Causes of electrode paste soft breaking accident
The reason for the soft fracture of the electrode paste is quite right. Generally speaking, there are mainly the following aspects:
(1) The electrode paste contains too much volatile matter.
(2) The iron plate of the electrode shell is too thin or too thick. Too thin will not be able to withstand large external forces and rupture, causing the electrode iron shell to fold or leak and softly break when pressed and put; too thick will cause the iron shell and the electrode core to not contact closely and cause the core to cross. It will also cause soft disconnection.
(3) Poor production of the electrode iron shell or poor welding quality will cause cracking, which will lead to leakage or soft fracture.
(4) When the electrode is lowered, the load of the electric furnace is not reduced or reduced too little. After the electrode is discharged, the load increases too fast, which will also cause the electrode to softly break (except for large furnaces).
(5) The electrode is lowered too frequently, the interval is too short, or after the electrode is lowered, the electrode is too long and causes soft disconnection.
(6) The electrode paste is not added in time, and the position of the electrode paste is too high or too low, which will also cause the electrode to softly break.
(7) The electrode paste block is too large, and the thick branches and leaves are thick when the paste is added, and they are placed on the ribs and are overhead, which may also cause soft fracture.
Supplement soft break:
The reason for the soft break is mainly the excessive amount of binder in the product, but there are also factors of improper operation. The soft break generally occurs after the hard break. After the hard break, the electrode needs to be baked. The electrode baking time is not sufficient, that is, it is easy to switch to normal production. Cause soft disconnection. In some cases, too thin paste brings great difficulties to the firing of the electrode and leads to soft fracture. The fundamental reason is that the self-baking speed of the electrode is less than the consumption speed of the working end of the electrode.