ADEM Simulation for Analysis of Particle Breakage of Irregular Shaped Particles

Ishihara, Shingo; Kano, Junya

doi:10.2355/isijinternational.isijint-2018-688

Cited by 13 publications

(4 citation statements)

References 18 publications

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“…15) The softening and the melting behaviors due to the phase transition are dealt with ADEM. 16,17) After phase transition, the melt behavior is dealt with SPH. 18,19) The present work was attempted to predict the structural change of packed bed of iron ore due to softening.…”

Section: Prediction Of Softening Behavior Of Simulant Sinter Ore By Adem-sph Modelmentioning

confidence: 99%

Prediction of Softening Behavior of Simulant Sinter Ore by ADEM-SPH Model

et al. 2020

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Softening and melting phenomena of burdens in the cohesive zone in the blast furnace are factors that cause the deterioration of gas permeability. Numerical examinations to predict the softening behavior of burdens in the packed bed were performed in this study. In order to represent the softening characteristics of the simulant sinter ore, the simulation of a single pellet load softening test was carried out. The strength properties of the pellets were evaluated by the shrinkage degree in the load softening test.Shrinkage degree of pellets with different basicity and pre-reduction ratio were attempted to reproduce. To represent the softening behavior of the pellet, ADEM (Advanced Distinct Element Method) SPH (Smoothed Particle Hydrodynamics) coupling model was applied. Softening and shrinkage could be represented by decreasing the joint spring coefficient while the pellet was loaded. The relationship between the joint spring coefficient and the temperature was determined to compare the shrinkage degree obtained in the experiment and the simulation. The determined joint spring coefficient was used to predict the softening behavior in the load softening test of a packed bed. The simulation results of the shrinkage degree curve showed good agreement with the experimental results. It was indicated that the softening behavior in the cohesive zone could be predicted by this calculation method.

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Section: Prediction Of Softening Behavior Of Simulant Sinter Ore By Adem-sph Modelmentioning

confidence: 99%

Prediction of Softening Behavior of Simulant Sinter Ore by ADEM-SPH Model

et al. 2020

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“…Advanced distinct element method (ADEM) has been proposed to analyze various behavior of solids such as moving motion of non-spherical particle and breakage behavior. 30,31) In this study, ADEM is attempted to represent the behavior of phase transition. The softening and the melting behaviors due to the phase transition are dealt with ADEM.…”

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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“…In the cohesive zone particularly, since the iron ore partially melts and forms a half-melted integrated layer in the packed bed, 1) the pressure loss becomes large, which greatly affects the gas permeability in the blast furnace. [2][3][4][5][6][7][8][9] Solid-liquid phases coexist in the cohesive and dripping zones, and since the liquid fills the void of the packed bed, the pressure loss in these zones is larger than that of the lumpy zone.…”

Section: Introductionmentioning

confidence: 99%

Influence of Atmosphere and Basicity on Softening and Melting Behaviors of the CaO–FeO–SiO2–Al2O3–MgO System

Ueda

Miki²,

Kim

et al. 2020

ISIJ Int.

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In this study, we analyze the softening and melting behaviors of the CaO-FeO-SiO 2 -Al 2 O 3 -MgO system for improving gas permeability in a blast furnace. The temperature of the oxide is increased to 1 723 or 1 773 K in a CO/CO 2 mixture; the softening and melting temperatures and the temperature of penetration into the coke bed are measured. Because the CO/CO 2 ratio in the atmosphere influences the stable state of iron or iron oxide, the softening and melting behaviors are investigated for numerous CO/CO 2 ratios. We observe that the reduction of the sample progresses in an atmosphere with a high CO/CO 2 ratio, and thus, the softening temperature increases. Because the composition of the oxidation phase influences the solidus and liquidus temperatures, the influence of basicity on the phenomena is also investigated, and a method of reducing the difference between the softening and dripping temperatures is discussed.

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ADEM Simulation for Analysis of Particle Breakage of Irregular Shaped Particles

Cited by 13 publications

References 18 publications

Prediction of Softening Behavior of Simulant Sinter Ore by ADEM-SPH Model

Prediction of Softening Behavior of Simulant Sinter Ore by ADEM-SPH Model

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

Influence of Atmosphere and Basicity on Softening and Melting Behaviors of the CaO–FeO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–MgO System

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