Numerical investigation of burden distribution in ironmaking blast furnace

Li, Zhaoyang; Kuang, Shibo; Liu, Sida; Gan, Jieqing; Yu, Aibing; Li, Yuntao; Mao, Xiaoming

doi:10.1016/j.powtec.2019.05.047

Cited by 44 publications

(16 citation statements)

References 45 publications

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“…Note that the size and ore-to-coke ratio profiles are obtained from the second ore and coke layers as their structures can be maintained inside the throat, which can also be reflected in the study of other BFs. [42] The burden distribution, together with productivity, determines the solid inlet velocity that is assumed constant in the horizontal direction, considering that the solid flow in the upper part of a BF can be regarded as a ''plug flow.'' [43,44] In the current model, productivity is a simulation output in the present model, which depends on the in-furnace state under a given condition, as discussed previously.…”

Section: Simulation and Boundary Condi-tionsmentioning

confidence: 99%

CFD Modeling and Analysis of Particle Size Reduction and Its Effect on Blast Furnace Ironmaking

Jiao

Kuang

Liu

et al. 2020

Metall Mater Trans B

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Particle size reduction inevitably occurs inside ironmaking blast furnaces (BFs) but is not studied under BF conditions due to the lack of an effective tool. This paper simulates this phenomenon inside a 5000-m 3 commercial BF using a recently developed three-dimensional computational fluid dynamics (CFD) process model. In particular, the sinter reduction degradation and coke gasification are modeled for considering the size reduction. By incorporating this information in the BF model, the in-furnace states and global performance are evaluated with respect to sinter reduction degradation index (RDI) under different conditions, e.g., keeping a constant blast rate or gas pressure drop. The results show that with increasing RDI, the bed permeability deteriorates, and there exists a critical value of RDI beyond which the decreased bed permeability leads to a significant drop in productivity for a given gas pressure drop. However, this problem can be mitigated substantially by charging more coke particles at the furnace periphery under the conditions considered. The proposed approach offers an extended capability to model and control BF operations.

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Section: Simulation and Boundary Condi-tionsmentioning

confidence: 99%

CFD Modeling and Analysis of Particle Size Reduction and Its Effect on Blast Furnace Ironmaking

Jiao

Kuang

Liu

et al. 2020

Metall Mater Trans B

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“…As an example, Figures 2(a) and 2(b), respectively, show the porosity distributions and enlarged CZ profiles in the BF without HGI and with HGI of 100% CO both before and after coke reduction. It is shown that inverse V-shaped CZs are obtained in all the operations, which is mainly controlled by the burden distribution pattern and hence porosity distribution [55,56]. However, the CZ position rises significantly due to the HGI of 100% CO. is suggests that there is excessive energy in the BF with HGI of 100% CO before coke reduction.…”

Section: Terms Formulationmentioning

confidence: 94%

Computational Study of Hot Gas Injection (HGI) into an Ironmaking Blast Furnace (BF)

Feng

Wang

2021

Mathematical Problems in Engineering

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Blast furnace (BF) ironmaking is the most important process that produces hot metal (HM) from iron-bearing materials continuously, rapidly, and efficiently. To date, the process is considered to have reached its limit in view of the achieved high process efficiency. In addition, the required high-quality materials are expensive and gradually getting depleted. Hot gas injection (HGI) into the shaft of the BF is an emerging technology recognized potential to solve the aforementioned problems. However, so far, limited information and studies are available, most of which are preliminary studies with regard to the feasibility and aerodynamics of the technology. This hindered the understanding and thus the effective use of this technology. This work presents a numerical study of the multiphase flow, heat, and mass transfer in a BF by a CFD-based process model. The effects of injection composition in terms of CO and CO2 contents in HGI are studied first. The calculated results reveal that HGI of 100% CO delivers the best BF performance. Then, the effects of key variables in relation to HGI of 100% CO, including position, rate, and temperature, are systematically studied. The in-furnace states and overall performance parameters have been analysed in detail. The results show that, through appropriate control of the injection variables, it is possible to achieve improved BF performance including low fuel rate and high productivity, which are considerably affected by the HGI parameters. The BF process model is also demonstrated to be a cost-effective tool in optimizing the key variables of HGI in BF for obtaining optimum process efficiency.

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“…It can be seen that the mentioned models [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ] differ from each other not only in the method used but mostly in the type and place of input data collection. The less intrusive the measure, the more sophisticated the modeling methods used.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Coke Layers Situation in the Cohesive Zone of Blast Furnace

2021

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Coke is the only batch component that does not soften in blast furnace thermal conditions. It is especially important at the temperatures of the cohesive zone forming because coke layers are the only gas-permeable charge. The aim of the work described in this article is the identification of individual coke layers situation in the cohesive zone. Numerical calculations of the cohesive zone situation are based on the horizontal below burden probe measures, however, coke layers are calculated using analytical geometry. The results can be presented as a bitmap; the individual and total area of the coke layers passing gases through the cohesive zone is also calculated. This form of results allows for subjective but quick assessment of the blast furnace operation by its crew.

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Numerical investigation of burden distribution in ironmaking blast furnace

Cited by 44 publications

References 45 publications

CFD Modeling and Analysis of Particle Size Reduction and Its Effect on Blast Furnace Ironmaking

CFD Modeling and Analysis of Particle Size Reduction and Its Effect on Blast Furnace Ironmaking

Computational Study of Hot Gas Injection (HGI) into an Ironmaking Blast Furnace (BF)

Calculation of Coke Layers Situation in the Cohesive Zone of Blast Furnace

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