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What issues should be noted during the sintering process of electrode paste?

Time:06/14/2024

During the sintering process of electrode paste, attention should be paid to the following issues:

Control of paste column height: If the paste column is too high, it may cause electrode paste to hang and the electrode is prone to breakage; If the paste column is too low, it may cause adverse phenomena such as premature sintering of the electrode, and it may also be difficult to place the electrode smoothly due to reduced electrode load.

Cleaning during storage: The electrode paste should be kept clean during storage. If there is dust or soil on the surface before filling, it needs to be removed thoroughly.

Pressure maintenance: During sintering, an appropriate pressure should be maintained, usually 0.05 megapascals (equivalent to a 4-meter-high paste column pressure), to ensure electrode sintering density. Meanwhile, the increase in the pressure of the volatile gas in the electrode paste is conducive to the condensation reaction.

Control of sintering temperature: An upward shift in temperature may cause the electrode to overheat, while a downward shift may cause the electrode to underfire. The rate of increase in sintering temperature and sintering time should be appropriate, as too long or too short may lead to a decrease in electrode quality.

The segregation problem of liquid electrode paste: If the sintering temperature rises slowly and the sintering time is too long, the liquid electrode paste may experience segregation, which will affect the quality of the electrode.

The use and maintenance of electrodes: In the process of electric furnace smelting, the use and maintenance of electrodes are crucial. Improper operation, such as placing too many electrodes during discharge or problems with the discharge system, may lead to accidents such as electrode slipping and leakage of the electrode shell.
 

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