The main causes of muffle furnace electrode loss are: chemical loss caused by oxidation of the high-temperature muffle furnace during the smelting process and physical loss caused by electrode breakage.
The reasons for electrode breakage are divided into two aspects: mechanical failure and electrical phase main control.
一、 Mechanical failure control aspects are:
1. The fabric is reasonable. All kinds of steel materials should be distributed reasonably in the basket to prevent light and thin steel materials from forming a ball on the top of the furnace and making it difficult to go down, resulting in large pieces of scrap steel collapsing and breaking the electrodes.
2. When melting, the experimental high-temperature muffle furnace pays attention to the distribution of unmelted furnace materials, and blows oxygen or physically swings the resulting bridging structure to allow the furnace materials to collapse at the elevated position of the electrode to avoid breaking the power supply. pole.
3. The installation of electrodes must be reasonable and standardized to ensure stable clamping and installation.
4. The electrode connection is in the correct position, and the electrode holder should be above the connection, and should not be clamped on the open sleeve or with a lifting ring.
二、 Electrical phase control measures:
1. After high-voltage power is transmitted, it is necessary to ensure that the three-phase balance of the no-load voltage of the secondary short network is ensured.
2. Before the electrode automatically lowers, confirm that the scrap steel layer directly under the electrode is conductive.
3. After the phase electrode drops to contact the scrap steel, observe whether the secondary voltage of the phase electrode drops immediately.
4. If an arc occurs in a certain phase electrode, make sure that the secondary current display of the phase electrode can be seen.
5. Regularly detect the braking force of the electrode hydraulic drive structure.
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