DEM study on ternary-sized particle segregation during the sinter burden charging process

Xu, Yongbin; Xu, Jian; Liao, Zhongju; Pei, Yuandong; Gao, Leizhang; Sun, Chengfeng; Kou, Mingyin; Wen, Liangyin

doi:10.1016/j.powtec.2018.11.062

Cited by 18 publications

(3 citation statements)

References 22 publications

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“…According to the contact model of Hertz-Mindlin and Newton’s second law of motion, the position of the particles can be tracked and updated at each time step until a steady state is achieved. The governing equations describing the translational and rotational motions for particle i during the interaction of particles, including the contact mechanisms in both normal and tangential directions, as shown in Figure b, can be written as m i normald u i / normald t = ∑ j ( F kn , ij + F kt , ij + F cn , ij + F ct , ij ) + m i g I i normald ω i / normald t = ∑ j M t , italicij where m i , u i , and ω i denote the mass, the translational velocity, and the angular velocity of particle I , respectively. I i represents the moment of inertia.…”

Section: Dem Modeling and Co2 Capture Testmentioning

confidence: 99%

Cross-Scale Transfer and Reaction Coupling during CO₂ Capture: A Novel DEM-PNM-Based Pore-to-Reactor-Scale Model

Li,

Shen,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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The mesoscale packing structure and its coupling with the gas flow and heterogeneous reaction kinetics are key for CO2 capture using CaO-based sorbents. A series of packing structures were constructed based on the discrete-element method (DEM), and the accuracy was verified by electronic computer X-ray tomography (CT). It was found that the random particle filling structure based on the DEM can accurately reflect the coordination number and connectivity between pores. Further, a two-dimensional pore network model (PNM) including the effects of packing structure evolution and diffusion–reaction kinetics was developed to study the multiscale coupling among gas flow, energy transport, and carbonation reactions in packed-bed reactors. The calculated results were validated by comparison with experimental data from thermogravimetric analyzer (TGA) tests during the CO2 capture process. The short-circuit flow of the reactive gas caused by the inhomogeneous packing structure of the binary composite packing bed was not linearly correlated with the mass percentage of the binary particles. The differences in the CO2 capture efficiency and sorbent utilization induced by the packing structure characteristics were demonstrated numerically to decrease gradually with the Peclet number at an inlet velocity of 0.8 m/s. Moreover, a dimensionless Thiele modulus was introduced to assess the effect of internal diffusion. This model and the obtained results can be used for the optimization and design of packed-bed reactors with gas–solid uncatalyzed reactions.

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Section: Dem Modeling and Co2 Capture Testmentioning

confidence: 99%

Cross-Scale Transfer and Reaction Coupling during CO₂ Capture: A Novel DEM-PNM-Based Pore-to-Reactor-Scale Model

Li,

Shen,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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“…However, there is a lack of analysis regarding the characteristics of the deflector plate for practical application. Xu et al analyzed the impact of particle size distribution on the permeability of the burden packed bed in the sintering process using DEM [14]. Furthermore, they proposed indicators such as segregation degree (SD) and segregation tendency (ST) to quantitatively evaluate the phenomenon of particle size segregation.…”

Section: Reinforcing Sinter Charging Segregationmentioning

confidence: 99%

Development of Cycloid-Shaped Roll Charging Chute for Sintering Process for Energy Decarbonization and Productivity Improvement in Steel Plants

Kwon,

Choi,

Lee

2024

Energies

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The global steel industry is rapidly transitioning towards energy decarbonization to address the climate crisis. Sintering is one of the main sources of greenhouse gas emissions from steel mills. Traditional sintering processes use straight inclined chutes to feed raw materials into the sinter machine. However, this design suffers from insufficient horizontal momentum, resulting in poor segregation of the layered materials. This study proposes an improved charging chute design profile that uses a cycloid curve and rolls to enhance segregation, thus reducing coal consumption and increasing productivity. To achieve this, we first modeled a charging chute using the cycloid curve. Secondly, building upon the cycloid concept, we created a roll-type chute by strategically placing rollers along the cycloid trajectory. Finally, the cycloid roll-type charging chute, integrating the cycloid trajectory with the roll-shaped charging chute, was simulated. Pilot tests comparing the cycloid roll-type and straight chute models demonstrated a significant increase in dispersion for the cycloid roll-type design, with a 65% improvement in the Strand-ward segregation (Sw) index compared to the straight chute. Furthermore, actual filed implementation in a sintering process achieved a 2.9% increase in operational productivity and a 6% reduction in fuel consumption. This study is significant not only for proposing an optimal chute design, but also for successfully implementing it in a full-scale steel mill, contributing to a reduction in fuel consumption and carbon reduction in steel mills.

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“…Besides porosity, size segregation is also used to reflect the bed structure and is widely used in the studies of blast furnace, which is easier to do qualitative or quantitative research in experiments and simulations. Therefore, many researchers [22][23][24][25][26] try to study the phenomenon, reasons and impacts of size segregation happened in the charging and discharging process of BF [27][28][29], liquid fluidized beds [30][31][32][33] and rotating drum [34] by experimental and simulated methods.…”

Section: Introductionmentioning

confidence: 99%

DEM study of the porosity distribution of pellet sandpile formed by ternary size particles

Han

et al. 2020

Powder Technology

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DEM study on ternary-sized particle segregation during the sinter burden charging process

Cited by 18 publications

References 22 publications

Cross-Scale Transfer and Reaction Coupling during CO₂ Capture: A Novel DEM-PNM-Based Pore-to-Reactor-Scale Model

Cross-Scale Transfer and Reaction Coupling during CO₂ Capture: A Novel DEM-PNM-Based Pore-to-Reactor-Scale Model

Development of Cycloid-Shaped Roll Charging Chute for Sintering Process for Energy Decarbonization and Productivity Improvement in Steel Plants

DEM study of the porosity distribution of pellet sandpile formed by ternary size particles

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DEM study on ternary-sized particle segregation during the sinter burden charging process

Cited by 18 publications

References 22 publications

Cross-Scale Transfer and Reaction Coupling during CO2 Capture: A Novel DEM-PNM-Based Pore-to-Reactor-Scale Model

Cross-Scale Transfer and Reaction Coupling during CO2 Capture: A Novel DEM-PNM-Based Pore-to-Reactor-Scale Model

Development of Cycloid-Shaped Roll Charging Chute for Sintering Process for Energy Decarbonization and Productivity Improvement in Steel Plants

DEM study of the porosity distribution of pellet sandpile formed by ternary size particles

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Product

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Cross-Scale Transfer and Reaction Coupling during CO₂ Capture: A Novel DEM-PNM-Based Pore-to-Reactor-Scale Model

Cross-Scale Transfer and Reaction Coupling during CO₂ Capture: A Novel DEM-PNM-Based Pore-to-Reactor-Scale Model