Precautions When Using Graphite Electrode in Electric Arc Furnace(图文)(图文)
Precautions When Using Graphite Electrode in Electric Arc Furnace
1. Select the appropriate Graphite Electrode type and diameter based on the arc furnace capacity and the transformer capacity provided.
2. During the loading, unloading and storage of Graphite Electrodes, take care to prevent from damage and moisture. The wetted electrodes should be used after drying near to the electric furnace. When lifting, protect the joint holes of the electrodes and the surface threads of the nipples.
3. When connecting the electrodes, use compressed air to blow off the dust in the nipple hole. When using the joint to screw the joint hole of the electrode, the force should be smooth and uniform, and the tightening torque should meet the requirements. When the gripper holds the electrode, be sure to avoid the nipple area, that is, holds above or below the bottom of the electrode nipple.
4. When loading the charge materials into the electric furnace, in order to reduce the impact on the electrode when the charge materials collapses, the bulk material should be placed close to the bottom of the electric furnace. Be careful not to concentrate a large amount of non-conductive objects such as lime directly under the electrode.
5. The melting period is the easiest to break the electrode. At this time, the molten pool is just formed, the charge begins to fall and collapse, and the electrode is easily broken. Therefore, the steelmaker should carefully observe that the lifting mechanism of the holding electrode should be sensitive, and lift the electrode timely.
6. During the refining period, if use the Graphite Electrode to recarburize, the electrode immersed in the molten steel will become thinner quickly, and it will easily break or cause the nipple to fall, resulting in an increase in unit consumption. Therefore, as far as possible, don’t use Graphite Electrode to increase carbon or other methods are used to increase carbon.
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