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microwaves reductio iron ore pellets

2020-04-20T19:04:39+00:00
  • Microwaves Applied to Carbothermic Reduction of Iron Ore ...

    2016-05-09  Abstract Results of reduction tests conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as the reducing agent with a conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume.

  • Cited by: 12
  • Preparation of core-shell iron ore-biochar composite ...

    2018-10-01  This study offers a new method to produce qualified metallized pellets for steelmaking after microwave-assisted self-reduction of iron ore-biochar composite pellets. The key point was to prepare green composite pellets with good quality indexes which also allowed sufficient self-reduction under microwave irradiation.

  • Cited by: 9
  • Microwaves Applied to Carbothermic Reduction of Iron Ore ...

    Abstract Results of reduction tests conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as the reducing agent with a...

  • Influence of microwave heating on the microstructures of ...

    2016-06-14  A comparison of the iron ore oxidised pellets with coal (out-proportioning) by conventional heating and microwave heating was carried out in this paper. Microstructure transformations during reduction process were investigated by optical microscopy and scanning electron microscope with energy dispersive spectrometry analysis.

  • Cited by: 8
  • MICROWAVES APPLIED TO CARBOTHERMIC REDUCTION OF IRON

    MICROWAVES APPLIED TO CARBOTHERMIC REDUCTION OF IRON ORE PELLETS

  • Effect of microwave heat hardening on microstructure and ...

    2020-01-01  At 600 °C conventional heating and microwave heating having 10% and 15% reduction due to this dispersive fine magnetite phases occur and metallic iron start to give strength to the pellets as shown Fig. 3 (a). As prolonged heating reduction rate increase, magnetite reduced to FeO when 60% reduction attained at 800 °C as shown in Fig. 3 (b).

  • Cited by: 1
  • MICROWAVES APPLIED TO CARBOTHERMIC REDUCTION OF IRON

    Results of reducibility tests of reduction conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as reducing agent with conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume.

  • Cited by: 12
  • Novel Drying Process Assisted by Microwave to Iron Ore ...

    In the case of iron ore pellets, Athayde et al. (2018)13explained that moisture plays an important role as an better absorber of microwave and convert the energy into heat. Despite of other carbon based materials, coal is a poor absorber.

  • Pellets for Direct Reduction

    Properties and Quality DemandsMetallurgical Test MethodsLKAB Pellets For Direct ReductionLKAB have concentrated on developing and marketing grades of pellets that are principally suited to the Midrex-Purofer- HyL group of processes. In the following we shall discuss pellets for these processes only. Since no melting takes place during reduction, the gangue remains behind in the reduced pellets. It is therefore essential that the input material contains only a small amount of gangue, since the gangue then has to be melted in the steel furnace, resulting in extra energy consumption and costs. Still, a cert
  • OrePro - Microwave Iron Pellet Technology

    Our process is unique in that it uses microwave energy as the sole heat source for drying, preheating and induration (oxidizing and hardening) of ‘green magnetite’ iron ore pellets. The major advantages of using microwaves for magnetite processing are rapid heat transfer, volumetric and... > About Ore Pro Technology

  • Effect of microwave heat hardening on microstructure and ...

    2020-01-01  While in microwave heating the reduction degree attained 89% when pellets were at 800 °C, within the duration of 60 min. At temperature 600 °C, degree of reduction is nearly same but after some time it changed. Download : Download high-res image (89KB) Download : Download full-size image; Fig. 1. Degree of reduction of pellet.

  • Carbothermal Reduction of Iron Ore Applying Microwave ...

    Magnetite iron ore-coal composite pellets were microwave irradiated in N-2, atmosphere with a power supply gradually increased in 2 min intervals from 0.2 up to 2kW at 2.45GHz. Electron probe ...

  • Reduction of iron ore with coal by microwave heating ...

    Microwave heating of iron ore was investigated as an alternative to conventional reduction processes to solve the problem of slow heat transfer. Microwave heating and reduction tests were run on composite green balls made from coal and magnetite concentrate. Bench-scale tests were run on both powdered and pelletized feeds using a 15 kW microwave generator. A significant increase in the ...

  • Microwaves Applied to Carbothermic Reduction of Iron Ore ...

    Results of reduction tests conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as the reducing agent with a conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume. Ore used in this work is called “Alzada” which has well known ...

  • MICROWAVES APPLIED TO CARBOTHERMIC REDUCTION OF IRON ORE

    Results of reducibility tests of reduction conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as reducing agent with conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume. Ore used in this work is called quot;Alzada quot; which has ...

  • Direct reduction of carburized pre-reduced pellets by ...

    A new iron-making process using carburized pre-reduced iron ore pellets and microwave heating is investigated. The pre-reduced pellets, with a porous structure, and fine particles are carburized homogeneously at 400–650 °C in a CO atmosphere. The carburized carbon not only acts reaction as a reduction agent, but also absorbs microwave in the reduction process. Hence, the carburized pre ...

  • Localized Heating and Reduction of Magnetite Ore with Coal ...

    Magnetite iron ore-coal composite pellets were microwave irradiated in N ... in the reduction of iron ore by coal under gradually in-creased microwave irradiation was investigated and com-pared with reported results of direct reduction using radia-tion heating. 2. Experimental 2.1. Sample Preparation Spherical composite pellets with about 20mm diameter were prepared using a pelletizer from a ...

  • OrePro - Microwave Iron Pellet Technology

    The Benefits of Ore Pro Technology. The unique features of Ore Pro's Technology provide significant advantages over conventional pellet processing plants, such as: Environmentally friendly - independent emission monitoring of the demonstration plant has recorded very low levels of NOx , SO x and CO 2 during normal operation ; Reduced CAPEX and reduced OPEX compared to conventional gas / fuel ...

  • Our Products - Iron Ore Company of Canada

    We target niche, high value segments of the seaborne iron ore market, including high-grade, low-impurity fines, premium blast furnace pellets and premium direct reduction pellets. These products, within the broader iron ore market, have seen a significant and sustained increase in demand from both blast furnaces and electric arc furnace steel producers. This is because our high-grade, low ...

  • OrePro - Microwave Iron Pellet Technology

    Our process is unique in that it uses microwave energy as the sole heat source for drying, preheating and induration (oxidizing and hardening) of ‘green magnetite’ iron ore pellets. The major advantages of using microwaves for magnetite processing are rapid heat transfer, volumetric and ... > About Ore Pro Technology . The company believes it can offer the industry a unique opportunity to ...

  • Reduction of iron ore with coal by microwave heating ...

    Microwave heating of iron ore was investigated as an alternative to conventional reduction processes to solve the problem of slow heat transfer. Microwave heating and reduction tests were run on composite green balls made from coal and magnetite concentrate. Bench-scale tests were run on both powdered and pelletized feeds using a 15 kW microwave generator. A significant increase in the ...

  • Microwaves Applied to Carbothermic Reduction of Iron Ore ...

    Results of reduction tests conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as the reducing agent with a conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume. Ore used in this work is called “Alzada” which has well known ...

  • Direct reduction of carburized pre-reduced pellets by ...

    A new iron-making process using carburized pre-reduced iron ore pellets and microwave heating is investigated. The pre-reduced pellets, with a porous structure, and fine particles are carburized homogeneously at 400–650 °C in a CO atmosphere. The carburized carbon not only acts reaction as a reduction agent, but also absorbs microwave in the reduction process. Hence, the carburized pre ...

  • MICROWAVES APPLIED TO CARBOTHERMIC REDUCTION OF IRON ORE

    Results of reducibility tests of reduction conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as reducing agent with conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume. Ore used in this work is called quot;Alzada quot; which has ...

  • Localized Heating and Reduction of Magnetite Ore with Coal ...

    Magnetite iron ore-coal composite pellets were microwave irradiated in N ... in the reduction of iron ore by coal under gradually in-creased microwave irradiation was investigated and com-pared with reported results of direct reduction using radia-tion heating. 2. Experimental 2.1. Sample Preparation Spherical composite pellets with about 20mm diameter were prepared using a pelletizer from a ...

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

    iron ore with particle size 25 ~48 µm was appropriate for the reduction of iron ore-coal composite pellets in the experimental conditions, and particle size 75 ~106 µm and 150 ~180 µm were insufficient to complete the reduction. With the increase of particle size, the activation energy increased from 53.04kJ/mol to 131.72kJ/mol. Particle size 25 ~48 µm had the faster reduction ...

  • Carbothermal Reduction of Iron Ore Applying Microwave ...

    We used a microwave generator of 2.45 GHz with variable power up to 3000 W. Self‐reducing pellets under argon atmosphere, containing iron ore and petroleum coke, with 3.5 g of mass and 15 mm of diameter were declined. We obtained the kinetic curves of reduction of iron ore and of energy consumption to the process in the maximum electric field, in the maximum magnetic field and at

  • CHARACTERIZATION OF PROPERTIES AND REDUCTION

    For all the fired iron ore pellets, the degree of reduction in coal was more intense in the first 30 minutes after which it became small. Slow heating led to higher degree of reduction in fired pellets than rapid heating. All the iron ores exhibited more than 90% reduction in their fired pellets in 2 hrs. time interval at a temperature of 9000C. Iron ore lumps showed lower degree of reduction ...

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

    Pellets for metallisation made from an upgraded concentrate have at least 66% Fe and are used primarily to produce direct reduction iron (DRI, HBI). Iron ore pellets are produced from the iron ore concentrate by pelletizing and sintering and are used as the feedstock for the blast furnace process.

  • DRI production International Iron Metallics Association

    Direct reduction of iron is the removal of oxygen from iron ore or other iron bearing materials in the solid state, i.e. without melting, as in the blast furnace. The reducing agents are carbon monoxide and hydrogen, coming from reformed natural gas, syngas or coal. Iron ore is used mostly in pellet and/or lumpy form. The chemical reactions involved in the direct reduction of iron are the ...

  • Microwaves Applied to Carbothermic Reduction of Iron Ore ...

    Results of reduction tests conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as the reducing agent with a conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume. Ore used in this work is called “Alzada” which has well known ...

  • MICROWAVES APPLIED TO CARBOTHERMIC REDUCTION OF IRON ORE

    Results of reducibility tests of reduction conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as reducing agent with conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume. Ore used in this work is called quot;Alzada quot; which has ...

  • Study of Reduction kinetics of Iron ore Pellets by ...

    Table 4.6-4.23 Reduction iron ore pellets with Noncoking coals Table 4.24-26 Estimated Activation Energy of Iron Ore Pellets Table 4.27 XRD analysis of reduced Iron ore pellets Table 4.28 Comparison of Degree of Reduction: Pellet Vs Lump. 1 1. INTRODUCTION DRI or Sponge Iron is a porous solid-state product of direct reduction process, which is produced either in lump or ...

  • Iron Ore Pellets: North America, BF and DR Grade, Supply ...

    Iron Ore Pellets: North America, BF and DR Grade, Supply and Quality Dr. Joseph J. Poveromo Raw Materials Ironmaking Global Consulting Bethlehem, PA [email protected] 3rd COREM Symposium on Iron Ore Pelletizing Sept. 29 – Oct. 2, 2013 Quebec City . BF Grade Pellet Supply NAFTA . NAFTA Blast Furnace Pellet Balance 2012 Compamy Pellet Equity Cliffs IOC

  • DIRECT FROM - Midrex

    lets for their iron ore supply. Prices of oxide pellets, iron, and steel have varied over a broad range, putting a strain on profitability. At times, the operating expenses of some ironmakers have exceeded the sale price of their product, forcing curtailment of operation until the situation improved. While other times, the business climate was more favorable. In short, economic forces driving ...

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

    THE USE OF IRON ORE FINES IN COLD-BONDED SELF-REDUCING COMPOSITE PELLETS By Innocent Nikai Supervisor: Professor A.M. Garbers-Craig A dissertation submitted in partial fulfillment of the requirements for the degree MSc (Appl. Sci.): Metallurgy Department of Materials Science and Metallurgical Engineering, Faculty of Engineering, Built Environment and Information Technology,

  • HEAT TREATMENT OF IRON ORE AGGLOMERATES WITH MICROWAVE

    Keywords: microwaves, iron ore, magnetite, pelletizing, agglomerates . vi ÖZ DEM İR CEVHER İ AGLOMERELER İNİN M İKRODALGA ENERJ İSİ İLE ISITILMASI Çırpar, Çi ğdem Yüksek Lisans, Maden Mühendisli ği Bölümü Tez Yöneticisi: Prof.Dr. Ali İhsan Arol Ocak, 2005, 90 pages Peletleme, ince tane boyunda demir içeren konsantrelerin ve toz halindeki cevherlerin i şlenmesinde ...

  • 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 ...

  • HYL Process for Direct Reduction of Iron Ore – IspatGuru

    2017-04-22  HYL Process for Direct Reduction of Iron Ore. HYL process is designed for the conversion of iron ore (pellet/lump ore) into metallic iron, by the use of reducing gases in a solid-gas moving bed reactor. Oxygen (O2) is removed from the iron ore by chemical reactions based on hydrogen (H2) and carbon monoxide (CO) for the production of highly metallized direct reduced iron (DRI)/hot briquetted ...

  • Cleveland-Cliffs Inc. - About Us - Commercial Products

    While most iron ore producers mine, market and sell a commoditized product that is effectively fungible across most blast furnaces, our production of custom-made pellets is the true differentiating factor when comparing Cliffs to its peers in the iron ore space. During the 1950’s, Cliffs pioneered a process that beneficiated the lower-grade ore into high quality, custom made pellets. Since ...

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