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Reduction of Iron Ore Pellets, Sinter, and Lump Ore

Reduction degrees as a function of time in all studied temperatures (700, 800, 900, and 1000 °C) for iron ore pellets, sinter, and lump ore are shown in Figure 3. It is shown that the lump ore has the slowest reduction rate at each studied temperature. Pellets were the fastest to reduce in 700 °C, but already at 800 °C, sinter bypasses it and has the highest rate of reduction. Sinter has the highest reduction

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Reduction of Iron Ore Pellets, Sinter, and Lump Ore

It is found that lump ore has lowest reduction rate in all test conditions, and at lower temperatures iron ore pellets reduce faster than sinter, and this is reversed at higher temperatures. Furthermore, the reduction rate of sinter and iron ore pellets begins to resemble each other at higher temperatures.

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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 hematite pellet.

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IS 11292 (1985): Determination of relative reducibility of ...

30/05/1985  reducibility of iron oxides; lump ores, sinters and pellets. The test is to be conducted under specific conditions, for example, isothermal reduction, reduction in a fixed bed, reduction by means of carbon monoxide and nitrogen mixture, and a sample having a

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Reduction of Iron Ore Pellets, Sinter, and Lump

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, CO 2, H 2, H 2 O, and N 2 simulating the conditions in the BF shaft ...

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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 hematite pellet. Reducibility of iron oxide pellet ...

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IS 11292 (1985): Determination of relative reducibility of ...

30/05/1985  iron oxides:lump ore,sinter and pellets [MTD 13: Ores and Raw Materials] IS : 11292 - 1985 hdiaut Standard METHOD FOR DETERMINATION OF RELATlVE REDUCIBILITY OF IRON OXIDES: LUMP ORES, SINTER AND PELLETS Ores and Raw Materials Sectional Committee, SMDC 16 Chairman SHRI L. D. S-ANT Representing Chowgule Co Pvt Ltd, Mormugao Harbour (Goa)

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iron ore sinter and pellet - proves-projekt.de

Introduction to Iron ore Pellets and Pelletizing processes . Iron ore pellet is a kind of agglomerated fines which has better tumbling index when compared with the iron ore and it can be used as a substitute for the iron ore lumps both in the bf and for dri production pellets have good reducibility since they have high porosity to normally pellets are reduced considerably faster than sinter

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EFFECT OF SIZE OF IRON ORE PELLETS ON ITS REDUCTION

various factors which affect the reducibility of th e iron ore pellet. In our project we aim at studying the effect of size of iron ore pellet on i ts reduction kinetics and in the course of our experimentation we aim at arriving at particula r pellet size that gives both increases in productivity and decrease coke rate. Pellets are approximately spherical lumps formed by agglomeration of the ...

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reducibility-ore-sinter-pellets-testing

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 can be, generally said, widely usable for studying ...

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Reduction Kinetics of iron ore pellets and effect of binders

Reduction of Iron Ore Pellets with a particular percentage of binders i.e. 2% of Dextrine and 2% of Bentonite was carried out for the temperature range 900 to 1050°C. In reduction kinetic study the most satisfactory model was to taken, the slope of the initial linear region of fractional reduction vs. time curve was measured, which gives the rate constant (k). Ln k vs. 1/T plots were straight ...

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Iron Ore Sintering: Quality Indices - ResearchGate

Iron ore; reducibility; RDI; ... operate 34 iron ore sinter plants with 63 iron ore sinter strands, which in the first decade of the 21st century manu- factured 130 million tons of sinter annually ...

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iron ore sinter and pellet - proves-projekt.de

iron ore sinter and pellet. Sep , globally, around two billion tonnes of iron ore average is used in the form of lumpssinterpellets to produce steel however, the reserves of highgrade ore are depleting rapidly due to which the adoption of beneficiation technologies such as sintering and pelletizing to utilise fine ore and lowgrade ore is attracting heightened

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Iron Ore Sinter – IspatGuru

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 supplies necessary heat energy for sintering of ...

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Reduction Kinetics of iron ore pellets and effect of binders

Reduction of Iron Ore Pellets with a particular percentage of binders i.e. 2% of Dextrine and 2% of Bentonite was carried out for the temperature range 900 to 1050°C. In reduction kinetic study the most satisfactory model was to taken, the slope of the initial linear region of fractional reduction vs. time curve was measured, which gives the rate constant (k). Ln k vs. 1/T plots were straight ...

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Effect of Temperature, Time, and Cooling Rate on the ...

on the Mineralogy, Morphology, and Reducibility of Iron Ore Sinter Analogues TOBIN HARVEY ,1 MARK I. POWNCEBY,2 JEFF CHEN,3 NATHAN A.S. WEBSTER,2 THI BANG TUYEN NGUYEN,1 LEANNE MATTHEWS,1 DAMIEN O’DEA,4 and TOM HONEYANDS1,5 1.—The Australian Research Council (ARC) Research Hub for Advanced Technologies for Australian Iron Ores, University of

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Reducibility and reduction swelling behaviour of some iron ...

Iron ore pellets are used for the production of hot metal in blast furnaces and DRI/HBI in direct reduction processes. A blast furnace is a shaft furnace, which is charged with iron bearing materials (pellets, sinters and/or lump ore), reducing agents (metallurgical coke) and additives (limestone, quartz, BOF slag). Metallurgical coke and auxiliary reducing agents (coal, oil, natural gas) are ...

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(PDF) Study of Softening and Melting Behaviour

Iron ore in the form of pellets, and sinters, were used for the measurements. The samples were placed in a graphite crucible shielded with argon. The sample material was subjected to the pressure ...

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EFFECT OF SIZE OF IRON ORE PELLETS ON ITS REDUCTION

various factors which affect the reducibility of th e iron ore pellet. In our project we aim at studying the effect of size of iron ore pellet on i ts reduction kinetics and in the course of our experimentation we aim at arriving at particula r pellet size that gives both increases in productivity and decrease coke rate. Pellets are approximately spherical lumps formed by agglomeration of the ...

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iron ore sinter and pellet - proves-projekt.de

iron ore sinter and pellet. Sep , globally, around two billion tonnes of iron ore average is used in the form of lumpssinterpellets to produce steel however, the reserves of highgrade ore are depleting rapidly due to which the adoption of beneficiation technologies such as sintering and pelletizing to utilise fine ore and lowgrade ore is attracting heightened

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(PDF) Iron ore sintering- venkata krishnaiah -

Sinter structure (dA) of sinters before and after being subjected to the reducibility test: Given the diversity of the mineralogical components that comprise the raw mix, as well as the heterogeneity of P = (dR - dA) / dR (1) the mix, it is understandable that the sinter structure will also be complex, being formed mainly by grains of iron Sinters experience a strong increase in porosity after ...

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Iron Ore Testing Apparartus - Salvin Instruments

Determination of Softening Melting Characteristic of Iron ore lumps/ Pellets/Sinter; Application : Iron Ore, Lumps, Sinter and Pellet ; RI/RDI Test Apparatus . View Project. RI/RDI Test Apparatus . Standard : IS – 8167:1989, 10823 ISO: 4696 ; Determination of Reducibility index/low temperature reduction disintegration index by static method ; Application : Iron Oxide , Lump Ores, Sinters ...

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Characterisation of the Physical and Metallurgical ...

Table 3 shows some of the characteristic requirements on natural iron ore lump, pellets and sinters, to serve as a feed material to the main iron production processes. The characteristics of Muko iron ores from the different deposits are also given in this table. It follows from Table 3 that the iron ores Ug1–Ug5 meet the chemical requirements as natural materials for the BF (Routes 1 and 4 ...

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Theory and Practice of Sintering of Iron ore –

Sintering of iron ore is a generic term which is used to describe the process whereby a sinter mix (raw mix or green mix) of iron ore fines, fluxes, fuel (coke breeze) and plant return fines (e.g. mill scale, blast furnace dust, and returned sinter fines etc.) are converted into a particular form of agglomerate. It consists of heating the sinter mix with a particle size of less than 10 mm to ...

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reducibility-ore-sinter-pellets-testing

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 can be, generally said, widely usable for studying ...

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iron ore pellets versus sinter in blast furnace

influence on the blast furnace process efficiency Reducibility of a sinter and pellets is the major quality index which is necessary to take into account at the estimation consumer properties of the prepared iron ore raw materials (1) Reducibility is ability of iron ore material to give oxygen from --> Get Price. why sinter is used in blast furnace. The purpose of the sinter plant is to ...

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EFFECT OF SIZE OF IRON ORE PELLETS ON ITS REDUCTION

various factors which affect the reducibility of th e iron ore pellet. In our project we aim at studying the effect of size of iron ore pellet on i ts reduction kinetics and in the course of our experimentation we aim at arriving at particula r pellet size that gives both increases in productivity and decrease coke rate. Pellets are approximately spherical lumps formed by agglomeration of the ...

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iron ore sinter and pellet - proves-projekt.de

iron ore sinter and pellet. Sep , globally, around two billion tonnes of iron ore average is used in the form of lumpssinterpellets to produce steel however, the reserves of highgrade ore are depleting rapidly due to which the adoption of beneficiation technologies such as sintering and pelletizing to utilise fine ore and lowgrade ore is attracting heightened

Free Chat

Reducibility and reduction swelling behaviour of some iron ...

Iron ore pellets are used for the production of hot metal in blast furnaces and DRI/HBI in direct reduction processes. A blast furnace is a shaft furnace, which is charged with iron bearing materials (pellets, sinters and/or lump ore), reducing agents (metallurgical coke) and additives (limestone, quartz, BOF slag). Metallurgical coke and auxiliary reducing agents (coal, oil, natural gas) are ...

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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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Influence of nut coke on iron ore sinter reducibility ...

Abstract 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 isothermally ...

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(PDF) Iron ore sintering- venkata krishnaiah -

Sinter structure (dA) of sinters before and after being subjected to the reducibility test: Given the diversity of the mineralogical components that comprise the raw mix, as well as the heterogeneity of P = (dR - dA) / dR (1) the mix, it is understandable that the sinter structure will also be complex, being formed mainly by grains of iron Sinters experience a strong increase in porosity after ...

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Iron Ore Testing Apparartus - Salvin Instruments

Determination of Softening Melting Characteristic of Iron ore lumps/ Pellets/Sinter; Application : Iron Ore, Lumps, Sinter and Pellet ; RI/RDI Test Apparatus . View Project. RI/RDI Test Apparatus . Standard : IS – 8167:1989, 10823 ISO: 4696 ; Determination of Reducibility index/low temperature reduction disintegration index by static method ; Application : Iron Oxide , Lump Ores, Sinters ...

Free Chat

Characterisation of the Physical and Metallurgical ...

Table 3 shows some of the characteristic requirements on natural iron ore lump, pellets and sinters, to serve as a feed material to the main iron production processes. The characteristics of Muko iron ores from the different deposits are also given in this table. It follows from Table 3 that the iron ores Ug1–Ug5 meet the chemical requirements as natural materials for the BF (Routes 1 and 4 ...

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