Electrode suspension refers to the situation where the electrode paste block is stuck inside the electrode cylinder and cannot be lowered, resulting in a large gap in the middle of the electrode paste. When measuring the electrode paste column during suspension, the paste column does not change for a long time. If the time is longer, a large amount of yellow smoke will be emitted from the electrode cylinder. If left untreated after hanging, it can cause the electrode to break hard or soft, and even explode inside the electrode cylinder.
The reasons for electrode sticking include: the electrode sticking block is too large and gets stuck in the electrode shell reinforcement plate; The paste column is too high, and the temperature at the top of the electrode is low, making it difficult to melt and sink. In winter, the temperature is low, and the heating element is constantly on and off. Large foreign objects have fallen into the electrode shaft, blocking the electrode paste block.
A 33000kVA sealed carbide furnace was newly opened in a certain carbide factory in Inner Mongolia during the coldest weather in January. Considering the high electrode paste column and the good strength of the sintered electrodes, the height of the three-phase electrode paste column was increased to 8m or more. As a result, all three-phase electrodes were suspended, and the two-phase electrodes were cut open and processed in the holding cylinder. The other phase could not be processed, and finally, yellow smoke appeared in the electrode cylinder, causing a hard break.
To prevent electrode sticking, it is necessary to add electrode paste according to the required height and particle size of the process; When the temperature is low in winter, the heater should be continuously turned on and not stopped; Cover the motor cylinder to prevent foreign objects from falling in; Measure the height of the paste column every 4 hours, and if there is no change for 8 consecutive hours, it needs to be treated.
The handling method is to tie a heavy object with a rope and smash it down; Cut open the holding cylinder and electrode cylinder with oxygen welding, and stab them with a steel brazing rod.