Computations of Liquid Flow and Heat Transfer in the Hearth of a Blast Furnace

2003 ◽  
Author(s):  
Steven Vernengo ◽  
Rade Milanovic ◽  
Chenn Q. Zhou ◽  
Pinakin Chaubal ◽  
D. Huang
Keyword(s):  
Blast Furnace ◽  
Liquid Iron ◽  
Cost Effective ◽  
Steel Mill ◽  
Iron And Steel ◽  
Flow And Heat Transfer ◽  
Steel Making ◽  
Campaign Life ◽  
Computational Fluid Dynamics Cfd ◽  
Economic Vitality

A blast furnace is a key facility in iron and steel making to convert iron oxides into liquid iron. The furnace campaign life is critical to the economic vitality of an integrated steel mill. The wearing of hearth refractories is widely recognized as the main limitation for a long campaign blast furnace life. Distribution of liquid iron flow and refractory temperatures have a significant influence on hearth wear. It is identified that the use of modern advanced techniques such as Computational Fluid Dynamics (CFD) provide the most cost effective solution to gauge the condition of the hearth and understand the reason for changes. In this research, a large commercial scale blast furnace hearth has been simulated using a comprehensive CFD model based on a simplified structure of deadman. The liquid iron flow pattern, temperature distribution in the liquid and the refractories, and the wearing profile in the hearth have been analyzed. A limited parametric study has also been performed. The results are promising and will be presented in the paper.

Validation of CFD Model for Hot Metal Flow and Heat Transfer Simulation in a Blast Furnace

2004 ◽  
Author(s):  
Fang Yan ◽  
Chenn Q. Zhou ◽  
D. Huang ◽  
Pinakin Chaubal
Keyword(s):  
Blast Furnace ◽  
Flow Pattern ◽  
Metal Flow ◽  
Sensitivity Study ◽  
Hot Metal ◽  
Flow And Heat Transfer ◽  
Temperature Distributions ◽  
Campaign Life ◽  
Key Variables ◽  
Computational Fluid Dynamics Cfd

Hearth wearing is the key limit of a blast furnace campaign life. Hot metal flow pattern and temperature distributions are the two key variables to determine the rate and style of the hearth wearing. And the shape, structure and position of the deadman are the three major variables to assign the fluid flow pattern and temperature profile in the hearth. In this paper, a comprehensive computational fluid dynamics (CFD) program which was developed specifically for the simulation of blast furnace hearth was extensively evaluated using actual industrial operation data. That program can predict the liquid flow patterns and temperature distributions of the hot metal as well as temperature profiles in the hearth refractory materials under different conditions. Sensitivity study has also been performed to investigate the effect of the production rate on refractory temperature distribution.

Numerical Modeling of Hot Metal Flow and Heat Transfer in a Blast Furnace

2004 ◽  
Author(s):  
Fang Yan ◽  
Chenn Q. Zhou ◽  
D. Huang ◽  
Pinakin Chaubal
Keyword(s):  
Blast Furnace ◽  
Flow Pattern ◽  
Metal Flow ◽  
Hot Metal ◽  
Flow And Heat Transfer ◽  
Temperature Distributions ◽  
Campaign Life ◽  
Shape Structure ◽  
Key Variables ◽  
Computational Fluid Dynamics Cfd

Hearth wearing is the key limit of a blast furnace campaign life. Hot metal flow pattern and temperature distributions are the two key variables to determine the rate and style of the hearth wearing. And the shape, structure and position of the deadman are the three major variables to assign the fluid flow pattern and temperature profile in the hearth. In this paper, a new method for deadman description was put forward and a comprehensive computational fluid dynamics (CFD) code was described, which was developed specifically for the simulation of blast furnace hearth. That program can predict the liquid flow patterns and temperature distributions of the hot metal as well as temperature profiles in the hearth refractory materials under different conditions. The results predicted by the CFD code were evaluated by comparing with actual industrial operation data.

Investigation of Heat Transfer Phenomena in Blast Furnace Tuyere/Blowpipe Region

2017 ◽  
Author(s):  
Xiang Liu ◽  
Guangwu Tang ◽  
Tyamo Okosun ◽  
Armin K. Silaen ◽  
Stuart J. Street ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Blast Furnace ◽  
Operating Conditions ◽  
Cfd Model ◽  
Pulverized Coal Injection ◽  
Steel Making ◽  
Computational Fluid Dynamics Cfd ◽  
Tuyere Region ◽  
Multi Mode ◽  
Fuel Source

The blast furnace (BF) is a crucial stage in the iron-steel making process. Pulverized coal injection (PCI) and natural gas (NG) have been utilized in blast furnaces as a substitute fuel source for reducing coke rate. Due to introduction of injected fuels into a blast furnace, the combustion and heat transfer in the tuyere/blowpipe region affects the tuyere/blowpipe structure. A comprehensive computational fluid dynamics (CFD) model including PCI/NG combustion, multi-mode heat transfer for the blowpipe/tuyere region of a blast furnace at AK Steel Dearborn Works has been developed, considering detailed material properties in the blowpipe region. The model has been validated by comparing the blowpipe skin temperature profile with thermographic images under typical operating conditions. Based on the developed CFD model, the detailed PCI/NG co-injection combustion has been investigated and the thermal effect on the tuyere tip has been revealed.

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