Investigation on the uneven distribution of different types of ores in the hopper and stock surface during the charging process of blast furnace based on discrete element method

2019 ◽  
Vol 116 (3) ◽  
pp. 314 ◽  
Author(s):  
Wenxuan Xu ◽  
Shusen Cheng ◽  
Qun Niu ◽  
Wei Hu ◽  
Jiawen Bang
Keyword(s):  
Blast Furnace ◽  
Discrete Element Method ◽  
Volume Fraction ◽  
Discrete Element ◽  
Peripheral Region ◽  
Volume Distribution ◽  
Intermediate Region ◽  
Different Types ◽  
Stock Surface ◽  
Element Method

The model of an actual 4070 m3 bell-less top blast furnace with two parallel hoppers was established, and the distribution of the sinter, pellet, and lump ore in the hopper and the stock surface was analyzed based on the discrete element method. The results show that the distribution of different types of ores is not uniform in the hopper already. In the radial direction of the stock surface, the sinter volume fraction in the center and peripheral region of the stock surface is higher than that in the intermediate region of the stock surface, but the volume distribution of the pellet and lump ore is opposite to the sinter volume distribution. Owing to the size of lump ore is small, so the pressure drop of burden layer in the intermediate region of the stock surface is larger than that in the center and peripheral region. In the circumferential direction of the stock surface, the standard deviation of the volume distribution of the sinter, pellet, and lump ore is 1.28, 0.92 and 0.49, respectively.

Computational study of granular shear flows of dry flexible fibres using the discrete element method

2015 ◽  
Vol 775 ◽  
pp. 24-52 ◽  
Author(s):  
Y. Guo ◽  
C. Wassgren ◽  
B. Hancock ◽  
W. Ketterhagen ◽  
J. Curtis
Keyword(s):  
Discrete Element Method ◽  
Shear Flows ◽  
Volume Fraction ◽  
Solid Phase ◽  
Computational Study ◽  
Solid Volume Fraction ◽  
Discrete Element ◽  
Effective Coefficients ◽  
Phase Stresses ◽  
Element Method

In this study, shear flows of dry flexible fibres are numerically modelled using the discrete element method (DEM), and the effects of fibre properties on the flow behaviour and solid-phase stresses are explored. In the DEM simulations, a fibre is formed by connecting a number of spheres in a straight line using deformable and elastic bonds. The forces and moments induced by the bond deformation resist the relative normal, tangential, bending and torsional movements between two bonded spheres. The bond or deforming stiffness determines the flexibility of the fibres and the bond damping accounts for the energy dissipation in the fibre vibration. The simulation results show that elastically bonded fibres have smaller effective coefficients of restitution than rigidly connected fibres. Thus, smaller solid-phase stresses are obtained for flexible fibres, particularly with bond damping, compared with rigid fibres. Frictionless fibres tend to align with a small angle from the flow direction as the solid volume fraction increases, and fibre deformation is minimized due to the alignment. However, jamming, with a corresponding sharp stress increase, large fibre deformation and dense contact force network, occurs for fibres with friction at high solid volume fractions. It is also found that jamming is more prevalent in dense flows with larger fibre friction coefficient, rougher surface, larger stiffness and larger aspect ratio.

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

2010 ◽  
Vol 50 (7) ◽  
pp. 1000-1009 ◽  
Author(s):  
Hiroshi Mio ◽  
Satoshi Komatsuki ◽  
Masatoshi Akashi ◽  
Atsuko Shimosaka ◽  
Yoshiyuki Shirakawa ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Discrete Element Method ◽  
Discrete Element ◽  
Nut Coke ◽  
Element Method

scholarly journals Characteristics of Solid Flow and Stress Distribution Including Asymmetric Phenomena in Blast Furnace Analyzed by Discrete Element Method

2010 ◽  
Vol 50 (2) ◽  
pp. 207-214 ◽  
Author(s):  
Shungo Natsui ◽  
Shigeru Ueda ◽  
Zhengyun Fan ◽  
Nils Andersson ◽  
Junya Kano ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Stress Distribution ◽  
Discrete Element Method ◽  
Discrete Element ◽  
Solid Flow ◽  
Element Method

scholarly journals Effect of Chute Angle on Charging Behavior of Sintered Ore Particles at Bell-less Type Charging System of Blast Furnace by Discrete Element Method

2009 ◽  
Vol 49 (4) ◽  
pp. 479-486 ◽  
Author(s):  
Hiroshi Mio ◽  
Satoshi Komatsuki ◽  
Masatoshi Akashi ◽  
Atsuko Shimosaka ◽  
Yoshiyuki Shirakawa ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Discrete Element Method ◽  
Discrete Element ◽  
Charging System ◽  
Element Method

scholarly journals Optimization of Physical Parameters of Discrete Element Method for Blast Furnace and Its Application to the Analysis on Solid Motion around Raceway

2009 ◽  
Vol 49 (9) ◽  
pp. 1308-1315 ◽  
Author(s):  
Shungo Natsui ◽  
Shigeru Ueda ◽  
Masashi Oikawa ◽  
Zhengyun Fan ◽  
Junya Kano ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Discrete Element Method ◽  
Discrete Element ◽  
Physical Parameters ◽  
Solid Motion ◽  
Element Method

scholarly journals Unresolved CFD and DEM Coupled Solver for Particle-Laden Flow and Its Application to Single Particle Settlement

2020 ◽  
Vol 8 (12) ◽  
pp. 983
Author(s):  
Seongjin Song ◽  
Sunho Park
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Discrete Element Method ◽  
Open Source ◽  
Single Particle ◽  
Volume Expansion ◽  
Volume Fraction ◽  
Discrete Element ◽  
Water Tank ◽  
Element Method

In the present study, a single particle settlement was studied using a developed unresolved computational fluid dynamics (CFD) and discrete element method (DEM) coupling solver. The solver was implemented by coupling OpenFOAM, the open-source computational fluid dynamics libraries, with LIGGGHTS, the open-source discrete element method libraries. An averaging method using a kernel function was considered to decrease the grid dependency. For the drag model of a single particle, a revised volume fraction with a particle volume expansion coefficient was applied. Falling particles in a water tank were simulated and compared with the empirical correlation. A parametric study using several integrated added mass coefficients and volume expansion coefficients from low to high Reynolds numbers was carried out. The simulations which used the developed numerical methods showed significantly improved predictions of particle settlement.

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