Email Adddress: [email protected]

composite iron ore reduction

composite iron ore reduction

Direct reduction of iron ore/biomass composite

2017-11-1  In contrast, no distinct boundary between the reduced and unreduced portions in the iron ore/biomass composite pellet (Fig. 3b). While, for the control pellet, there was existed an evident boundary. As the iron ore was gradually reduced from high valence to low valence from 5 min to 20 min (Fig. 3e, f), greater silvery portion was observed. When a certain degree of reduction was achieved, the porously reduced

Get Price

Reduction Behavior of Carbon Composite Iron Ore Hot ...

Reduction of carbon composite iron ore hot briquette takes place by heating only, and is assumed to provide excellent reduction performance, but no report has been yet made on reducing and melting behaviors of carbon composite iron ore hot briquette of by heating in shaft furnace. In this research, reducing and melting behavior of carbon

Get Price

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

2021-3-19  The reduction of iron ore-coal composite pellets was carried out in the temperature range of 500 ~1200°C by thermogravimetry. This study aims to investigate the effect of particle size of iron ore on reduction behavior. Three samples of different particle size were selected: 25

Get Price

The Reduction of Composite Iron Ore-Coal Pellets to

2014-6-18  THE REDUCTION OF COMPOSITE IRON ORE-COAL PELLETS TO LI QUID IRON by CLItORD JOHN ADAMS, B.Sc., M.Sc. '" ''c; t I I A Thesis Submitted to the School of Graduate Studies in Partial Fulfilment of the Requirements, t for the Degree Doctor of Philosophy McMaster University April 1978 ® CLIFFORD JOHN ADAMS 1978 /

Get Price

Modelling the reduction of an iron ore-coal composite ...

2005-7-1  Keywords--Control volume, Iron ore direct reduction, Composite pellet, Axisymmetric heat transfer. 1. INTRODUCTION Some coal-based iron ore direct reduction processes are based on formation of composite pellets which consist of a mixture of fines of iron-bearing oxide, carbonaceous material, for example, coal, coke, or char and a small amount ...

Get Price

Reduction Efficiency of Iron Ore–Coal Composite

2015-2-13  Reduction of iron ore coal composite pellets in tunnel kiln emerges with an edge over all other systems studied. Performance parameters like percentage metallic iron formed, percentage metallization, reduction efficiency, carbon utilization efficiency, energy efficiency have been calculated and found to be significantly higher for composite pellets than the other systems studied.

Get Price

Kinetics and mechanisms of direct reduction of iron

2015-4-20  To improve the reduction efficiency, Luo et al. studied the possibility of introducing bio-gas produced from catalytic gasification of biomass into the direct reduction ironmaking as reducing agent. Instead of coke, biomass was mixed together with iron ore powder, water, limestone and bentonite to produce composite pellets.

Get Price

Preparation of core-shell iron ore-biochar composite ...

2018-10-1  Two types of iron concentrates, A and B, were used for the preparation and microwave reduction of iron ore-biochar composite pellets. Their main chemical compositions are shown in Table 1 . Iron concentrate A was a major raw material with high iron grade (67.61%) and low hazardous elements, such as K, S and P, meeting the chemical composition requirements for DRI.

Get Price

Lowering Reduction Temperature of Iron Ore and Carbon ...

composite gave no peak, because formed metallic iron could act as a catalyst for the gasi・ation of carbon. These results indicate that the reduction of ores

Get Price

The Reduction of Composite Iron Ore-Coal Pellets to

2014-6-18  THE REDUCTION OF COMPOSITE IRON ORE-COAL PELLETS TO LI QUID IRON by CLItORD JOHN ADAMS, B.Sc., M.Sc. '" ''c; t I I A Thesis Submitted to the School of Graduate Studies in Partial Fulfilment of the Requirements, t for the Degree Doctor of Philosophy McMaster University April 1978 ® CLIFFORD JOHN ADAMS 1978 /

Get Price

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

2021-3-19  The reduction of iron ore-coal composite pellets was carried out in the temperature range of 500 ~1200°C by thermogravimetry. This study aims to investigate the effect of particle size of iron ore on reduction behavior. Three samples of different particle size were selected: 25 ~48 µm, 75 ~106 µm and 150 ~180 µm. The reaction kinetic

Get Price

A study of kinetics and mechanisms of iron ore

1996-12-31  @article{osti_460673, title = {A study of kinetics and mechanisms of iron ore reduction in ore/coal composites}, author = {Sun, S and Lu, W K}, abstractNote = {Blast furnace ironmaking technology, by far the most important ironmaking process, is based on coke and iron ore pellets (or sinter) to produce liquid iron. However, there has been a worldwide effort searching for a more

Get Price

RAPID REDUCTION OF NANO-SIZE IRON ORE PARTICLES

2020-4-22  ustainability, CO2 reduction, Iron ore/Carbon composite, Nano materials for iron making * RAPID REDUCTION OF NANO-SIZE IRON ORE PARTICLES IN AN IRON ORE/CARBON COMPOSITE . Kouichi Miura *, Masato Kawanari and Ryuichi Ashida . Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan . Summary

Get Price

Preparation of core-shell iron ore-biochar composite ...

2018-10-1  Two types of iron concentrates, A and B, were used for the preparation and microwave reduction of iron ore-biochar composite pellets. Their main chemical compositions are shown in Table 1.Iron concentrate A was a major raw material with high iron grade (67.61%) and low hazardous elements, such as K, S and P, meeting the chemical composition requirements for DRI.

Get Price

Study of nonisothermal reduction of iron ore

Cold-bonded composite pellets, consisting of iron ore fines and fines of noncoking coal or char, were prepared by steam curing at high pressure in an autoclave employing inorganic binders. Dry compressive strength ranged from 200 to 1000 N for different pellets. The pellets were heated from room temperature to 1273 K under flowing argon at two heating rates.

Get Price

Kinetic Studies of Iron Ore–Coal Composite Pellet ...

2011-12-1  An attempt has been made to study the effect of coal quality on the reduction kinetics of iron ore–coal composite pellets under non-isothermal condition in inert atmosphere. During non-isothermal reduction of composite pellets, it is observed that (i) reduction rate of iron oxide increases with increasing temperature, (ii) reduction rate increases with increase in porosity of pellets and ...

Get Price

Reduction of low grade iron ore pellet using palm

2014-3-1  Palm kernel shell (PKS) waste serves as energy and source of CO and H 2 for iron ore reduction process. PKS content and reduction temperature significantly influenced the reduction rate of PKS–iron ore composite pellet. Iron oxide in iron ore–30 mass% PKS composite pellet can be transformed into magnetite and partially to wustite at 900 °C.

Get Price

Mechanism of Carbothermic Reduction of Hematite in ...

tained in a rotary hearth furnace. The carbon composite iron ore hot briquette was developed for being used in the shaft furnace.4) Reduction degree reached 95% in about 10min during the briquette descending to the bottom of heat reserve zone of 1373K. Therefore, Utilization of the carbon composite iron ore hot briquette was promising to

Get Price

Iron ore–coal composite pellets/briquettes as new

2017-3-3  Dutta SK, Sah R, Chokshi Y. Iron Ore – Coal / Coke Composite Pellets. Germany: Lambert Academic Publishing; 2013. Dutta S.K, Ghosh A. Study of Non–isothermal Reduction of Iron Ore–Coal/Char Composite Pellets. Metall Mat Trans. 1994;25(1):15–26. Sah R, Dutta SK. Iron ore–coal composite pellets preparation and their smelting kinetics.

Get Price

A study of kinetics and mechanisms of iron ore

1996-12-31  @article{osti_460673, title = {A study of kinetics and mechanisms of iron ore reduction in ore/coal composites}, author = {Sun, S and Lu, W K}, abstractNote = {Blast furnace ironmaking technology, by far the most important ironmaking process, is based on coke and iron ore pellets (or sinter) to produce liquid iron. However, there has been a worldwide effort searching for a more

Get Price

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

2021-3-19  The reduction of iron ore-coal composite pellets was carried out in the temperature range of 500 ~1200°C by thermogravimetry. This study aims to investigate the effect of particle size of iron ore on reduction behavior. Three samples of different particle size were selected: 25 ~48 µm, 75 ~106 µm and 150 ~180 µm. The reaction kinetic

Get Price

RAPID REDUCTION OF NANO-SIZE IRON ORE PARTICLES

2020-4-22  ustainability, CO2 reduction, Iron ore/Carbon composite, Nano materials for iron making * RAPID REDUCTION OF NANO-SIZE IRON ORE PARTICLES IN AN IRON ORE/CARBON COMPOSITE . Kouichi Miura *, Masato Kawanari and Ryuichi Ashida . Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan . Summary

Get Price

Modelling the reduction of an iron ore-coal composite ...

Home Browse by Title Periodicals Mathematical and Computer Modelling: An International Journal Vol. 42, No. 1-2 Modelling the reduction of an iron ore-coal composite pellet with conduction and convection in an axisymmetric temperature field

Get Price

Effect of CaO on the reduction behaviour of iron

2017-1-26  The effect of CaO on the reduction behaviour of iron ore–coal composite pellets has been studied in a laboratory scale multi-layer bed rotary hearth furnace at 1250°C for 20 min. Reduced pellets have been characterised through weight loss, porosity measurement, phase analysis by XRD, and morphology study by SEM.

Get Price

Reaction model and reaction behavior of carbon

2021-1-2  Reduction behavior of carbon composite iron ore hot briquette in shaft furnace and scope on blast furnace performance reinforcement ISIJ Int. , 43 ( 2003 ) , pp. 1904 - 1912 CrossRef View Record in Scopus Google Scholar

Get Price

Use of iron ore fines in cold-bonded self-reducing ...

2019-11-12  The feasibility of producing Direct Reduced Iron from cold-bonded self-reducing composite pellets made from Anglo American Kumba Iron Ore Sishen upgraded slimes was considered on laboratory scale. Composite pellets were made by mixing Sishen upgraded slimes, coke and different binders using a pelletizing disc by addition of moisture.

Get Price

Reduction of Iron-Oxide-Carbon Composites: Part I ...

A new ironmaking concept using iron-oxide-carbon composite pellets has been proposed, which involves the combination of a rotary hearth furnace (RHF) and an iron bath smelter. This part of the research focuses on studying the two primary chemical kinetic steps. Efforts have been made to experimentally measure the kinetics of the carbon gasification by CO2 and wüstite reduction by CO by ...

Get Price

Sticking mechanism of low grade iron ore-coal composite in ...

2018-8-22  Sticking mechanism of low grade iron ore-coal composite in rotary kiln Powder Technology ( IF 4.142) Pub Date : 2018-08-22, DOI: 10.1016/j.powtec.2018.08.054 Ronghai Zhong,Lingyun Yi,Zhucheng Huang,Xuehua Shen,Tao Jiang

Get Price

Iron ore–coal composite pellets/briquettes as new

2017-3-3  Dutta SK, Sah R, Chokshi Y. Iron Ore – Coal / Coke Composite Pellets. Germany: Lambert Academic Publishing; 2013. Dutta S.K, Ghosh A. Study of Non–isothermal Reduction of Iron Ore–Coal/Char Composite Pellets. Metall Mat Trans. 1994;25(1):15–26. Sah R, Dutta SK. Iron ore–coal composite pellets preparation and their smelting kinetics.

Get Price

A study of kinetics and mechanisms of iron ore

1996-12-31  @article{osti_460673, title = {A study of kinetics and mechanisms of iron ore reduction in ore/coal composites}, author = {Sun, S and Lu, W K}, abstractNote = {Blast furnace ironmaking technology, by far the most important ironmaking process, is based on coke and iron ore pellets (or sinter) to produce liquid iron. However, there has been a worldwide effort searching for a more

Get Price

Smelting Reduction of Iron Ore‐Coal Composite

2010-6-15  Smelting reduction of iron ore‐coal composite pellets has been carried out in an induction furnace. The pellets, tied with tungsten wire, were immersed into the liquid metal bath. The experiments were carried out in the temperature range of 1713 K to 1733 K.

Get Price

Kinetics of Reduction of Composite Pellets Containing

2013-7-18  The effects of temperature, pellet type, inert and reactive gas flowrate, and external atmosphere on the reduction rates of composite pellets containing iron ore and coal or coke were investigated in the temperature range 900–1200°C. Two different pellets were

Get Price

Recovering Iron from Iron Ore Tailings and Preparing ...

2019-4-16  direct reduction and magnetic separation, whereas slag-tailing concrete composite admixtures were subsequently prepared using the high-silicon residues separated from IOTs. 2. Materials and Methods 2.1. Raw Materials 2.1.1. Iron Ore Tailings IOTs were sampled from a storage dam at the Qidashan iron ore dressing plant in Anshan, which

Get Price

Reduction of Iron-Oxide-Carbon Composites: Part I ...

A new ironmaking concept using iron-oxide-carbon composite pellets has been proposed, which involves the combination of a rotary hearth furnace (RHF) and an iron bath smelter. This part of the research focuses on studying the two primary chemical kinetic steps. Efforts have been made to experimentally measure the kinetics of the carbon gasification by CO2 and wüstite reduction by CO by ...

Get Price

Sticking mechanism of low grade iron ore-coal composite in ...

2018-8-22  Sticking mechanism of low grade iron ore-coal composite in rotary kiln Powder Technology ( IF 4.142) Pub Date : 2018-08-22, DOI: 10.1016/j.powtec.2018.08.054 Ronghai Zhong,Lingyun Yi,Zhucheng Huang,Xuehua Shen,Tao Jiang

Get Price

Fundamental Study on Carbon Composite Iron Ore

2011-3-21  Carbon composite iron ore hot briquette (CCB) is the product of fine iron ore and fine coal by hot briquetting process, which attracts more and more attention as a new type of ironmaking raw materials aiming to improve the operation efficiency and reduce the coke consumption of blast furnace.

Get Price

Reduction Behavior of Low Grade Iron Ore at

1.1 Reduction of iron ores. Many studies were carried out for investigation of reduction behavior of different iron ores by carbon and different reducing gases all over the world 1-9.Studies on the chemical and physical properties and the reduction behavior in coal of hematite iron ores are investigated 2.. Baharia iron ore samples were isothermally reduced with a CO-CO 2 gas mixture at 600 ...

Get Price

Kinetics of Reduction of Iron Oxides and Ores by

Theoretical considerations and experimental findings point out that reduction of iron Oxides and Ores by Carbon proceed via the gas phase, whenever the later is present. The overall reaction is a coupling of the following two component reactions. viz. Gasification of carbon C(S) CO2 (g) = 2C0 (g) Reduction of iron oxide mFe.0y(S) -f- CO (g) = nFezOw [S) CO2 (g) Recent kinetic studies have ...

Get Price

Separation of iron-nickel alloy nugget from limonitic ...

2018-12-27  reduction of coal composite limonitic laterite ore briquette was investigated. In this investigation, in order to decrease the separation temperature of iron-nickel alloy nugget, the selective reduction by control of C/O ratio was introduced and reductant added in the briquette was inadequate for the reduction of nickel and iron. Nickel was ...

Get Price