The consumption mechanism of graphite electrodes1, End consumptionIncluding the sublimation of the graphite material caused by the high temperature of the arc a
The consumption mechanism of graphite electrodes
1, End consumption
Including the sublimation of the graphite material caused by the high temperature of the arc and the loss of the chemical reaction between the electrode end and the molten steel and slag. It is also related to whether the electrode is inserted into the molten steel to increase carbon.
2, Side oxidation
The amount of oxidation on the side of the electrode is related to the unit oxidation rate and the exposed area. In general, the amount of oxidation on the side of the electrode accounts for about 50% of the total consumption of the electrode.
3. Stump loss
When the electrode is continuously used to the connection of the upper and lower electrodes, a small section of the electrode or the joint (ie the residual body) will be separated due to the oxidation of the body and the penetration of the crack.
4. Breakage
Including broken electrode torso and broken joints. The fracture of the electrode is related to the quality and processing cooperation of the graphite electrode and the joint, and is also related to the steelmaking operation.
5, Peeling and falling off
It is the result of the extreme cold and rapid heating during the smelting process, and the poor thermal vibration resistance of the electrode itself.
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Harm of too high temperature: when molten steel out of cooper mold, the billet shell is thin and easy to break out; The accelerated erosion of refractory can ea
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1. The barrier function (mainly completed by the liquid slag layer) isolates the contact between air and molten steel, blocks the secondary oxidation of molten
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In continuous casting, low corrosion resistance often occurs, which directly leads to uneven composition and will eventually affect the smelting quality. In or