Blast Furnace Operating Conditions Manipulation for Reducing Coke Consumption and CO<sub>2</sub> Emission

Bahgat, M.; Halim, K. S. Abdel; El-Kelesh, H. A.; Nasr, M. I.

doi:10.1002/srin.201200001

Cited by 14 publications

(8 citation statements)

References 11 publications

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“…Presented two‐staged mechanism is more advantageous from viewpoint of kinetics than the wustite reduction proceeding according to reaction only:

FeO + CO = Fe + C {normalO}_{2} (2)

At high temperatures, which are typical for wustite reduction, the main role for the kinetics play the diffusion processes . And reaction has an advantage over reaction because of the high diffusivity of hydrogen . The reaction , however, takes place in the gas phase, where diffusion processes proceed very spontaneously.…”

Section: Discussionmentioning

confidence: 99%

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Theoretical Study of the Hydrogen Influence on Iron Oxides Reduction at the Blast Furnace Process

Bernasowski

2013

steel research int.

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In recent years, environmental considerations and requirements about limiting of carbon dioxide emissions into the atmosphere again forced researchers to consider hydrogen as an alternative reducer at the ironmaking processes. In those studies, the reduction of iron oxides by a mixture of hydrogen and carbon monoxide mainly was considered, but reducing ability of solid carbon was taken into account rarely. The article presents an analysis of the impact of different content of hydrogen and carbon monoxide on the reduction processes equilibrium at the blast furnace conditions. Calculations were performed by using the FactSage thermochemical software and databases. The study presents influence of hydrogen content in the bosh gas on range of wustite stability at the blast furnace process conditions. The calculations revealed possible mechanisms of wustite reduction and role of water−gas shift reaction and hydrogen itself.

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“…Presented two‐staged mechanism is more advantageous from viewpoint of kinetics than the wustite reduction proceeding according to reaction only:

FeO + CO = Fe + C {normalO}_{2} (2)

Section: Discussionmentioning

confidence: 99%

“…In investigation of the hydrogen influence on the iron oxides reduction are often used gas mixtures consisting of different shares of H 2 and CO with their possible dilution with nitrogen . It is especially important for development of the non‐coke ironmaking methods.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of the Hydrogen Influence on Iron Oxides Reduction at the Blast Furnace Process

Bernasowski

2013

steel research int.

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“…Consequently, material flows and energy flows analysis model should be established based on material balance and thermal equilibrium. Moreover, operation parameters [31], which represent the coupling quality between material flows and energy flows, should also be listed.…”

Section: Data Collectionmentioning

confidence: 99%

An All-Factors Analysis Approach on Energy Consumption for the Blast Furnace Iron Making Process in Iron and Steel industry

et al. 2019

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The blast furnace iron making process (BFIMP) is the key of the integrated steel enterprise for energy saving due to its largest energy consumption proportion. In this paper, an all-factors analysis approach on energy consumption was proposed in BFIMP. Firstly, the BFIMP composition and production data should be collected. Secondly, the material flows and energy flows analysis models could be established based on material balance and the thermal equilibrium. Then, the all influence factors (mainly including material flows, energy flows and operation parameters) on energy consumption were obtained. Thirdly, the main influence factors, which influenced the coke ratio (CR) and the pulverized coal injection ratio (PCIR), were obtained by using the partial correlation analysis (PCA) method, because CR and PCIR were the key energy consumption performance in BFIMP. Furthermore, anall-factors analysis result could be achieved by a multivariate linear model (MLR), which was established through these main influence factors. The case study showed that the PCIR was the most effective parameter on CR; when it was increased by 1% (0.84 kg/t), the CR would reduce by 0.507 kg/t. Therefore, the increase in PCIR consumption is the key measure to realize energy saving for BFIMP. The results showed that the improvement of some material flows, energy flows and operation parameters could increase the amount of PCIR, such as sinter size, ore grade, sinter grade, M10, blast volume, blast temperature and especially for sinter alkalinity. Moreover, theall-factors analysis approach on energy consumption can widely be used in various BFIMPs, too.

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“…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][2][3][4][5][6][7][8][9] . Studies on the chemical and physical properties and the reduction behavior in coal of hematite iron ores are investigated 2 .…”

Section: Reduction Of Iron Oresmentioning

confidence: 99%

Reduction Behavior of Low Grade Iron Ore at Reducing Conditions Simulating Different Zones of Blast Furnace

Al-Kelesh

Nasr

2019

Mat. Res.

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Representative technological samples for Baharia iron ore are collected from El-Gedida iron ore mines at the western desert of Egypt. Baharia iron ore was fired at 1000ºC for 3 hours, then the green and fired samples was isothermally reduced by different ratios of H 2 /CO/CO 2 /N 2 which closely represent the theoretical reduction conditions in different zones of blast furnace. The influence of reduction conditions on the reduction behaviour and the morphology of the reduced samples were investigated. Reduction behavior is arranged as: (cohesive>thermal reserve>top) zones due to reduction power of different zones which affect the microstructure of reduced samples. As a result of slow reaction at top conditions, reducing gas created tracks within the samples which increase porosity. On the other hand at cohesive conditions, grain growth occurred and small spherical grains of fired samples were semi-melted forming sintered clusters. The comparative reduction behavior for green and fired iron ore was investigated. At cohesive zone, the effect of firing can hardly be distinguished. But at thermal reserve and top zones conditions, the reduction rate of fired samples is greater than that for the green samples and that was confirmed by morphological examination of them.

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Blast Furnace Operating Conditions Manipulation for Reducing Coke Consumption and CO₂ Emission

Cited by 14 publications

References 11 publications

Theoretical Study of the Hydrogen Influence on Iron Oxides Reduction at the Blast Furnace Process

Theoretical Study of the Hydrogen Influence on Iron Oxides Reduction at the Blast Furnace Process

An All-Factors Analysis Approach on Energy Consumption for the Blast Furnace Iron Making Process in Iron and Steel industry

Reduction Behavior of Low Grade Iron Ore at Reducing Conditions Simulating Different Zones of Blast Furnace

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Blast Furnace Operating Conditions Manipulation for Reducing Coke Consumption and CO2 Emission

Cited by 14 publications

References 11 publications

Theoretical Study of the Hydrogen Influence on Iron Oxides Reduction at the Blast Furnace Process

Theoretical Study of the Hydrogen Influence on Iron Oxides Reduction at the Blast Furnace Process

An All-Factors Analysis Approach on Energy Consumption for the Blast Furnace Iron Making Process in Iron and Steel industry

Reduction Behavior of Low Grade Iron Ore at Reducing Conditions Simulating Different Zones of Blast Furnace

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Blast Furnace Operating Conditions Manipulation for Reducing Coke Consumption and CO₂ Emission