Title

SECONDARY SYSTEM MECHANICAL RESONANCE IN NEW TALL-SHELL SDI-BUTLER ARC FURNACES: DETECTION AND SOLUTIONS

SECONDARY SYSTEM MECHANICAL RESONANCE IN NEW TALL-SHELL SDI-BUTLER ARC FURNACES: DETECTION AND SOLUTIONS

Authorship

Gerhan, Ron E.; Krotov, Yury; Lugo., Nicolás

Gerhan, Ron E.

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Krotov, Yury

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Lugo., Nicolás

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DOI

10.5151/2594-5300-20759

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Abstract

In an effort to develop high productivity, energy efficient, scrap-flexible furnaces, na EAF trend is moving to larger, typically single charge, furnaces. One solution, implemented in a number of plants, is to increase the height of the EAF shells. New, taller shell configurations and increased electrode column length present a challenging situation for graphite electrodes in the EAF. Along with the increased bending moment below the electrode holder, some furnaces exhibit the phenomenon of high energy electrode vibrations potentially leading to electrode breakage. We present vibration analyses results and techniques to reduce the impact on electrode vibration.

In an effort to develop high productivity, energy efficient, scrap-flexible furnaces, na EAF trend is moving to larger, typically single charge, furnaces. One solution, implemented in a number of plants, is to increase the height of the EAF shells. New, taller shell configurations and increased electrode column length present a challenging situation for graphite electrodes in the EAF. Along with the increased bending moment below the electrode holder, some furnaces exhibit the phenomenon of high energy electrode vibrations potentially leading to electrode breakage. We present vibration analyses results and techniques to reduce the impact on electrode vibration.

Keywords

Electrodes; Resonance; Natural frequency.

Electrodes; Resonance; Natural frequency.