iron ore sinter pellets reducibility

1990 Fundamental study of pore formation in iron ore ...

sinter or pellets in the make up of their charge for various reasons, overall, lump ores.sinter and pellets are used in proportions of 1:2:1 in blast furnace burdens [14]. 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…

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IRON ORE SINTERING PART 2. QUALITY INDICES AND ...

reduction in sinter strength, reducibility and productivity [11,12]. In research carried out in a sinter pot with 65 kg of raw mix, the MgO content of four manufactured sinters was increased from 1.4 to 2.6% by the addition of dolomite to the mix. The iron ore used presents a low MgO content (0.01%) and a high Al 2 O 3 content (2.99%).

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(PDF) COMPARISON OF SINTER AND PELLET USAGE IN AN ...

The global seaborne iron ore market including si nter feed, lump ore, pellets and pellet feed has rapidly increased over the last decade. While sinter feed sales dominate the

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ALTERNATIVE BINDERS TO BENTONITE FOR IRON ORE …

silica to the finished product pellet. Since the purpose of iron ore processing is to remove silicate ... Reducibility of magnetite pellets sintered at 1300oC and reduced at 900oC for 3 hour 3.2. Swelling index of pellets ... pellets sintered pellets at 1100oC are given in Figure 2. In the images, separate grains of pellets can

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US20140096650A1 - Process for the improvement of ...

The present invention discloses a new process for the improvement of reducibility of iron ore pellets comprising the steps of preparing a raw material mixture which contain metallic Ni powder, pelletizing the said mixture obtained, burning the said raw pellets and reducing the said burnt pellets under reducing conditions with presence of CH 4 .

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

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

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.

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REDUCIBILITY PROPERTIES OF ERDEMIR SAMPLES A THESIS ...

The effect of physical, chemical and mineralogical properties on reducibility of iron containing raw materials were studied with the use of two pellets, one sinter and one lump iron ore sample provided by Erdemir integrated iron and steel works. Although Erdemir lump iron ore …

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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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reducibility of iron ore and coke rate in blast furnace

Quality Improvement of Sintered Ore in Relation to Blast Furnace ... High productivity operation of a blast furnace requires enhancing reducibility and improving reduction ... first dripping of iron ore from a graphite crucible) and the composi- .... ficient as high as 2.37 t/d/m3 and a high ore…

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Iron Ore Agglomeration Technologies

iron ore sinter strands, producing in the first decade of the twenty-first century 130 million ... good reducibility; and, high iron content. As in the case of the sintering, mixing is an important step to obtain homogenous pellets. This ... Rotary Heating Furnace pellets, or iron ore-coal composite pellets. This kind of pellets does

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Automated Optical Image Analysis of Iron Ore Sinter - MDPI

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 and aluminum (SFCA).

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Reducibility of iron ore pellets and effect of additions ...

Abstract. The 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.

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Reduction Kinetics of iron ore pellets and effect of binders

pellets using various binders, afterwards indurating the newly formed pellets to strength high enough to survive transportation. Experimental Iron ore from Gandha Mardana mines and charcoal were used in the experiment .Analysis of the iron ore showed that it …

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Synthetic olivine in the production of iron ore sinter ...

12. An iron ore sinter according to claim 6, ... B--Sinter Versus Pellets for Use in Blast Furnaces. Sinter Production. As explained hereinabove, the primary iron-bearing materials used for the production of iron in a blast furnace are iron ore agglomerates in the form of sinter or pellets. ... A high reducibility of sinter, therefore, reflects ...

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Iron and Steel - Converting by-products to feedstock - Steele

Better durability and reducibility for your circular economy. Stiff extrusion uses cold bonding, which eliminates the need for gas, hearing or firing to recover lost iron and carbon units, for a critical drop in your CO 2 emissions.. Conversion — Iron- and carbon-rich fines, dust and wet sludge converted to high-quality feedstock; Mixing— Connects fine carbon particles to iron oxides for ...

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reducibility-ore-sinter-pellets-testing-determining-RDI ...

The RF-33/TV/RDI has been designed primarily to test the properties of the iron ore charge – lump ores, pellets, and sinter. However, in case of adding the coke making software modules and CSR testing equipment, it is also possible to test coke properties alike with the RF-33, RF-33/KK or RF-33/TV Systems. The RF-33/TV/ RDI …

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Improving reducibility of iron ore pellets by optimization ...

Use of agglomerates such as pellets and sinter in blast furnaces is increasing day by day to utilize fines and concentrates replacing lump ore. Reducibility mostly depends upon the individual ore character and its agglomeration parameters. To increase the performance of pellet in blast furnace, it is required to improve the reducibility of ...

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RESEARCH ON HIGH TEMPERATURE PROPERTIES OF IRON …

reducibility rate was studied according to OSP 4695:2007. The sample of 10 -12,5 mm grain size was inserted into the retort of testing device and heated by invariable input in the environment of flowing nitrogen to the temperature of 950 °C. The reducibility of pellets was compared with reducibility of iron ore and sinter.

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US9169532B2 - Process for the improvement of reducibility ...

A process for the improvement of reducibility of iron ore pellets including the steps of preparing a raw material mixture which contains metallic Ni powder, pelletizing the mixture obtained, burning the raw pellets and reducing the burnt pellets under reducing conditions in the presence of CH 4 .

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Iron ore pelletization - ScienceDirect

15.1. Introduction. Iron ore lump, sinter, and pellets comprise the main burden of modern blast furnaces. However, sinter and pellets are now the dominant blast furnace burden, because the natural lump supply has declined dramatically due to depletion of the world's high-grade competent iron ore resources.

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(PDF) Iron Ore Sinter: Impure Limestone Flux | Ithuteng ...

(BDLive 2015) 1.2 Project Purpose The objective of the project is to study iron ore sinter with an impure limestone addition. This includes conducting chemical analyses to determine the types and amounts of phases present in the sinter. Furthermore, the results are to be compared to those of iron ore sinter that had pure limestone as the flux.

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Effect of Mineral Composition and Pore Structure on ...

tion and pore structure are desirable from the viewpoint of the reducibility of the composite iron ore sinter, the hydrogen reduction experiments are conducted at 1173K. The reduction rate of the composite iron ore sinter, which is composed of the dense pre-granulated pellet …

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Reduction and sintering of fluxed iron ore pellets - a ...

Reduction and sintering of Ouxed iron ore pellets-a comprehensive review by S. Prakash * Synopsis Iron ore pellets with or without additives are commonly used as alternate charge material in both conventional and newer ironmaking processes. The performance characteristics of these pellets are normally assessed on the basis of their reducibility

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Pellet, iron ore concentrste, sintered iron ore: buy from ...

Iron ore concentrate is produced from the magnetite iron ore in the beneficiation process and is used for the production of pellets for blast furnaces and sinter. The concentrates are non-toxic, non-flammable and non-explosive. The concentrate is shipped as a bulk commodity by rail using the open-top rolling stock and by sea. Manufacturer: SevGOK.

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Using a Mathematical Model of Counter-Current Flow in a ...

pellet, and sinter reducibility tests. The laboratory device tests reducibility of the ore burden in the isothermal zone, called also as the thermal reserve zone. The maximum working temperature is 11008C. The furnaces include (Figure 1) a system for handling and metering the gases and their final combustion in a gas burner. A refractory

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UDC 622 . 785 . 5 : 669 . 162 . 26 . 012 . 4 Quality ...

reduction behavior of sintered ore Since an improvement in the reducibility of sinter decreases bulk iron oxide, FeO, it presumably improves the softening and melting behavior of sinter by decreasing the formation of melt during reduc-tion, without having to change the chemical composition of the sin-

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reducibility-ore-sinter-pellets-testing-determining-RDI ...

The RF-33/TV/RDI has been designed primarily to test the properties of the iron ore charge – lump ores, pellets, and sinter. However, in case of adding the coke making software modules and CSR testing equipment, it is also possible to test coke properties alike with the RF-33, RF-33/KK or RF-33/TV Systems. The RF-33/TV/ RDI System therefore ...

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Characterisation of the Physical and Metallurgical ...

Iron Ore Sinter. Iron ore sinter or simply called sinter is usually the major component of a blast furnace iron bearing burden material. Sinter normally consists of various mineral phases produced by sintering of iron ore fines with fluxes, metallurgical wastes and a solid fuel. Coke breeze is normally used as fuel in the sinter mix since it ...

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iron ore pellet reduction process

Reduction of Iron Ore Pellets, Sinter, and Lump Ore . Reduction of Iron Ore Pellets, Sinter, and Lump Ore under Simulated Blast Furnace Conditions Anne Heikkilä,* Mikko Iljana, Hauke Bartusch, and Timo Fabritius 1. Introduction A blast furnace (BF) is …

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Influence of sintering conditions on the reducibility of ...

During iron ore sintering the green granulated sinter bed undergoes significant changes in its structure and mineralogy due to the formation of liquid in the flame front. These changes influence the sinter reducibility, which is an important parameter influencing the productivity and fuel efficiency of the blast furnace. Bulk measurement of sinter product from sinter pots and sinter strands ...

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Iron Ore Agglomeration Technologies | IntechOpen

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 agglomerated in a sinter plant with the purpose of manufacturing a sintered product of a suitable chemical composition ...

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Preparation of MgO added iron ore pellets and effects on a ...

increasing the content of MgO in iron ore pellets, not only the metallurgical performances of pellets are improved, but also the MgO content in sinter (another burden of blast furnace) decrease, because the excess MgO in sinter causes many negative effects such as the sintering rate, the fuel rate, and the sinter strength and reducibility ...

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Automated Optical Image Analysis of Iron Ore Sinter

Together with lump iron ore and pellets, iron ore sinter is one of the major feeds for the production of iron in the blast furnace and can constitute up to 70–85% of the total ferrous burden. Sinter is a heterogeneous mix of hematite (primary unreacted or secondary), magnetite, complex ferrite phases known as SFCA (silico-ferrite of calcium and

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EFFECT OF MAGNETITE, HEMATITE AND PELLET …

The LKAB production volume is dominated by iron ore pellet, however a significant volume of ore for sinter production is also produced. In this study, three types of LKAB ore suitable for sinter production has been tested compared to a reference sinter. Sinter preparation and experimental equipment The sintering tests were conducted at ...

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Influence and mechanism of Indonesia vanadium titano ...

In order to provide a reliable reference for utilizing Indonesia vanadium titano-magnetite (VTM) in blast furnace (BF) economically, metallurgical properties of iron ore sinter with addition of Indonesia VTM in mixed sintering materials were investigated, including low-temperature reduction degradation index (RDI), reducibility index (RI), and softening/melting properties. Additionally ...

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