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TECHNICAL BRIEFS

A Methodology for Blast Furnace Hearth Inner Profile Analysis

[+] Author and Article Information
Yu Zhang, Rohit Deshpande

Department of Mechanical Engineering, Purdue University Calumet, Hammond, IN 46321

D. Huang, Pinakin Chaubal

USA R&D Center, Mittal Steel Company, East Chicago, IN 46312

Chenn Q. Zhou

Department of Mechanical Engineering, Purdue University Calumet, Hammond, IN 46321qzhou@calumet.purdue.edu

J. Heat Transfer 129(12), 1729-1731 (Apr 03, 2007) (3 pages) doi:10.1115/1.2768100 History: Received November 10, 2006; Revised April 03, 2007

The wear of a blast furnace hearth and the hearth inner profile are highly dependent on the liquid iron flow pattern, refractory temperatures, and temperature distributions at the hot face. In this paper, the detailed methodology is presented along with the examples of hearth inner profile predictions. A new methodology along with new algorithms is proposed to calculate the hearth erosion and its inner profile. The methodology is to estimate the hearth primary inner profile based on 1D heat transfer and to compute the hot-face temperature using the 3D CFD hearth model according to the 1D preestimated and reestimated profiles. After the hot-face temperatures are converged, the hot-face positions are refined by a new algorithm, which is based on the difference between the calculated and measured results, for the 3D computational fluid dynamics (CFD) hearth model further computations, until the calculated temperatures well agree with those measured by the thermocouples.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Average hot face temperatures

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Figure 2

Inner profiles in a side view along the taphole: (a) case 1—base geometry and (b) case 2—inner profile after fine tunings

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Figure 3

Comparison of measured and calculated temperatures in the refractory of hearth: (a) base case without erosion and skull buildup and (b) final case with finalized inner profile

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