Validation of Particle Size Segregation of Sintered Ore during Flowing through Laboratory-scale Chute by Discrete Element Method

Mio, Hiroshi; Komatsuki, Satoshi; Akashi, Masatoshi; Shimosaka, Atsuko; Shirakawa, Yoshiyuki; Hidaka, Jusuke; Kadowaki, Masatomo; Matsuzaki, Shinya; Kunitomo, Kazuya

doi:10.2355/isijinternational.48.1696

Cited by 67 publications

(64 citation statements)

References 17 publications

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“…Before doing the simulation of the granular flow in the ironmaking process, the effect of the particles shape on the granular behavior had to be solved, and the authors had proposed the method for the considering the particle shape by using the distributed values of rolling friction. 10) This method gave the good agreement with the experimental results of the particle …”

Section: Introductionsupporting

confidence: 72%

“…Then, the rolling friction in DEM was related to the rollability of particle. The method for considering particle shape by setting the individual rolling friction had given the significant agreement with the experimental results, 10) therefore, this method was applied to the present work.…”

Section: Discrete Element Methodsmentioning

confidence: 67%

“…The frictional coefficients of particle were estimated by shearing test of the single particles and comparing particle behavior, and the particle behaviors using these values had been already validated with the experimental work, which was reported. 10) These values had been already applied to the analysis of charging behavior in the rotating chute of the blast furnace, 11) and it had given fruitful information. Thus, these values were used in this work.…”

Section: Discrete Element Methodsmentioning

confidence: 99%

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Analysis of Traveling Behavior of Nut Coke Particles in Bell-type Charging Process of Blast Furnace by Using Discrete Element Method

et al. 2010

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The objective of this paper is to analyze the particle behavior in bell-type charging process of actual blast furnace by using Discrete Element Method (DEM). The circumferential balance of charged mass in the quad-hopper and the effect of the nut coke particle position in the quad-hopper on the traveling behavior and the segregation were discussed. The mass flow rate discharged from the rotating chute was fluctuated with the time, and the peak values gave when the directions of the chute movement became same as the one of the conveyor. It leads to the unbalance of charged particles in each part of the quad-hopper. The nut coke moved to the upward in the sintered ore particle layer during traveling to large bell from the quad-hopper due to the particle segregation, when they were segregated at the bottom of hopper. However their relative positions moved downward when they were segregated at the top, because the time for starting discharging of nut coke became faster. The installation of the damper at the way to the small bell from the hopper affects on the circumferential balance of mass of nut coke. Most of nut coke particles were charged at near the wall of blast furnace, and the small peak of the distribution of its specific charged mass was seen around 3.0 m in the radial distance from the center, it caused by the particle segregation during flowing on the particle layer. The relative radial distribution of the nut coke particles wasn't affected by their positions in the large bell and the total mass. Thus, keeping the circumferential balance of nut coke mass in the large bell is very important. The position of nut coke particle didn't affect on the segregation of sintered ore. The radial distributions of relative charged mass for all conditions were quite similar.

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Section: Introductionsupporting

confidence: 72%

Section: Discrete Element Methodsmentioning

confidence: 67%

Section: Discrete Element Methodsmentioning

confidence: 99%

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Analysis of Traveling Behavior of Nut Coke Particles in Bell-type Charging Process of Blast Furnace by Using Discrete Element Method

et al. 2010

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“…[7][8][9][10][11][12][13][14] Recently, discrete element model (DEM) is applied to the development of the burden distribution control by the improvement of the ability of computing machinery. [15][16][17] Where future raw material quality is concerned, high quality iron ore has been largely depleted, and atomization, high SiO 2 , and high Al 2 O 3 of iron ore are predicted. [18][19][20] Although sintering machine operation will be adjusted to cope with declining raw material quality, decreased raw material reducibility, increased slag rate, and similar problems are considered at the blast furnace.…”

Section: Development Of Control Techniques For Mixing Small Coke At Bmentioning

confidence: 99%

Development of Control Techniques for Mixing Small Coke at Bell-less Top Blast Furnace

Murao¹,

Kashihara²,

Oyama³

et al. 2015

ISIJ Int.

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“…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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Validation of Particle Size Segregation of Sintered Ore during Flowing through Laboratory-scale Chute by Discrete Element Method

Abstract: Fig. 21. Distribution of mass of collected particles in the sampling boxes when three kinds of particles were examined under 51°.

Cited by 67 publications

References 17 publications

Analysis of Traveling Behavior of Nut Coke Particles in Bell-type Charging Process of Blast Furnace by Using Discrete Element Method

Analysis of Traveling Behavior of Nut Coke Particles in Bell-type Charging Process of Blast Furnace by Using Discrete Element Method

Development of Control Techniques for Mixing Small Coke at Bell-less Top Blast Furnace

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

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