Hebei Fengchao Import and Export Co., Ltd. is one of the most reliable manufacturers and suppliers of graphite electrodes electric arc furnace 550×2000mm in China. With a professional production team, we are able to meet the needs of the majority of our customers. If you're going to wholesale bulk graphite electrodes electric arc furnace 550×2000mm made in China, welcome to get pricelist from our factory.
Our Φ550×2000mm graphite electrode for electric arc furnaces is suitable for 75-90 ton EAFs and features excellent thermal load bearing capacity. Its moderate cross-sectional area together with standard fixed single length helps stabilize the furnace arc and restrain arc deflection under high-intensity smelting cycles. Balanced electrical conductivity and mechanical strength reduce frequent electrode replacement and guarantee stable and high output for medium and large steel mills.
The Φ550×2000mm graphite electrode is manufactured from premium needle coke with a rationally designed cross-section. It permits a high upper limit of operating current and maintains good thermal shock resistance under intense thermal radiation inside the furnace. The standard 2000mm body length fits intermittent electrode replacement during continuous steelmaking processes. Besides mainstream medium and large AC electric arc furnaces, this specification can also be applied to some DC electric arc furnaces. It is widely used in two-shift steel mills for stable scrap melting and mass smelting of carbon steel and low-alloy steel.
The Φ550×2000mm graphite electrode adopts a custom aggregate formula and manufacturing process with controlled thermal stress. Supported by special tooling and molds as well as pre-shipment inspection procedures, batch sampling inspection is implemented to supply consistently qualified products for steelmaking in medium and large EAFs.
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FAQ
Q: How much current surge margin should be reserved for Φ550×2000mm graphite electrodes during actual EAF smelting?
A: Although the nominal operating current of this specification is relatively high, a certain margin for current surge must still be reserved during operation. Instant sharp current rise is prohibited. Sudden overcurrent accelerates radial thermal expansion of the electrode blank and induces internal cracks.
Q: Are matched nipples supplied together when purchasing Φ550×2000mm electrodes? How is thread fit tolerance controlled?
A: Nipples can be supplied as matching accessories. Electrodes and nipples are machined on synchronized CNC equipment. Thread tolerances are strictly implemented in accordance with metallurgical standards to ensure good on-site thread engagement. Mixing nipples from other manufacturers is not recommended.
Q: What measures shall be taken for bottom supports when storing bulk Φ550×2000mm electrodes in warehouses?
A: Each electrode of this specification has a heavy dead weight. Hard wooden sleepers shall be laid at intervals at the bottom of stacks. Local point loading is forbidden. Improper support may cause permanent minor deformation on the lower surface of electrodes.
Q: Is hot nipple connection of Φ550×2000mm electrodes permitted inside the furnace?
A: Hot extension operation is allowed, but operating specifications must be strictly followed. Heavy knocking is prohibited during hot coupling, which may cause chipping of thread teeth under high-temperature conditions.
Q: For overseas projects requiring third-party supervision during manufacturing and random sampling testing, can your factory cooperate on orders of Φ550×2000mm electrodes?
A: Cooperation is available. On-site witnessing and random sampling by third parties can be arranged in the pre-export inspection area. Third-party test reports can be used for customs clearance and project acceptance.
Q: What impacts will radial thermal expansion of large-diameter Φ550 electrodes bring to on-furnace operation?
A: Radial expansion at high temperature is an objective phenomenon. A reasonable clearance must be maintained between the water-cooled clamp and the electrode to prevent scraping and friction that may trigger accidental arcing.
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