1. Graphite electrodes that are exposed to moisture should be dried before use.

2. Remove the foam plastic protective cap from the spare graphite electrode hole, and check whether the internal thread of the electrode hole is complete.

3. Clean the surface and internal threads of the spare graphite electrode with compressed air free of oil and water; Avoid using steel wire balls or metal brushes to clean with sandpaper.

4. Carefully screw the connector into the electrode hole of one end of the spare graphite electrode (it is not recommended to directly install the connector into the electrode that has been removed from the furnace), without colliding with the thread.

5. Screw the electrode lifting device (preferably made of graphite material) into the electrode hole on the other end of the spare electrode.

6. When lifting the electrode, place a soft material under one end of the spare electrode connector to prevent the ground from damaging the connector; Insert the hook into the lifting ring of the lifting device and lift it. The electrode should be lifted steadily to prevent it from loosening from the B end or colliding with other fixing devices.

7. Lift the spare electrode above the electrode to be connected, align it with the electrode hole, and slowly lower it down; Rotate the backup electrode to make the spiral hook rotate and descend together with the electrode; When the two electrode end faces are 10-20mm apart, clean the exposed parts of the electrode end faces and the joint with compressed air again; When fully lowering the electrode at the end, do not use too much force, otherwise violent collision may cause damage to the threads of the electrode hole and joint.

8. Use a torque wrench to tighten the spare electrode until the end faces of the two electrodes are in close contact (the correct connection gap between the electrode and the connector is less than 0.05mm).