Effect of Hearth Liquid Level on the Productivity of Blast Furnace

Agrawal, Ashish; Kothari, Anil Kumar; Rao, K. Ramakrishna; Padmapal,; Singh, Manish Kumar

doi:10.1007/s12666-018-1545-z

Cited by 4 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the particle movement within the deadman is of great interest, as it is expected to greatly influence the bed permeability. 2) The combination of CFD with the Discrete Element Method (DEM), 12) in which particles are treated as individual entities, is especially suited for simulation of the blast furnace hearth, as it allows for the simultaneous evaluation of the liquid flow and solids movement. Additionally, through use of a multiphase CFD method such as Volume of Fluid, 23) the free surface of the liquid iron can be accounted for.…”

Section: Large-scale Blast Furnace Modellingmentioning

confidence: 99%

“…On the other hand, a completely stationary deadman might be prone to accumulation of fine cokes and char, leading to a non-desirable low-permeability bed state. 2,3) Figure 11 shows the temporally and radially averaged solids velocity profile obtained from the base case 4. One can clearly distinguish between the actively flowing layer towards the raceway region and the deadman.…”

Section: Deadman Coke Flowmentioning

confidence: 99%

See 1 more Smart Citation

Large-scale VOF/CFD-DEM Simulation of Blast Furnace Hearth Dynamics

et al. 2022

View full text Add to dashboard Cite

In this work, large-scale simulations of the blast furnace hearth are presented, conducted using a model combining Computational Fluid Dynamics, the Volume of Fluid method, and the Discrete Element Method. Using a 5 m diameter, full-3D geometry, the influence of burden weight, bi-disperse packing, and blocked tuyeres on the liquid and solids flow within the hearth are investigated. Horizontal and vertical porosity profiles are presented, and the influence of the dynamic liquid level on the state of the deadman is evaluated. The liquid iron flow during tapping is visualised, and the influence of a coke-free space on the flow pattern is analysed. The magnitude of the circumferential flow through the corner of the hearth is analysed, and found to decrease with increasing burden weight pressure and coke diameter in the bed centre. A significant influence of the dynamic deadman on the liquid flow pattern is found, especially in case of a floating deadman. In addition to the liquid flow, the solid coke flow towards the raceways is analysed. Two pathways for coke particles towards the raceway are uncovered, one path through the actively flowing layer above the deadman, and a second path moving through the deadman and entering the raceways from below. The balance between these two mechanisms was found to change during the tapping cycle. Lastly, implementations for heat and dissolved carbon mass transfer are presented, and demonstrated using a full-scale 10 m hearth simulation. Additional closures for heat and mass transfer rates are required, but the current model is found in good shape for future work.

show abstract

Section: Large-scale Blast Furnace Modellingmentioning

confidence: 99%

Section: Deadman Coke Flowmentioning

confidence: 99%