The analytic for graphite electrode broken:

1.    the appearance of graphite electrode body broken:

a). with the preformation of short arc, but suffer the larger lateral impact force from large flat material.

b). the triphase graphite electrode is not vertical and also have the hanging furnace slag or touch the furnace cover etc.

c). the graphite electrode has the construction defect and the strength lower.

Meanwhile, the break off also is divide into the lateral broken and the vertical broken, while the reason is quite different.

2.    The appearance of the graphite electrode body hole broken:

a). it is different barycenter of triphase graphite electrode body, or the long route for graphite electrodes or insensitive of lift.

b). the bottom of graphite electrode have the no-conducting or less-conducting material. If yes, the sound is lightly but the incline is heavy.

c). the connection is not tight between graphite electrode hole and nipple, or the mismatching because difference expansion coefficient.

3. the appearance of irregular broken of nipple:

   a). there are few dust in the hole or nipple then the large resistance cause the oxidation in some parts of the joint thread is too fast.

   b). the torque is not enough and the connection point is not firmed.

   c). the lift is slight tilted, and it is difference barycenter between graphite graphite electrodes and furnace cover. The broken sound is lightly but sonoro.

   d). the machinery deviation of nipples or the ovality is large.

4. the appearance of regular broken of nipple:

   a). the deviation between graphite hole and nipple is mismatched or torque is not enough then cause the unscrewing thread.

   b). the fluctuation range for second currency is too large or increased rapidly, then the momentary currency is outdistance the rated value too much.

   c). the thermal shock is too large when production, and the connection point of graphite electrode is rubedo and show the resistance is too big. The sound of broken is tedious.

   d). the big quality difference of nipple, and the nipple strength cannot meet the furnace condition.