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ORGANIZER;CN='8th ECIC & 9th ICSTI 2022':MAILTO:info@ecic-icsti.com
LOCATION:Room „Focke Wulf“
SUMMARY:Computational study of gas-flow and temperature distribution in the blast furnace throat region
DESCRIPTION:The gas distribution plays an important role for the blast furnace process as it affects the thermal and chemical conditions in the shaft, and also the pressure drop and burden descent. The distribution of the gas is usually indirectly evaluated based on temperature and composition measurements at several points over a radius or diagonal by above-burden or in-burden probes. Novel acoustic techniques can estimate the gas temperature over the full cross section of the throat. However, an inherent problem is that the gas is redistributed in the upper bed and particularly above it, so measurements above the stockline may no longer reflect the conditions in the shaft.
The paper studies the fate of the gas in the region between the stockline and gas uptakes by a CFD model. Heat transfer is neglected so the study is focused on the redistribution of the gas and its effect on the temperature. It is shown that a strong redistribution and downward-swirling flows may occur, creating non-intuitive gas flow patterns in certain parts of the throat region. The role of burden layers charged at different points is also analyzed, giving rise to different flow patterns above the bed. A brief study of the dynamics of the changes is also undertaken. Finally, the findings are compared with measurements based on acoustic techniques, demonstrating similarities in the patterns. The results of the study highlight the complex flow patterns that can be encountered in the top region of the blast furnace, and can partly explain anomality seen in the measured temperature patterns.

CLASS:PUBLIC
DTSTART:20220630T162500
DTEND:20220630T165000
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