The cause of Graphite electrode breakage

Keyword: graphite electrode

  • Graphite Electrode is stressed decreasingly downward; the electrodes and nipples under the clamping device take maximum force.
  • When electrodes receive externol force, in case of the concentration of the external force is greater than the electrode strength, the electrode will break.
  • The causes of external force are: bulk charge collapse during melting, non-conductive objects below the electrode in the scraps; impact of massive steel bulk flow and etc.
  • uncoordinated response speed of clamping device lifting/descending; eccentric electrode hole of lid; gap because of bad connection of electrodes, and requested nipple strength is not reached.
  • Electrodes and nipples with poor machining accuracy.

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