Heat source for baking electrode paste
The heat source of electrode paste sintering in electrode shell comes from three aspects:
1 heat conduction of the electrode itself. The temperature of the electrode tip can reach about 3500 ℃ due to the arc generated, and the heat is conducted from the bottom to the top. Therefore, the electrode paste will be heated more and more when it falls from the top to the bottom, and will be sintered gradually. The conduction of arc heat is the main source of heat required for baking electrodes.
2 resistance heat generated by current passing through the electrode itself. Current flows through the electrodes. Due to the high sintering resistance of the electrode paste, part of the input power becomes resistance heat, which provides a certain amount of heat for baking the electrode.
3. Conduction and radiation of flame heat on furnace charge surface. The furnace surface temperature is very high, generally about 500-600 ℃, and its heat can be conducted and radiated to the electrode. Especially after the electrode is lowered, the rapid increase of the electrode surface temperature is closely related to the complete sintering of the electrode.