Blast furnace model for gas flow control

Danloy, G.; Mignon, J.; Bonte, L.

doi:10.1051/metal/199996060715

Cited by 4 publications

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“…Calculations performed in Ref. [10] using the numerical 2-D MOGADOR model (Model for Gas Distribution and Ore Reduction) [18] show that char accumulation blocks some of the burden voids and decreases the global permeability: void fraction is locally decreased and total pressure loss in BF increases. The char accumulates mainly in the cohesive zone, deadman, and hearth.…”

Section: Test Results and Discussionmentioning

confidence: 99%

Effect of pulverized coal residues on the blast furnace streaming conditions

Perret

Babich

Senk

2022

Ironmaking & Steelmaking

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Despite measures to increase pulverised coal (PC) conversion, part of the injected PC leaves the raceway as char, particularly at high injection rates. The coke/PC replacement ratio and, consequently, the blast furnace (BF) operation efficiency depends on the consumption of char by reactions of secondary gasification and added burden. This contribution focuses on the change in streaming conditions in different BF zones when coal particles leave the raceway. To investigate this, a 2-D physical BF cold model was used. Tests were conducted after injecting various amounts of PC and under various gas flow rates. Particle movement and accumulation were examined by measuring the pressure drop at different positions in the model. To evaluate the effect of PC on the gas permeability in vertical and horizontal directions, calculations using the Darcy-Weisbach/ Ergun equation were performed. The results will be used to improve CFD-modelling and the prediction of char behaviour in the BF.

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Section: Test Results and Discussionmentioning

confidence: 99%

Effect of pulverized coal residues on the blast furnace streaming conditions

Perret

Babich

Senk

2022

Ironmaking & Steelmaking

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“…Physically, the mixed layer would exhibit different characteristics when the successive two burden layers were structured differently . In a BF, the burden distribution needs to be adjusted according to different burden materials and inner running conditions . To examine its effects on pressure drop, several types of burden distribution are examined here.…”

Section: Resultsmentioning

confidence: 99%

Numerical investigation of mixed layer effect on permeability in a dynamic blast furnace

Dianyu

2020

Engineering Reports

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Gas flow distribution in a blast furnace (BF) plays a significant role in BF smooth operation, productivity, and thermal efficiency. It is affected by the distribution of burden materials composed of alternating coke and ferrous ore layers. While moving downward coke and ferrous layers of different sizes can mix and form the so-called mixed layers. Generally, the porosity is lower and hence the pressure drop is higher in the mixed layers. These variations can change the gas flow distribution and BF performance. Previous work tried to quantify the effect of material properties and process conditions on the formation of mixed layers and the resulting local porosity variation. However, these studies were often conducted under simplified conditions. Few were dedicated to the formation of mixed layers in a BF and its effect on BF performance. This work studies the formation of mixed layers in an experimental BF by using a combined computational fluid dynamics and discrete element method approach. The effect on BF performance was evaluated under different operational conditions including different size ratios of coke to iron ore particles, burden distribution, batch weight, and discharge rate.The results obtained were helpful to optimize burden charge for improving BF performance. K E Y W O R D Sblast furnace, computational fluid dynamics, discrete element method, mixed layer, permeability

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“…Development of a 2-D steady state BF model for gas distribution and ore reduction, MOGADOR, was jointly initiated in 1995 by (former) Arcelor and Corus in Europe in collaboration with CRM, Belgium. The model, primarily developed by Danloy et al (2001; Danloy 2008) predicts the CZ position considering the layered burden distribution. The effect of the layer structure on gas flow was captured by an anisotropic packed bed resistance that was used in the 2-D Ergun equation.…”

Section: Comprehensive Modelsmentioning

confidence: 99%

Numerical modelling of blast furnace – Evolution and recent trends

Abhale

Nurni

Saxén

2020

Mineral Processing and Extractive Metallurgy

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In a journey of centuries, the ironmaking blast furnace has gone through many technological changes, which made it a fit-for-purpose till today. However, for the first time in history, its existence is being challenged by other iron making processes, due to its high carbon footprint compared to others. Many researchers are working on adapting the existing blast furnace process to meet the new challenges. Modelling has played a crucial role in new adaptations of the process. The present review has been dedicated to historical developments of blast furnace modelling. The models are broadly classified into comprehensive, zone-specific, and data-driven models. The comprehensive models are further classified into lumped models, 1-D, 2-D and 3-D steady state and transient models, and CFD-DEM models. For the purpose of brevity, the zone-specific models are exemplified by burden distribution models only. Finally, developments in data-driven models are discussed, before some general conclusions are presented.

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Blast furnace model for gas flow control

Cited by 4 publications

References 0 publications

Effect of pulverized coal residues on the blast furnace streaming conditions

Effect of pulverized coal residues on the blast furnace streaming conditions

Numerical investigation of mixed layer effect on permeability in a dynamic blast furnace

Numerical modelling of blast furnace – Evolution and recent trends

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