1) Ordinary power graphite electrode.
Ordinary power graphite electrodes allow the use of graphite electrodes with a current density below 17A/cm2, mainly used in ordinary power electric furnaces such as steelmaking, silicon refining, and yellow phosphorus refining.
The national standards for ordinary power graphite electrodes are as follows:
① For graphite electrodes that are damp, they 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 that is free of oil and water, avoiding cleaning with steel wire balls, metal brushes, or sandcloth.
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 replaced electrode on the furnace), without colliding with the thread.
⑤ Screw the electrode hanger (graphite material hanger is recommended) into the electrode hole on the other end of the spare electrode.
⑥ When lifting electrodes, place a soft object under one end of the spare electrode installation joint to prevent ground damage to the joint; After inserting the hook into the lifting ring of the lifting device, lift the electrode steadily to prevent it from falling off from the B end or colliding with other fixing devices.
⑦ Hang the spare electrode above the electrode to be connected, align it with the electrode hole, and slowly drop it down; Rotate the spare electrode to rotate and lower the spiral hook together with the electrode; When the two electrode end faces are 10-20mm apart, clean the exposed parts of the electrode end faces and joints again with compressed air; When completely lowering the electrode at the end, do not use too much force, otherwise violent collisions may damage 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 joint is less than 0.05mm).
(2) Anti oxidation coating graphite electrode.
An antioxidant coated graphite electrode is a graphite electrode with a surface coated with an antioxidant protective layer (graphite electrode antioxidant). Forming a protective layer that is both conductive and resistant to high-temperature oxidation can reduce electrode loss during steelmaking (19%~50%), extend electrode service life (22%~60%), and reduce electrode energy consumption. The promotion and use of this technology can bring about the following economic and social effects:
① The unit consumption of graphite electrodes is relatively low, resulting in a certain reduction in production costs.
② Graphite electrodes consume less electricity, saving unit steelmaking electricity consumption and production costs.
③ Due to the less frequent replacement of graphite electrodes, the workload of operators is reduced, the risk factor of operation is reduced, and production efficiency is improved.
④ Graphite electrodes are low consumption and low pollution products, which have significant social significance in promoting energy conservation, emission reduction, and environmental protection today.
This technology is still in the research and development stage in China, and some domestic manufacturers have already started production, but it has been widely applied in developed countries such as Japan. At present, there are also companies in China that specialize in importing this type of antioxidant protection coating.
(3) High power graphite electrode.
High power graphite electrodes allow the use of graphite electrodes with a current density of 18-25Acm2, mainly used in high-power electric arc furnaces for steelmaking.
(4) Ultra high power graphite electrode.
Ultra high power graphite electrodes are allowed to use graphite electrodes with a current density greater than 25Acm2, mainly used in ultra-high power steelmaking arc furnaces.
Post time: 3月-20-2024
