Hard breaking of the electrode is sometimes a problem of the quality of the electrode paste, and sometimes has a great relationship with the smelting operation. Such as the unevenness of the three-phase electrode load, or the height of the electrode paste column is too high, the retransmission after a long-term thermal shutdown, the unstable increase of the electrode load caused by the sudden cold and heat, thermal stress, hard break, etc.
The power should be cut off immediately after the electrode breakage occurs. Depending on the length of the electrode breakage, the electrode head that needs to be pulled out must be pulled out, and then add more silica material under the electrode breakage. The electrode of this phase can work normally, and then strengthen the pressure and discharge electrode to make the working end fully meet the working needs. Compared with other methods of firing electrodes, this method saves time and consumption.
After the electrode is hard broken, often due to improper handling, the electrode is easily broken, resulting in leakage. If the paste leakage occurs in the unsintered part, the power should be cut off immediately, and the leakage should be plugged and the electrode should be pulled up to the sintered part, and then the power should be sent. If the enlarged leakage of the electrode is caused by a hard-breaking accident of the electrode, you can insert the phase electrode under the dead phase without cleaning the leakage, and bury the phase electrode with more silica material, and press and release the phase electrode for about 1 Rice, use low voltage and low current to burn the electrode for about 8 hours. After the electrode is completely red, the electrode of this phase can be moved. During this period, the control of the load is the key to the burning of the electrode.
Summarize:
In the production process of ferrosilicon smelting, due to factors such as equipment, raw materials, operation, etc., various electrode accidents often occur. In order to reduce thermal shutdown, the following must be done in production:
1. Appropriate electrode paste particle size
2. According to the electric furnace capacity, seasonal changes, environmental factors, etc., control a certain electrode paste column height
3. Do a good job of electrode maintenance after a long-term thermal shutdown
4. Control the electrode pressure release time and volume
5. Do a good job in the maintenance of electrodes during normal production, and prevent partial feeding during production operations to prevent electrode oxidation.