Hebei Fengchao Import and Export Co., Ltd. is one of the most reliable manufacturers and suppliers of graphite electrode 350×2200mm 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 electrode 350×2200mm made in China, welcome to get pricelist from our factory.
Our high-power graphite electrodes for electric arc furnaces adopt an optimized needle coke formula to support higher operating current density. Improved thermal shock resistance mitigates nipple fractures caused by repeated thermal cycling under intensified smelting conditions, striking an ideal balance between accelerated tapping rhythm and overall operating costs. This series is suitable for medium-sized high-output EAF steel plants and also compatible with harsh working conditions of ladle refining furnaces, helping steel mills raise hourly smelting capacity.
High-power EAF graphite electrodes are manufactured from premium needle coke to accommodate severe periodic thermal cycling under intensified smelting. With a moderately low coefficient of thermal expansion, they can withstand abrupt temperature changes induced by arc fluctuations during scrap melting and resist frequent alternating thermal stress, preventing massive formation of internal microcracks. HP is an intermediate performance grade, unable to handle extreme overload conditions of ultra-high-power electric furnaces, yet its comprehensive performance is markedly superior to regular-power electrodes. Widely used in medium-sized EAFs after capacity expansion revamping and extensively matched with ladle refining furnaces, they are the preferred furnace consumable for steel mills aiming to speed up smelting rhythm without heavy capital investment for UHP furnace upgrades.
Our high-power EAF graphite electrodes are produced with qualified calcined needle coke raw materials and subjected to secondary impregnation. Supported by dedicated production facilities for high-power electrodes and professional laboratory testing, the blanks feature low internal residual stress and stable thermal shock resistance, delivering reliable service for EAFs and ladle refining furnaces in medium-sized steel plants.
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FAQ
Q: What should be noted regarding current load when HP350×2200mm electrodes are used in intermittent cyclic EAFs at foundries?
A: The allowable current density for this HP grade remains 18 -24 A/cm². For intermittent casting smelting with repeated shutdown and cooling, operation within the lower-to-middle section of the recommended range is advised. Do not apply full maximum current instantly after cold furnace restart, as it may induce surface cracks on the electrode.
Q: Is special adaptation required for the water-cooled copper clamps of the electric furnace for small-diameter HP-350mm electrodes?
A: Yes. The inner clamping diameter of water-cooled copper clamps must match the outer diameter of the 350mm electrode. If the clamping arc surface of the copper clamp is too narrow, local indentations will form on the electrode surface, and fractures tend to originate from these indentations under subsequent thermal cycling during smelting.
Q: The production rhythm in casting workshops is irregular. What recommendations are there for short-term storage of electrodes of this specification?
A: Outdoor stacking should be avoided to prevent alternating wet and dry conditions. Even for short-term stock, plastic protective plugs must be kept in threaded holes. Dramatic humidity fluctuations accelerate thread corrosion and reduce thread assembly accuracy.
Q: Can HP350 electrodes directly replace RP350 electrodes if the casting furnace intends to speed up smelting?
A: Upgrading to HP grade is available, yet simple direct electrode replacement is not recommended. It is also necessary to check transformer tap settings and adjust smelting rhythm accordingly. Blindly raising current alone will aggravate oxidative consumption on end faces.
Q: What are the main differences in consumption characteristics when 350 small-diameter HP electrodes are used in casting EAFs versus LF refining furnaces respectively?
A: The main consumption in casting EAFs comes from side oxidation during intermittent shutdown periods. Under LF refining furnace conditions, the primary risk is nipple fracture caused by repeated arcing. Separate budget forecasts for consumable consumption shall be formulated for the two working conditions.
Q: Can matched dedicated nipples be supplied for HP350×2200mm? What thread specifications are available?
A: Matched nipples can be supplied for this specification. Multiple thread options including 4TPI and 3TPI are available upon customer request. Thread matching inspection is carried out before shipment of every batch.
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