Pressure Drop in the Blast Furnace Hearth with a Sitting Deadman

Shao, Lei; Saxén, Henrik

doi:10.2355/isijinternational.51.1014

Cited by 5 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tanzil et al 7 argued that the pressure distribution in the hearth is fairly uniform except in the vicinity of the taphole, where the pressure gradient is very high and a major part of the driving overpressure is balanced by the viscous resistances due to the accelerating liquid flow through the dead man. This was also demonstrated by Shao and Saxeń, 19 who simulated the flow behavior of a single liquid phase in the hearth. The simulations showed that the streamlines converge at the taphole and that the pressure gradient is appreciable only in the vicinity of the taphole.…”

Section: Numerical Modelingsupporting

confidence: 57%

Simulation Study of Blast Furnace Drainage Using a Two-Fluid Model

Shao

Saxén

2013

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Drainage behavior in the hearth plays an important role in the operation of ironmaking blast furnaces, as the undisturbed extraction of the produced liquid iron and slag is a prerequisite of smooth operation. An improved two-fluid model for simulating the drainage behavior of iron and slag in a blast furnace hearth is developed in this work. A piecewise-linear interface calculation scheme for interface tracking is utilized to prevent interfacial penetration, and a general expression of the drag force for stratified flow is applied between the liquid phases. A theoretical equation between the drainage rate and the interface tilt angle near the taphole is also proposed. The actual iron−slag system and a water−oil system, which is often used in small-scale physical models of a furnace hearth, were simulated by the two-fluid model and by the well-established volume of fluid model. The differences between the results of the two numerical models were studied for a short-term drainage process, and the performance of the models was analyzed with respect to their predictions of the interface between the liquids and the angles of the interface close to the taphole.

show abstract

Section: Numerical Modelingsupporting

confidence: 57%

Simulation Study of Blast Furnace Drainage Using a Two-Fluid Model

Shao

Saxén

2013

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A substantial pressure drop in the vicinity of the taphole can be formed as the high-viscosity slag is driven to flow through the dead man towards the taphole. As a result, the gas-slag interface is tilted down locally near the taphole [24,[59][60][61][62]. Thus, the overall gas-slag interface is above the taphole level at the moment when gas bursts out and the tap is terminated.…”

Section: Drainage Behaviormentioning

confidence: 99%

Dead-Man Behavior in the Blast Furnace Hearth—A Brief Review

et al. 2020

Self Cite

View full text Add to dashboard Cite

The blast furnace campaign length is today usually restricted by the hearth life, which is strongly related to the drainage and behavior of the coke bed in the hearth, usually referred to as the dead man. Because the hearth is inaccessible and the conditions are complex, knowledge and understanding of the state of the dead man are still limited compared to other parts of the blast furnace process. Since a number of publications have studied different aspects of the dead man in the literature, the purpose of the current review is to compile the findings and knowledge in a comprehensive document. We mainly focus on contributions with respect to the dead man state, and those assessing its influence on the hearth performance in terms of liquid flow patterns, lining wear and drainage behavior. A set of common modeling approaches in this specific furnace area is also briefly presented. The aim of the review is also to deepen the understanding and stimulate further research on open questions related to the dead man in the blast furnace hearth.

show abstract

“…The liquid flow in a BF hearth, however, is typically complicated and does not appear in a single flow regime. The liquids are in low‐Reynolds‐number (LRN) flow as they dribble into the hearth, whereas they gradually accelerate as they approach the taphole due to the high geometrical ratio (hearth diameter/taphole size > 100), causing HRN flow in the vicinity of the taphole 19. In addition, the flow velocity would increase in the local CFZ due to a sudden decrease in flow resistance.…”

Section: Cfd Model Descriptionmentioning

confidence: 99%

Numerical Prediction of Iron Flow and Bottom Erosion in the Blast Furnace Hearth

Shao

Saxén

2012

steel research int.

Self Cite

View full text Add to dashboard Cite

The blast furnace (BF) campaign life, which is limited by the hearth erosion, will be decisive for the process to maintain its dominance in ore-based iron production, so timely prediction of the hearth erosion and proper measures to protect the hearth are important issues. The erosion at the hearth bottom has not received much attention, even though the region is believed to be the most vulnerable part of the hearth. A computational fluid dynamic (CFD) model has been developed to deepen the understanding of iron flow and refractory erosion at the bottom of the hearth. Key boundary and internal conditions, such as slag-iron interface and dead man state, are provided by a BF drainage model which reproduces the tapping process. Simulations with the CFD model illustrate how different factors affect the flow pattern, hearth erosion profile, and bottom breakage ratio. It is shown that the dead man state plays an important role for the flow behavior and erosion conditions in the hearth. The model is demonstrated to predict two erosion types that are commonly encountered in practice.

show abstract

Pressure Drop in the Blast Furnace Hearth with a Sitting Deadman

Cited by 5 publications

References 10 publications

Simulation Study of Blast Furnace Drainage Using a Two-Fluid Model

Simulation Study of Blast Furnace Drainage Using a Two-Fluid Model

Dead-Man Behavior in the Blast Furnace Hearth—A Brief Review

Numerical Prediction of Iron Flow and Bottom Erosion in the Blast Furnace Hearth

Contact Info

Product

Resources

About