Effects of bottom base shapes on burden profiles and burden size distributions in the upper part of a COREX shaft furnace based on DEM

Kou, Mingyin; Xu, Jian; Zhou, Heng; Wen, Bingjie; Gu, Kai; Yao, Shun; Wu, Shengli

doi:10.1016/j.apt.2018.01.020

Cited by 26 publications

(9 citation statements)

References 39 publications

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“…To evaluate the radial burden size segregation in the throat of a blast furnace, segregation index (SI) was introduced, which is defined in previous work. [ 20,45,46 ] It can be expressed as follows.

{SI}_{normalk} = \frac{{FMR}_{normalk} - {IMR}_{normalk}}{{IMR}_{k}} \times 100 %

where IMR represents the initial mass ratio of each burden in the hopper, and FMR represents the final mass ratio of each burden in the blast furnace throat. Subscript k represents the burden type, where S, P, and O represent sinters, pellets, and lump ores, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

Hong

Zhou

et al. 2020

steel research int.

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In blast furnaces, the chute is the key device determining burden distribution. The effects of the chute's geometric and operational parameters on burden distribution have seldom been studied. Herein, the top of a bell‐less blast furnace is modeled based on the discrete element method to investigate the effects of chute length, stock‐line level and chute angle on particle movement, and radial burden distribution. The results indicate that burden particles are more likely to slide toward the opposite to the rotating direction as the chute length or angle increases. The burden distribution segregation is mainly caused by the segregation of particle velocity on the chute and the percolation of pellet on the chute. The burden tends to aggregate with increases in chute length and disperse with increases in stock‐line level or chute angle.

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{SI}_{normalk} = \frac{{FMR}_{normalk} - {IMR}_{normalk}}{{IMR}_{k}} \times 100 %

Section: Resultsmentioning

confidence: 99%

Section: Chute Lengthmentioning

confidence: 99%

Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

Hong

Zhou

et al. 2020

steel research int.

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“…The physical properties of both pellets and lump ores were obtained from the literature. [ 16,28,29 ] The applicability of these physical properties is confirmed by comparing the angle of repose obtained from the simulation and experimental results. [ 30 ] In the actual production process, pellets and lumps are filled with different charge ratios, which will affect the charge distribution and the porosity of the packed bed.…”

Section: Simulation Methodologymentioning

confidence: 98%

Influence of Lump Ore Ratio and Shapes on the Particle Flow Behavior Inside the Direct Reduction Shaft Furnace by Discrete Element Modeling Model

Liao

Zong

et al. 2022

steel research int.

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In recent years, with the attention given to hydrogen reduction‐related technologies, the parameter indicators of direct reduction in the shaft furnace have gained importance. Herein, the numerical simulation of the particle flow field in the shaft furnace is investigated with the help of discrete element method (DEM) model. In contrast to the subregional modeling and the single particle shape study of the previous studies, this study innovatively uses the real shape of the particles and the overall structure of the vertical furnace for modeling. The transient characteristics of solid particle flow under ten lump ore ratios and three shapes are considered. The results show that the mass fraction and the shape of lump ore have little effect on the particle falling speed, but have a significant effect on the particle segregation behavior. In addition, the void ratio responds to the permeability condition in the furnace, which is also influenced by the lump ore proportion and shape.

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“…And the particles diameters are enlarged for reducing the number of particles and hence the computational cost. Table 2 lists the materials properties and the simulation parameters (Kou et al 2018), and the mass ratios and densities of different burdens are obtained from the plant operation in Baosteel. In this work, the discharge rate is 610 particles per second.…”

Section: Simulation Conditionsmentioning

confidence: 99%

Influence of center gas supply device on gas–solid flow in COREX shaft furnace through DEM–CFD model

Zhou

Wang

et al. 2020

International Journal of Chemical Reactor Engineering

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AbstractIn order to develop the central gas flow in COREX shaft furnace, a new installment of center gas supply device (CGD) is designed. In this work, a coupled DEM–CFD model was employed to study the influence of CGD on gas–solid flow in COREX shaft furnace. The particle descending velocity, particle segregation behaviour, void distribution and gas distribution were investigated. The results show that the CGD affects the particles descending velocity remarkably as the burden falling down to the slot. Particle segregation can be observed under the inverse ‘V’ burden profile, and the influence of CGD on the particle segregation is unobvious on the whole, which causes the result that the voidage is slightly changed. Although the effect of CGD on solid flow is not significant, the gas flow in shaft furnace has an obvious change. Compared with the condition without CGD, in the case with CGD, the gas velocity is improved significantly, especially in the middle zone of the furnace, which further promotes the center gas distribution. Meanwhile, the pressure drop in the furnace with the installation of CGD is increased partly.

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Effects of bottom base shapes on burden profiles and burden size distributions in the upper part of a COREX shaft furnace based on DEM

Cited by 26 publications

References 39 publications

Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

Influence of Lump Ore Ratio and Shapes on the Particle Flow Behavior Inside the Direct Reduction Shaft Furnace by Discrete Element Modeling Model

Influence of center gas supply device on gas–solid flow in COREX shaft furnace through DEM–CFD model

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