High-speed Video Recording of Particle Trajectory via Rotating Chute of Nagoya No.3 Blast Furnace and its Comparison with Simulated Behavior Using DEM

Mio, Hiroshi; Nakauchi, Toshiki; Kawaguchi, Yuuki; Enaka, Takashi; Narita, Yoichi; Inayoshi, Atsushi; Matsuzaki, Shinya; Orimoto, Takashi; Nomura, Seiji

doi:10.2355/isijinternational.isijint-2016-530

Cited by 19 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the importance of particle shape on the burden topography and the gas dynamics through the particle bed was also highlighted [27,28,29,30]. Nevertheless, in previous simulations the particle shape was generally modelled using spheres or clumped spheres, while particle angularity has been normally ignored.…”

Section: Introductionmentioning

confidence: 99%

The floating point: Rounding error in timing devices

Faux

Godolphin

2021

American Journal of Physics

View full text Add to dashboard Cite

In blast furnaces, burden topography and packing density affect the stability of the burden, permeability of gas flow as well as the heat transfer efficiency. A fundamental understanding of the influence and interaction of coke and ore particles on the burden topography and packing density is therefore essential, in particular the influence of particle shape polydispersity and particle size polydispersity. In this paper we analyze the effect of particle shape and size polydispersity on the coke and ore charge distribution inside a bell-less blast furnace using the discrete element method (DEM). We first validate experimentally the polyhedral particle model with a simplified lab-scale charging experiment. A comparative study between spheres, with rolling friction to account for shape, and polyhedra is conducted for shape and size polydisperse particle systems. It was found that shape polydispersity mainly influenced the topography of the burden, whereas the size polydispersity mainly influenced the inter-layer percolation, i.e. localized particle diffusion, hence the local spatial packing density. The differences between the spherical particle models and polyhedral particle models on the burden topography are also quantitatively and qualitatively presented, especially on the role of particle shape on the push-up of coke in the centre. This study demonstrates that modelling particle shape effects using spheres with rolling friction is insufficient to fully describe the complex behaviour of shaped particles in a blast furnace, as the particle shape has a noteworthy influence on the burden characteristics.

show abstract

Section: Introductionmentioning

confidence: 99%

The floating point: Rounding error in timing devices

Faux

Godolphin

2021

American Journal of Physics

View full text Add to dashboard Cite

show abstract

“…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.

View full text Add to dashboard Cite

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.

show abstract

“…The discrete element method (DEM) [6] is one of the most reliable simulation methods for analysis of the solid particle behavior, and an approach using the computational simulation based on DEM is extremely useful to grasp the phenomena found in the charging process of the blast furnace. Some studies on the modeling of solid flow in a blast furnace have been previously reported, for example, the raceway [7,8], solid flow in the blast furnace [9][10][11], gas-solid flow [12], hopper flow [13,14], and particle trajectory from the rotating chute [15], and authors have developed burden distribution simulators using DEM [16][17][18][19][20]. Validations of the particle trajectory discharged from the rotating chute were studied, and they showed good correlations [19,20].…”

Section: Introductionmentioning

confidence: 99%

Validation of the Burden Distribution of the 1/3-Scale of a Blast Furnace Simulated by the Discrete Element Method

et al. 2019

Self Cite

View full text Add to dashboard Cite

The objective of this paper was to develop a prediction tool for the burden distribution in a charging process of a bell-less-type blast furnace using the discrete element method (DEM). The particle behavior on the rotating chute and on the burden surface was modeled, and the burden distribution was analyzed. Furthermore, the measurements of the burden distribution in a 1/3-scale experimental blast furnace were performed to validate the simulated results. Particle size segregation occurred during conveying to the experimental blast furnace. The smaller particles were initially discharged followed by the larger ones later. This result was used as an input in the simulation. The burden profile simulated using DEM was similar to the experimental one. The terrace was found at the burden surface subsequent to ore-charging, and its simulated position simulated agreed with that of the experimental result. The surface angle of the ore layer was mostly similar. The simulated ore to coke mass ratio (O/C) distribution in the radial direction and the mean particle diameter distribution correlated with the experimental results very well. It can be concluded that this method of particle simulation of the bell-less charging process is highly reliable in the prediction of the burden distribution in a blast furnace. Author Contributions: Data curation, H.M.; Formal analysis, H.M. and Y.N.; Investigation, H.M.; Supervision, K.N. and S.N.; Validation, H.M.; Writing -original draft, H.M. Funding: This research receive no external funding. Conflicts of Interest:The authors declare no conflicts of interest.

show abstract

High-speed Video Recording of Particle Trajectory via Rotating Chute of Nagoya No.3 Blast Furnace and its Comparison with Simulated Behavior Using DEM

Cited by 19 publications

References 16 publications

The floating point: Rounding error in timing devices

The floating point: Rounding error in timing devices

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

Validation of the Burden Distribution of the 1/3-Scale of a Blast Furnace Simulated by the Discrete Element Method

Contact Info

Product

Resources

About