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Research Papers

Computational Fluid Dynamics Analysis of 3D Hot Metal Flow Characteristics in a Blast Furnace Hearth

[+] Author and Article Information
Chenn Q. Zhou

Department of Mechanical Engineering, Purdue University Calumet, Hammond, IN 46323qzhou@calumet.purdue.edu

D. (Frank) Huang

ArcelorMittal Global R&D—East Chicago, ArcelorMittal, East Chicago, IN 46312frank.huang@arcelormittal.com

Yongfu Zhao

Research and Technology Center, United States Steel, Munhall, PA 15120yzhao@uss.com

Pinakin Chaubal

ArcelorMittal Global R&D—East Chicago, ArcelorMittal, East Chicago, IN 46312pinakin.chaubal@arcelormittal.com

J. Thermal Sci. Eng. Appl 2(1), 011006 (Aug 20, 2010) (10 pages) doi:10.1115/1.4002195 History: Received February 23, 2009; Revised May 24, 2010; Published August 20, 2010; Online August 20, 2010

The campaign life of an iron blast furnace depends on hearth wear. Distributions of liquid iron flow and refractory temperatures have a significant influence on hearth wear. A 3D comprehensive computational fluid dynamics model has been developed specifically for simulating the blast furnace hearth. It includes both the hot metal flow and the conjugate heat transfer through the refractories. The model has been extensively validated using measurement data from Mittal Steel old, new IH7 blast furnace and U.S. Steel 13 blast furnace. Good agreements between measured and calculated refractory temperature profiles have been achieved. It has been used to analyze the velocity and temperature distributions and wear patterns of different furnaces and operating conditions. The results can be used to predict the inner profile of hearth and to provide guidance for protecting the hearth.

Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic of Mittal Steel IH7 blast furnace

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Figure 2

Schematic of U.S. Steel 13 blast furnace

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Figure 3

System geometry for heat transfer coefficient calculation

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Figure 4

Effect of heat transfer coefficient on refractory temperatures at 2 m below liquid level opposite to the taphole

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Figure 5

Production rate and refractory temperature history

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Figure 6

Comparison between calculated and measured temperatures

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Figure 7

Schematic of the Mittal Steel’s old IH7

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Figure 8

Comparison between calculated and measured temperature

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Figure 9

Comparison of all thermocouple data for U. S. Steel 13 blast furnace

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Figure 10

3D velocity and temperature fields

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Figure 12

2D view of temperature and heat flux

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Figure 13

Radial distributions in the center plane through the taphole

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Figure 14

Effects of mushroom on streamline and 1150°C erosion line

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Figure 15

Velocity vectors of the mushroom cases 1 m from the inlet

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Figure 16

1150°C erosion profiles for the mushroom cases

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Figure 11

2D view of velocity and streamline

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