Evaluation of the permeability of the dripping zone and of flooding phenomena in a blast furnace

Andrade, Dimas Henrique Barros; Tavares, Roberto Parreiras; Quintas, Alfredo Carlos Bitarães; Moreira, Victor Eric de Souza; Viana, Arthur Oliveira; Gasparini, Vitor Maggioni

doi:10.1016/j.jmrt.2017.10.001

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…In the cohesive zone, Chang et al [18] confirmed that the different graphitization degrees of coke were higher than those of the feed coke. Fines caused the poor permeability of the charge column and then hindered the gasification reaction and liquid slag-iron flow [19]. In the tuyere area, the graphitization of the tuyere coke was apt to cause surface scratching [20].…”

Section: Introductionmentioning

confidence: 99%

Microstructure analysis and mineral phase transformation of coke in blast furnace

Xie

Zeng

et al. 2022

Ironmaking & Steelmaking

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In order to reveal the actual reaction behaviour and degradation mechanism of coke, chemical composition, mineral phase transformation and microstructure of coke at different locations in blast furnace were characterized. Meanwhile, the wear and compressive resistance, as well as the secondary thermal characteristic, were carried out. Results indicated that the mineral species and contents of cokes were significantly affected by alkali metal minerals adhesion and molten slagiron corrosion. The alkali minerals and iron minerals adsorbed on the pore walls contributed to catalytic degradation of the bosh coke and tuyere coke respectively. In the upper zone of BF, the wear and compressive resistance of coke first decreased and then increased. The secondary thermal performance of BF coke was inverse with the content of alkali metal. The macropore structure of the hearth coke with the maximum graphitization disappeared to be replaced by slag and iron.

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Section: Introductionmentioning

confidence: 99%

Microstructure analysis and mineral phase transformation of coke in blast furnace

Xie

Zeng

et al. 2022

Ironmaking & Steelmaking

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Optimizing the Coinjection of Natural Gas and Pulverized Coal for Indian Blast Furnaces Toward Productivity Gains and Lower‐Carbon Emissions

Nurni

Hari

Biswas

et al. 2022

steel research int.

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India's stated goals to more than double steelmaking production capacity by 2030 merit consideration of new technical pathways for productivity gains and emission reduction. Already the second‐largest steel producer globally, India primarily relies on coal‐based technologies for ironmaking, with heavy reliance on imported metallurgical‐grade coal. This study develops an integrated thermodynamic modeling approach by iteratively coupling the raceway adiabatic flame temperature (RAFT) and Rist models to explore the ability to consider various hydrocarbon injectants through the tuyeres of a blast furnace. Based on the thermodynamic criteria set in the modeling framework, optimal coinjection rates for natural gas (as a low‐carbon feed) are identified along with pulverized coal injection as a function of various operating parameters, including top gas temperature, RAFT temperature, and ore processing (pelletization). The potential for productivity gains and CO2 emission reduction in the blast furnace process is discussed. While the study bears specificity to Indian operating conditions related to raw material composition and blast furnace process parameters, the learnings may be applicable to other studies in the global context, with potential extension to deeper decarbonization pathways, such as increased use of hydrogen.

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Integration of carbon capture technologies in blast furnace based steel making: A comprehensive and systematic review

Perpiñán

Peña

Bailera

et al. 2023

Fuel

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Evaluation of the permeability of the dripping zone and of flooding phenomena in a blast furnace

Cited by 4 publications

References 6 publications

Microstructure analysis and mineral phase transformation of coke in blast furnace

Microstructure analysis and mineral phase transformation of coke in blast furnace

Optimizing the Coinjection of Natural Gas and Pulverized Coal for Indian Blast Furnaces Toward Productivity Gains and Lower‐Carbon Emissions

Integration of carbon capture technologies in blast furnace based steel making: A comprehensive and systematic review

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