Optimization of Coke Mixed Charging Based on Discrete Element Method

Terui, Koki; Kashihara, Yusuke; Hirosawa, Toshiyuki; Nouchi, Taihei

doi:10.2355/isijinternational.isijint-2017-204

Cited by 20 publications

(14 citation statements)

References 9 publications

(9 reference statements)

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“…First, it makes it easier to calculate the contact detection and forces, which greatly reduces the simulation time. Many researchers have investigated granular movements using simulations that consider particles as spheres [ 30–36 ] and have obtained results that agree well with plant or experimental data. Second, the effect of particle shape on the flow of coal particles is negligible when suitable parameters are used, as proven by Akashi et al Thus, it is appropriate to treat sinter particles as spheres in spite of their irregular shape.…”

Section: Model Establishmentmentioning

confidence: 83%

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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Section: Model Establishmentmentioning

confidence: 83%

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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“…This method is frequently used in DEM simulations, especially when the model under consideration is quite large. 26,27 Furthermore, after enlargement, the largest particle size is 135 mm, while the throat diameter is 5.5 m, which is 40.7 times larger than particle size. The throat diameter to particle diameter ratio is too large to have an impact on the mixing/segregation pattern.…”

Section: Simulation Conditionsmentioning

confidence: 97%

Simulation study on the effect of increasing pellet proportion on burden distribution in the blast furnace

Zhao,

Saxén,

Wang

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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As an effective method to strengthen blast furnace (BF) smelting and to realize reduced fuel operation, high-proportion pellet charging has become an inevitable trend in the BF ironmaking. However, due to the high rolling characteristics of pellets and the low repose angle of stockline, the high-proportion pellet charge structure also brings some difficulties to the control of gas distribution and the BF operation. In order to find out the burden distribution characteristics in the BF under high pellet ratio and provide theoretical guidance for improving the operation of high pellet ratio of the BF, a mathematical model of the upper part of the bell less BF is established, and the influence of pellet ratios on the burden distribution is analyzed by a discrete element method (DEM). The results show that as the proportion of pellet increases from 10% to 50%, the width of the stockline platform decreases from 1.081 m to 0.895 m, and the stockline angle decreases from 34.00° to 31.63°. With the increase in the proportion of pellets, the porosity of the stockline decreases, and the porosity along the radial direction from the furnace wall to the center also decreases gradually.

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“…The number of reports that analyze the blast furnace process using DEM simulation has been increasing. [12][13][14][15][16][17][18][19][20][21] In the conventional DEM, the object of the particle to be treated is a sphere, so that shape change by softening in cohesive zone could not be represented. An attempt was made to express softening in cohesive zone by reducing the young's modulus of particles.…”

Section: Introductionmentioning

confidence: 99%

Development of ADEM-SPH Coupling Model for Analysis of Solid to Liquid Phase Transition Behaviors

Ishihara

Kano

2020

ISIJ Int.

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A new simulation model for the analysis of solid to liquid phase transition behaviors inside the blast furnace was developed in this study. The solid state is treated by ADEM (Advanced Distinct Element Method) and the liquid state is treated by SPH (Smoothed particle Hydrodynamics). The intermediate state is treated by overlapped calculation of both ADEM and SPH. Numerical examinations for the analysis of several phenomena such as dam brake flow, droplet deformation due to the contact angle and phase transition were performed. The validity of the proposed model was confirmed by comparison with the experimental results of the motion of the leading edge in collapse of a water column in the dam break test. The phase transition behavior of ore was observed experimentally using horizontal furnace. The deformation started at about 1 200°C from the upper corner of sample pellet became round, and melted down to the whole with slight contraction. A similar behavior is also can be seen in the simulation by appropriately setting the relationship between the temperature and the joint spring coefficient. These results are indicated that the developed model has possibility to clarify the burdens behavior including the phase transition inside the blast furnace.

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Optimization of Coke Mixed Charging Based on Discrete Element Method

Cited by 20 publications

References 9 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

Simulation study on the effect of increasing pellet proportion on burden distribution in the blast furnace

Development of ADEM-SPH Coupling Model for Analysis of Solid to Liquid Phase Transition Behaviors

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