Electrode paste hanging refers to a situation where chunks of electrode paste become stuck inside the electrode cylinder and are unable to descend, resulting in large voids within the electrode paste. This condition can be observed when measuring the height of the paste column, as the column height remains unchanged for an extended period. If the situation persists, the electrode cylinder will emit a significant amount of yellow smoke. If not addressed promptly, hanging paste can lead to hard or soft fractures of the electrode, and may even cause explosions within the electrode cylinder.
The main causes of electrode paste hanging include:
- Electrode paste chunks being too large, getting stuck between the rib plates of the electrode shell.
- The paste column being too high, making it difficult for the paste at the top of the electrode to melt and descend due to low temperatures.
- Low ambient temperatures in winter, causing the heating elements to be turned on and off intermittently.
- Large-sized foreign objects falling into the electrode cylinder, blocking the electrode paste chunks.
Preventive and remedial measures for electrode paste hanging include:
- Adding electrode paste according to the required height and granularity specifications to ensure the size and height of the paste meet standards.
- Continuously operating the heater during low winter temperatures to avoid intermittent heating.
- Covering the top of the electrode cylinder to prevent foreign objects from falling in.
- Measuring the height of the paste column every four hours; if no changes are observed for eight consecutive hours, take timely action.
- Remedial methods include tying and dropping heavy objects with a rope, using an oxy-acetylene torch to cut open the holding cylinder or the electrode cylinder, and using steel rods to dislodge the paste.
Additionally, electrode paste hanging may be related to the formulation of the paste, the method of addition, and the operating habits of the personnel. For example, incorrect manual addition of paste might cause two or more chunks to become wedged between the rib plates, leading to electrode paste hanging. Therefore, correct formulation, proper operating habits, and preventive measures are crucial to avoiding electrode paste hanging.
