What Are The Consumption Mechanism Of Graphite Electrode
What are the consumption mechanism of graphite electrode
1. End consumption
Including the sublimation of graphite material caused by high arc temperature and the loss of chemical reaction between electric extremity and molten steel and slag. It is also related to whether the electrode is inserted into the molten steel. The high temperature sublimation rate at the end is mainly dependent on the current density through the electrode, and secondly on the diameter of the electrode side after oxidation.
2. Side oxidation
The amount of oxidation on the electrode side is related to the unit oxidation rate and exposed area. Under normal circumstances, the electrode side oxidation amount should account for about 50% of the total electrode consumption. In recent years, in order to improve the smelting speed of electric furnace, the frequency of oxygen blowing operation has been increased, resulting in increased oxidation loss of electrodes.
3, stump loss
When the electrode is continuously used at the connection of the upper and lower electrodes, a small section of the electrode or joint (that is, the residual body) is separated due to the oxidation of the body or the penetration of the crack.
4. The electrode is broken
Including broken electrodes, torso and joints. Electrode fracture is related to the quality of the graphite electrode and the joint itself, the processing coordination, and also related to the steelmaking operation.
5. Surface peeling and falling
In the smelting process, the rapid cooling and rapid heating, the electrode itself is the result of poor thermal vibration resistance.