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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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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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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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Exploring a new path of green and efficient utilization of sinter
Efficient utilization of sinter return fine is an important measure to reduce cost, increase efficiency, save energy and reduce emission. A new path of green and efficient utilization of return fine was proposed to produce composite pellets. The metallurgical properties of composite pellets under the condition of hydrogen-rich blast furnace were studied. The …
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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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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 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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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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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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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 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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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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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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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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[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 …
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A New Approach of Pelletizing: Use of Low-Grade Ore as a
For carbon neutrality, the use of sinter should be decreased owing to higher CO2 emission in the sintering process of the blast furnace operations. This trend might contribute to the increased use of iron ore pellets with lower CO2 emission in the fabrication process, high reducibility and gas permeability due to higher mechanical strength. The pelletizing process …
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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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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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Study of Softening and Melting Behaviour of …
Softening and melting behaviour of the iron ore materials was studied towards understanding the mechanism of formation of liquid slag and metal phases in the pre-reduced sinter and pellets.
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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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Mineralogical Aspects of Reducing Lump Iron Ore, Pellets, and Sinter
Iron ore, pellets, and sinter were reduced with hydrogen at 800 °C to understand the degree of reduction and the mineralogical aspects. The weight loss of goethite and limonite iron ore was ...
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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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