Model study of the effect of particles structure on the heat and mass transfer through the packed bed in ironmaking blast furnace

Natsui, Shungo; Takai, Hifumi; Nashimoto, Ryota; Kikuchi, Tatsuya

doi:10.1016/j.ijheatmasstransfer.2015.08.033

Cited by 29 publications

(12 citation statements)

References 26 publications

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“…To overcome this shortcoming, discrete element method (DEM) which describes granular flow at an individual particle level, has been widely used for studying the fundamental behaviour of solid flow in ironmaking processes, e.g. blast furnace [10][11][12][13][14][15] and smelting reduction process such as COREX and FINEX. [16][17][18][19][20] The detailed micro-dynamic information of individual particles such as particle velocity and interaction forces between particles can be obtained by DEM.…”

Section: )mentioning

confidence: 99%

Discrete Particle Simulation of Solid Flow in a Large-Scale Reduction Shaft Furnace with Center Gas Supply Device

Zhou

Kou

et al. 2018

ISIJ International

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Section: )mentioning

confidence: 99%

Discrete Particle Simulation of Solid Flow in a Large-Scale Reduction Shaft Furnace with Center Gas Supply Device

Zhou

Kou

et al. 2018

ISIJ International

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“…8,38) There have been lots of literature concerning on the details of the multi-scale in-furnace states based on the numerical simulation. [39][40][41][42][43][44][45][46][47][48][49][50][51][52] The main body is very important for the operation and optimization of a blast furnace. Ueda et al investigated the influence of shape of cohesive zone on the gas flow inside main body of blast furnace based on DEM-CFD model.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Effects of Different Blast Parameters on the Gas and Burden Distribution Characteristics Inside Blast Furnace

et al. 2020

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Blast parameters are easy to be changed and are often applied to control the gas distribution in blast furnace. However, the effects of blast parameters on the gas and solid distribution characteristics were seldom investigated. Therefore, a 3D model considering gas and solid fluid phases is developed and used to analyze effects of blast parameters on the gas and solid distributions in the blast furnace B of Baiyi Steel. The results show that the gas temperature increases a little in the lower part while decreases in the middle and top parts of blast furnace when the oxygen enrichment ratio and blast temperature increase. The CO utilization ratio increases with the increase of oxygen enrichment ratio, humidified blast amount and blast temperature, and it increases most for the case of blast temperature. The metallization ratio at the bottom of the blast furnace increases with the increase of oxygen enrichment ratio and humidified blast amount while it decreases with the increase of gas temperature.

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“…Apart from the mixing observation based on solid phase, the gas pressure drop across granulated mixtures is studied as well . Furthermore, the effect of particles structure on the heat and mass transfer through the packed bed and the effect of high reactivity coke for mixed charge in ore layer on reaction behavior of each particle in BF have been examined . Nevertheless, the cases studied were limited to small scaled local BF area within a short operation period.…”

Section: Introductionmentioning

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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Model study of the effect of particles structure on the heat and mass transfer through the packed bed in ironmaking blast furnace

Cited by 29 publications

References 26 publications

Discrete Particle Simulation of Solid Flow in a Large-Scale Reduction Shaft Furnace with Center Gas Supply Device

Discrete Particle Simulation of Solid Flow in a Large-Scale Reduction Shaft Furnace with Center Gas Supply Device

Numerical Analysis of Effects of Different Blast Parameters on the Gas and Burden Distribution Characteristics Inside Blast Furnace

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

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