Stress Field and Solid Flow Analysis of Coke Packed Bed in Blast Furnace Based on DEM

Nouchi, Taihei; Sato, Taketomo; Sato, Michitaka; Takeda, Kanji; Ariyama, Tatsuro

doi:10.2355/isijinternational.45.1426

Cited by 56 publications

(34 citation statements)

References 7 publications

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“…These results are supposed to indicate that the lower surface is dominated by particle properties. However, on the other hand, the results of DEM simulation by Nouch et al 16) show that the lower surface of deadman has a slope only at periphery and has an good agreement to the dissection results of Mizushima No. 4 blast furnace, then their results is almost similar to the results of this work.…”

Section: Mechanics Of the Deadman Sinking In The Hearthmentioning

confidence: 85%

“…[12][13][14][15] Though, these works didn't go beyond the "case study" level, since it was too difficult to estimate and specify the packing condition of the hearth as a calculation condition, theoretically. Recently, Nouchi et al 16) applied a numerical simulation based on the discrete element method (DEM) to investigate the deadman behavior in the hearth. In addition to estimating the lower boundary shape of deadman, in other words, the coke free space in the hearth, they discussed the replacing mechanism of the deadman, such as the flow pattern and the less permeability layer formation, with reference to the dissection investigation of Mizushima No.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dissection Investigation of Blast Furnace Hearth—Kokura No. 2 Blast Furnace (2nd Campaign)

Inada¹,

Kasai²,

Nakano³

et al. 2009

ISIJ Int.

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Section: Mechanics Of the Deadman Sinking In The Hearthmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Dissection Investigation of Blast Furnace Hearth—Kokura No. 2 Blast Furnace (2nd Campaign)

Inada¹,

Kasai²,

Nakano³

et al. 2009

ISIJ Int.

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“…Therefore, the analysis of the microdynamic behaviour requires information about the transient forces acting on individual particles. The stress distribution in a model BF based on DPS has been examined, 24,25,36) showing some promising results. In this work, the forces such as particle-particle (including particle-wall) contact force and particle-fluid force are examined under the present model conditions.…”

Section: Stress State In Bfmentioning

confidence: 99%

“…The application of DPS to BF has been made by some researchers on various aspects, including burden distribution at the top, [18][19][20][21] gas-solid flow in BF shaft [22][23][24][25][26] and raceway, [27][28][29][30][31][32][33] and solid behaviour in the hearth. those studies are mainly focused on a particular region, e.g.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Transient Multiphase Flow in an Ironmaking Blast Furnace

Zhou

Zhu

et al. 2010

ISIJ Int.

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Discrete particle simulation (DPS) has been applied to multiphase flow modelling in an ironmaking blast furnace (BF), including burden distribution at the top, gas-solid flow in the BF shaft and raceway, and liquid-solid flow in the hearth. In this work, the approach is further extended to take into account the transient features of gas and particle flow coupled with liquid tapping operation. In the simulation, two types of particles of coke and ore with different physical properties are considered, together with different shapes of the cohesive zone and the shrinkage of size of ore particles in the cohesive zone to present ore reduction. The simulated results show that the flow of both solid and gas phases varies spatially and temporally, particularly in the cohesive zone. Gas flow is strongly affected by the layered structure of ore and coke particles in the cohesive zone. A coke-free zone can form in the hearth, and the boundary profile between the coke-free zone and the coke bed depends on the amount of liquid accumulated in the hearth, gas and solid flow rates in the raceway, and coke consumption in different regions at the interface of liquid and the coke bed. The results show that the complicated transient multiphase-flow in a BF can be captured by the present approach which may be extended to account for heat transfer and chemical reaction in the future.KEY WORDS: multiphase flow; discrete particle simulation; computational fluid dynamics; blast furnace; cohesive zone. 515

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“…[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] On the other hand, the discrete method is based on the Newton's second law of motion and is focused on the behavior of each and all individual particles in the system. [22][23][24][25][26][27][28][29][30] The discrete element method (DEM) is originally developed by Cundall and Strack 31) and is very effective to model granular materials. However, it is still very time-expensive to use this method for simulations of a blast furnace, even considering the development of computers hardware.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model of Solid Flow Behavior in a Real Dimension Blast Furnace

et al. 2013

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A mathematical model based on the continuum mechanic concept has been developed to describe the profile of solid particles in an industrial scale blast furnace with respect to the in-furnace conditions and its characteristics such as the shape and size of the deadman. The Navier-Stokes differential equation for multi-phase multi-dimensional space has been used to describe the behavior of existing phases. The surface stress tensor has been defined as an extra term and added to the Navier-Stokes equation to describe the particle-particle interactions. This extra term in the Navier-Stokes equation behave as a breaking force when the particles are sliding down. It is shown that the particles change their profile from a V-shape to a W-shape due to the characteristics of the deadman. Moreover, the velocity magnitude is higher at the outer surface of the deadman for higher grid-slabs in this region than the near-wall cells. However, the situation changes as solid particles moving to even lower level of grid-slabs at the outer surface of the deadman in comparison to near-wall cells. It has also been shown that an increase in the magnitude of the effective pressure reduces the velocity magnitude of descending particles.

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Stress Field and Solid Flow Analysis of Coke Packed Bed in Blast Furnace Based on DEM

Cited by 56 publications

References 7 publications

Dissection Investigation of Blast Furnace Hearth—Kokura No. 2 Blast Furnace (2nd Campaign)

Dissection Investigation of Blast Furnace Hearth—Kokura No. 2 Blast Furnace (2nd Campaign)

Numerical Investigation of the Transient Multiphase Flow in an Ironmaking Blast Furnace

Mathematical Model of Solid Flow Behavior in a Real Dimension Blast Furnace

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