reduction behaviour of iron ore pellets

REDUCTION BEHAVIOUR OF IRON ORE PELLETS

made to study the reduction behavior and kinetics of iron ore fired pellets. The effect of different reduction parameters such as temperature (850-1000ºC), time (15-120 minutes.), mixing of particles of different sizes at different ratios for pellet preparation etc. on the reduction behavior of iron ore pellets.

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(PDF) Reduction Behaviour of iron Ore Pellets with ...

The paper analyses the non-isothermal kinetics data and discusses the mechanism of iron ore - coal composite pellets reduction. Activation energy values obtained for final stage reduction, vary ...

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REDUCTION BEHAVIOUR OF FIRED IRON ORE PELLETS

The present project work on- “Reduction Behaviour of Fired Iron Ore Pellets” was undertaken with a vision to promote the effective utilization of iron ore and coal fines in sponge iron making. Presently, India has become the world leader in sponge iron production and the production of steel by DR-EAF route is increasing day by day.

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Reduction Behaviour of Iron Ore Fluxed Pellets under Load ...

reduction behaviour of acidic and basic fluxed iron ore pel-lets. The reduction was carried out isothermally at 1023– 1273K with reformed natural gas mixture. The influences of load values, temperature and basicity were investigated and correlated. In previous publication,18) the reduction ki-netics and mechanism under load was discussed. 2.

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Studies on reduction behaviour of highly fluxed iron ore ...

Dec 24, 2020  The reduction behaviour of high flux (basicity 2, 4, 6 8) hardened iron ore pellets, reduced at temperature (900–1050 °C) were examined and reported here. Result showed temperature and basicity both influenced the reduction behaviour of iron ore pellets.

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Reduction swelling behaviour of iron ore pellets

• The dynamic swelling of iron ore pellets in a simulated blast furnace atmosphere is considerably more restrained than the corresponding static swelling. Thus, the reduction swelling behaviour of iron ore pellets should preferably be studied DYNAMICALLY under simulated blast furnace conditions to obtain the most realistic results.

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TO STUDY THE REDUCTION SWELLING BEHAVIOUR OF

2.5 Industrial significance- 12 2.6 Mechanism of swelling- 12-13 2.7 Thermodynamics and kinetics of iron ore reduction- 13-15 Chapter 3 16-20 3. Experimental 16-20 3.1 Material Selection- 17-18 3.2 Experimental Procedure- 18-19 3.3 Determination of degree of reduction of Iron-ore pellets- 19 3.4 Determination of degree of 19swelling- -20 3.5 Determination of Drop Number- 20

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REDUCTION AND SWELLING BEHAVIOUR OF FIRED IRON ORE

Hematite Iron Ore pellets fired at 13000C and reduced in coal (-4+6 mesh 0size) at a temperature of 950 C and 10000C 10 Degree of Reduction vs. Swelling Plots for the reduction of fired Sakaruddin 29 Hematite Iron Ore pellets fired at 13000C and reduced in coal (

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Effect of particle size on reduction behavior in iron ore ...

reduction behavior has been studied little. Due to the importance of iron making in the current and future technologies, the reduction of iron ore-coal composite pellets is probably one of the most studying topics. The objective of the present investigation is to study the reduction characteristics of iron ore-coal composite pellets.

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CHARACTERIZATION OF PROPERTIES AND REDUCTION

3.2 Reduction Behaviour of Iron Ores The degree of reduction values of these iron ore lumps and fired pellets, reduced at 900°C for different time periods in the range 30 —120 minutes under rapid and slow heating conditions, have been summarized in Tables 3 and 4. Reduction studies of

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Reduction Behavior of Iron Ore Pellets with Simulated Coke ...

Apr 17, 2013  In this study, iron ore pellets were isothermally reduced with simulated original and reformed coke oven gas (RCOG) at 700–980°C. The results were compared with those obtained by the reduction of pellets with the original and reformed natural gas (RNG).

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(PDF) Reduction Behaviour of iron Ore Pellets with ...

The paper analyses the non-isothermal kinetics data and discusses the mechanism of iron ore - coal composite pellets reduction. Activation energy values obtained for final stage reduction, vary ...

More

Reduction Behaviour of Iron Ore Fluxed Pellets under Load ...

reduction behaviour of acidic and basic fluxed iron ore pel-lets. The reduction was carried out isothermally at 1023– 1273K with reformed natural gas mixture. The influences of load values, temperature and basicity were investigated and correlated. In previous publication,18) the reduction ki-netics and mechanism under load was discussed. 2.

More

Reduction swelling behaviour of iron ore pellets

• The dynamic swelling of iron ore pellets in a simulated blast furnace atmosphere is considerably more restrained than the corresponding static swelling. Thus, the reduction swelling behaviour of iron ore pellets should preferably be studied DYNAMICALLY under simulated blast furnace conditions to obtain the most realistic results.

More

Reduction Behaviour of Iron Ore Pellets - ethesis

In the present project work, an attempt has been made to study the reduction behavior and kinetics of iron ore fired pellets. The effect of different reduction parameters such as temperature (850-1000ºC), time (15-120 minutes.), mixing of particles of different sizes at different ratios for pellet preparation etc. on the reduction behavior of ...

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Reduction Behavior and Kinetics of Iron Ore Pellets under ...

reformed natural gas. Costa et al.13) studied reduction of iron ore by pure hydrogen using small haematite cubes shaped from industrial pellets. Results showed that the use of pure hydrogen with small molecular diameter accelerated the Reduction Behavior and Kinetics of Iron Ore Pellets

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(PDF) Reduction Behaviour of Olivine Iron Ore Pellets in ...

An experimental study was conducted to determine the reduction behaviour of olivine iron ore pellets and associated reduction mechanisms in the experimental blast furnace (EBF) located at Luleå.

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Effect of particle size on reduction behavior in iron ore ...

reduction behavior has been studied little. Due to the importance of iron making in the current and future technologies, the reduction of iron ore-coal composite pellets is probably one of the most studying topics. The objective of the present investigation is to study the reduction characteristics of iron ore-coal composite pellets.

More

CHARACTERIZATION OF PROPERTIES AND REDUCTION

3.2 Reduction Behaviour of Iron Ores The degree of reduction values of these iron ore lumps and fired pellets, reduced at 900°C for different time periods in the range 30 —120 minutes under rapid and slow heating conditions, have been summarized in Tables 3 and 4. Reduction studies of

More

Characterization of the burden behaviour of iron ore ...

Characterization of the burden behaviour of iron ore pellets mixed with nut coke under simulated blast furnace conditions Dharm Jeet Gavel a, Qingshi Songb, Allert Ademac, Jan van der Stelc, Jilt Sietsmaa, Rob Boom a and Yongxiang Yang a aDepartment of Materials Science and Engineering, Delft University of Technology, Delft, Netherlands; bResearch Institute, Baoshan Iron and Steel

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Effect of Basicity on the Reduction Behavior of Iron Ore ...

Mar 22, 2018  Physicochemical properties of the iron ore pellets depend on the iron oxide concentrate, gangue content and the amount of fluxes added. The objective of this present work is to study the reducibility as well as the softening–melting behavior of the iron ore bearing fines (mainly containing hematite) pellet with lime to silica ratio (C/S) varying from 0.9 to 2.4 in the temperature range of ...

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Effect of Mineralogy on Reduction Behaviour of Iron Ore ...

The present study deals with impact of gangue amount (Al2O3, SiO2) in iron ores on reduction of its pellets for production of sponge iron. Iron ore pellets were reduced isothermally with noncoking coal fines in the range of 1123 - 1273 K with a time interval of 15, 30,45,60,90 and 120 min. As the temperature rose from 1123 to 1223 K, the reducibility index of iron ore pellets increased and ...

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Tumbler Index - Study of Reduction Behaviour Of Iron Ore Lumps

The Tumbler Index is a relative measure of the resistance of the material to breakage or degradation by impact. (ii) Abrasion Index: It is a relative measure the degradation of iron ore by abrasion. The Tumbler Index and Aibrasion Index are determined in a tumbler test apparatus as per the Bureau of Indian Standard No. 6495

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

Mar 23, 2020  This research work focuses on the reduction behavior of iron ore pellets, sinter, and lump ore in simulated BF shaft conditions where H 2 and H 2 O are present in typical CO CO 2 N 2 atmospheres. 2 Experimental Section. Sinter, lump ore, and iron ore pellets were used in experiments. The composition for all three materials is shown in Table 1.

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(PDF) Reduction Behaviour of iron Ore Pellets with ...

The paper analyses the non-isothermal kinetics data and discusses the mechanism of iron ore - coal composite pellets reduction. Activation energy values obtained for final stage reduction, vary ...

More

Reduction Behaviour of Iron Ore Pellets - ethesis

In the present project work, an attempt has been made to study the reduction behavior and kinetics of iron ore fired pellets. The effect of different reduction parameters such as temperature (850-1000ºC), time (15-120 minutes.), mixing of particles of different sizes at different ratios for pellet preparation etc. on the reduction behavior of ...

More

(PDF) Reduction Behaviour of Olivine Iron Ore Pellets in ...

An experimental study was conducted to determine the reduction behaviour of olivine iron ore pellets and associated reduction mechanisms in the experimental blast furnace (EBF) located at Luleå.

More

Reduction Behavior and Kinetics of Iron Ore Pellets under ...

reformed natural gas. Costa et al.13) studied reduction of iron ore by pure hydrogen using small haematite cubes shaped from industrial pellets. Results showed that the use of pure hydrogen with small molecular diameter accelerated the Reduction Behavior and Kinetics of Iron Ore Pellets

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Reduction Behavior of Low Grade Iron Ore at Reducing ...

Reduction behavior of iron ore pellets with simulated coke oven gas and natural gas was investigated by many researchers 4-6. The highest reduction degree was obtained for the pellets reduced with reformed coke oven gas while the lowest reduction degree was exhibited by original natural gas. On the other hand, the rate of reduction with ...

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CHARACTERIZATION OF PROPERTIES AND REDUCTION

3.2 Reduction Behaviour of Iron Ores The degree of reduction values of these iron ore lumps and fired pellets, reduced at 900°C for different time periods in the range 30 —120 minutes under rapid and slow heating conditions, have been summarized in Tables 3 and 4. Reduction studies of

More

Effect of Mineralogy on Reduction Behaviour of Iron Ore ...

The present study deals with impact of gangue amount (Al2O3, SiO2) in iron ores on reduction of its pellets for production of sponge iron. Iron ore pellets were reduced isothermally with noncoking coal fines in the range of 1123 - 1273 K with a time interval of 15, 30,45,60,90 and 120 min. As the temperature rose from 1123 to 1223 K, the reducibility index of iron ore pellets increased and ...

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Fundamental Studies Related to Gaseous Reduction of

of reduction behaviour of different iron ore pellets, such as rate and mechanism of reduction. Despite the extensive researches performed in this field, further investigations are needed to meet the demands of the ongoing advancements in this industry.

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Tumbler Index - Study of Reduction Behaviour Of Iron Ore Lumps

The Tumbler Index is a relative measure of the resistance of the material to breakage or degradation by impact. (ii) Abrasion Index: It is a relative measure the degradation of iron ore by abrasion. The Tumbler Index and Aibrasion Index are determined in a tumbler test apparatus as per the Bureau of Indian Standard No. 6495

More

Characterization of the burden behaviour of iron ore ...

Characterization of the burden behaviour of iron ore pellets mixed with nut coke under simulated blast furnace conditions Dharm Jeet Gavel a, Qingshi Songb, Allert Ademac, Jan van der Stelc, Jilt Sietsmaa, Rob Boom a and Yongxiang Yang a aDepartment of Materials Science and Engineering, Delft University of Technology, Delft, Netherlands; bResearch Institute, Baoshan Iron and Steel

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

ing reduction behavior of all charge materials or just part of them.[3–9] 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

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Reduction Behaviour of Iron Ore Pellets - CORE Reader

Reduction Behaviour of Iron Ore Pellets - CORE Reader

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Amenability of Reduced Iron Ore Pellets to Mechanical ...

reduction of the iron ore pellets, respectively. Upon comple-tion of each test, samples were placed in inert atmosphere prior to further testing. 2.2. Sample Testing With the aim of analyzing the mechanical response of the iron ore pellets during reduction, hardness measure-ments were conducted in a microhardness tester (HM220,

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(PDF) Smelting Reduction of Iron Ore-Coal Composite Pellets

The objective of the studies by the authors [36] was to investigate the reduction kinetics and dissolution behavior of iron ore-coal composite pellets in liquid metal bath in an induction furnace. ...

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