Discrete Particle Simulation of Solid Flow in a Large-Scale Reduction Shaft Furnace with Center Gas Supply Device

Zhou, Heng; Wu, Shengli; Kou, Mingyin; Luo, Zhiguo; He, Wei; Zou, Zongshu; Shen, Yansong

doi:10.2355/isijinternational.isijint-2017-545

Cited by 20 publications

(11 citation statements)

References 33 publications

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“…Recently, the DEM method has been used as an effective tool to investigate the particle motion and numerous studies are validated well by experiments [24][25][26][27][28][29]. In DEM, each particle in the considered system has both translational and rotational motion.…”

Section: Model Description 21 Discrete Element Methodsmentioning

confidence: 99%

“…Based on works of Moysey and Owen, [34,35] both the mass flow rate and the descending velocity of particles are considered to be linear function of the rotational speed of screws. The rotational speed of screws in the model is enlarged to 300 rpm [28]; for speeding up the calculations, the shear modulus of pellet, ore and coke is set to 10, 10, 2.2 and 10 MPa respectively [36,37]. In this work, the burden in the Table 1.…”

Section: Simulation Conditionsmentioning

confidence: 99%

“…Li et al developed a threedimensional DEM-based model to investigate the influence of screw design on burden descending velocity and particle segregation in COREX shaft furnace and the optimization design was proposed [27]. Recently, Zhou et al developed a three-dimensional DEM method to investigate the solid flow in the shaft furnace with CGD, but this work did not consider the effect of CGD structure on the burden descending behavior [28]. Although there are numerous researches on solid flow of COREX shaft furnace, the study on the influence of CGD structure on the burden descendent behavior in the shaft furnace has not been reported.…”

Section: Introductionmentioning

confidence: 99%

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Influence of CGD structure on burden descending behavior in COREX shaft furnace

Zhang

Zou

Luo

2019

Metall. Res. Technol.

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For improving the reducing gas flow in the center of a large-scale shaft furnace, the central gas distribution (CGD) device, a new technique, is proposed and installed in the shaft furnace. Because of its lessdeveloped history, the solid flow in the shaft furnace with CGD is unclear. In this work, a three-dimensional cylindrical model of COREX-3000 shaft furnace in actual size is established based on DEM. Four types of burden, including pellet, lump ore, coke and flux, are taken into consideration in the model. The model is validated by experiment and then it is used to investigate the influence of CGD structure on solid flow patterns, burden descending velocity, interaction force and abrasive wear. The results show that the CGD structure has some effects on the solid flow patterns and burden descending velocity. As the CGD diameter increases, the interaction force between particles is decreased but the total abrasion energy on CGD is increased. As the CGD height increases, both the interaction force between particles and the total abrasion energy on CGD are decreased.Keywords: COREX shaft furnace / central gas distribution (CGD) / DEM / solid flow / interaction force *

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Section: Model Description 21 Discrete Element Methodsmentioning

confidence: 99%

Section: Simulation Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of CGD structure on burden descending behavior in COREX shaft furnace

Zhang

Zou

Luo

2019

Metall. Res. Technol.

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“…13) Zhou et al studied the effect of center gas supply device on the solid flow of a large-scale reduction shaft furnace based on discrete element method (DEM). 14) Ghadi et al studied the effect of dual gas injection system on the distribution of process variables and energy consumption in the MIDREX shaft furnace based on gas-solid phase model. 15) The existing approaches can be discrete-based (e.g.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Effects of Different Blast Parameters on the Gas and Burden Distribution Characteristics Inside Blast Furnace

et al. 2020

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Blast parameters are easy to be changed and are often applied to control the gas distribution in blast furnace. However, the effects of blast parameters on the gas and solid distribution characteristics were seldom investigated. Therefore, a 3D model considering gas and solid fluid phases is developed and used to analyze effects of blast parameters on the gas and solid distributions in the blast furnace B of Baiyi Steel. The results show that the gas temperature increases a little in the lower part while decreases in the middle and top parts of blast furnace when the oxygen enrichment ratio and blast temperature increase. The CO utilization ratio increases with the increase of oxygen enrichment ratio, humidified blast amount and blast temperature, and it increases most for the case of blast temperature. The metallization ratio at the bottom of the blast furnace increases with the increase of oxygen enrichment ratio and humidified blast amount while it decreases with the increase of gas temperature.

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“…COREX is the world's first commercially established and industrially proven smelting-reduction process [1,2]. It is a two-stage process that involves pre-reduction in a shaft furnace, followed by final reduction and separation in a melter gasifier [3][4][5]. The melter gasifier is the key reactor of the COREX process.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Raceway Zone in Melter Gasifier of COREX Process

et al. 2019

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The physical and chemical processes in the raceway zone of the COREX melter–gasifier express are similar to those inside the blast furnace. Based on the research achievements on blast furnaces, the unsteady numerical simulation of a gas-solid two-phase in the raceway was carried out by using computational fluid software. The formation process of the raceway in the COREX melter–gasifier was simulated. The shape and size of the raceway were obtained. Then, the effect of gas flow on the depth and height of the raceway was analyzed in this paper.

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Discrete Particle Simulation of Solid Flow in a Large-Scale Reduction Shaft Furnace with Center Gas Supply Device

Cited by 20 publications

References 33 publications

Influence of CGD structure on burden descending behavior in COREX shaft furnace

Influence of CGD structure on burden descending behavior in COREX shaft furnace

Numerical Analysis of Effects of Different Blast Parameters on the Gas and Burden Distribution Characteristics Inside Blast Furnace

Numerical Simulation of the Raceway Zone in Melter Gasifier of COREX Process

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